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Shao W, Zhou YW, Chen Z, Chen YL, Li Y, Ban YJ, Yang WS, Xue M, Chen XM. In situ electrochemical potential-induced synthesis of metal organic framework membrane on polymer support for H 2/CO 2 separation. J Colloid Interface Sci 2024; 665:693-701. [PMID: 38552584 DOI: 10.1016/j.jcis.2024.03.181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 03/24/2024] [Accepted: 03/26/2024] [Indexed: 04/17/2024]
Abstract
Metal-Organic Framework (MOF) membranes act as selective layers have offered unprecedented opportunities for energy-efficient and cost-effective gas separation. Searching for the green and sustainable synthesis method of dense MOF membrane has received huge attention in both academia and industry. In this work, we demonstrate an in situ electrochemical potential-induced synthesis strategy to aqueously fabricate Metal Azolate Framework-4 (MAF-4) membranes on polypropylene (PP) support. The constant potential can induce the heterogeneous nucleation and growth of MAF-4, resulting an ultrathin membrane with the thickness of only 390 nm. This high-quality membrane exhibits a high H2/CO2 separation performance with the H2 permeance as high as 1565.75 GPU and selectivity of 11.6. The deployment of this environment friendly one-step fabrication method under mild reaction conditions, such as low-cost polymer substrate, water instead of organic solvent, room temperature and ambient pressure shows great promise for the scale-up of MOF membranes.
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Affiliation(s)
- Wei Shao
- School of Chemical Engineering and Technology, School of Chemistry, GBRCE for Functional Molecular Engineering, IGCME, Sun Yat-sen University, Guangzhou 510275, China
| | - Ying-Wu Zhou
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Zhen Chen
- School of Chemical Engineering and Technology, School of Chemistry, GBRCE for Functional Molecular Engineering, IGCME, Sun Yat-sen University, Guangzhou 510275, China
| | - Yi-Le Chen
- School of Chemical Engineering and Technology, School of Chemistry, GBRCE for Functional Molecular Engineering, IGCME, Sun Yat-sen University, Guangzhou 510275, China
| | - Yi Li
- School of Chemical Engineering and Technology, School of Chemistry, GBRCE for Functional Molecular Engineering, IGCME, Sun Yat-sen University, Guangzhou 510275, China.
| | - Yu-Jie Ban
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Wei-Shen Yang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Ming Xue
- School of Chemical Engineering and Technology, School of Chemistry, GBRCE for Functional Molecular Engineering, IGCME, Sun Yat-sen University, Guangzhou 510275, China.
| | - Xiao-Ming Chen
- School of Chemical Engineering and Technology, School of Chemistry, GBRCE for Functional Molecular Engineering, IGCME, Sun Yat-sen University, Guangzhou 510275, China
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Arshad N, Batool SR, Razzaq S, Arshad M, Rasheed A, Ashraf M, Nawab Y, Nazeer MA. Recent advancements in polyurethane-based membranes for gas separation. Environ Res 2024; 252:118953. [PMID: 38636643 DOI: 10.1016/j.envres.2024.118953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 03/30/2024] [Accepted: 04/14/2024] [Indexed: 04/20/2024]
Abstract
Gas separation membranes are critical in a variety of environmental research and industrial applications. These membranes are designed to selectively allow some gases to flow while blocking others, allowing for the separation and purification of gases for a variety of applications. Therefore, the demand for fast and energy-efficient gas separation techniques is of central interest for many chemical and energy production diligences due to the intensified levels of greenhouse and industrial gases. This encourages the researchers to innovate techniques for capturing and separating these gases, including membrane separation techniques. Polymeric membranes play a significant role in gas separations by capturing gases from the fuel combustion process, purifying chemical raw material used for plastic production, and isolating pure and noncombustible gases. Polyurethane-based membrane technology offers an excellent knack for gas separation applications and has also been considered more energy-efficient than conventional phase change separation methodologies. This review article reveals a thorough delineation of the current developments and efforts made for PU membranes. It further explains its uses for the separation of valuable gases such as carbon dioxide (CO2), hydrogen (H2), nitrogen (N2), methane (CH4), or a mixture of gases from a variety of gas spillages. Polyurethane (PU) is an excellent choice of material and a leading candidate for producing gas-separating membranes because of its outstanding chemical chemistry, good mechanical abilities, higher permeability, and variable microstructure. The presence of PU improves several characteristics of gas-separating membranes. Selectivity and separation efficiency of PU-centered membranes are enhanced through modifications such as blending with other polymers, use of nanoparticles (silica, metal oxides, alumina, zeolite), and interpenetrating polymer networks (IPNs) formation. This manuscript critically analyzes the various gas transport methods and selection criteria for the fabrication of PU membranes. It also covers the challenges facing the development of PU-membrane-based separation procedures.
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Affiliation(s)
- Noureen Arshad
- School of Engineering and Technology, National Textile University, Faisalabad, 37610, Pakistan; Liberty Mills Limited, Karachi, 75700, Pakistan.
| | - Syeda Rubab Batool
- School of Engineering and Technology, National Textile University, Faisalabad, 37610, Pakistan
| | - Sadia Razzaq
- School of Engineering and Technology, National Textile University, Faisalabad, 37610, Pakistan
| | - Mubeen Arshad
- Department of Prosthodontics, Baqai Medical University, Karachi, 74600, Pakistan
| | - Abher Rasheed
- School of Engineering and Technology, National Textile University, Faisalabad, 37610, Pakistan
| | - Munir Ashraf
- School of Engineering and Technology, National Textile University, Faisalabad, 37610, Pakistan; Functional Textile Research Group, National Textile University, Faisalabad, 37610, Pakistan
| | - Yasir Nawab
- School of Engineering and Technology, National Textile University, Faisalabad, 37610, Pakistan; National Center for Composite Materials, National Textile University, Faisalabad, 37610, Pakistan
| | - Muhammad Anwaar Nazeer
- School of Engineering and Technology, National Textile University, Faisalabad, 37610, Pakistan; Biomaterials and Tissue Engineering Research Laboratory, National Textile University, Faisalabad, 37610, Pakistan.
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Pethani KB, Geick T, Kuhla B. A pilot study to capture methane from the exhausted air of dairy cows using a cryogenic approach. J Environ Manage 2024; 356:120588. [PMID: 38518497 DOI: 10.1016/j.jenvman.2024.120588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 01/26/2024] [Accepted: 03/10/2024] [Indexed: 03/24/2024]
Abstract
In the agricultural sector, ruminants are the largest methane (CH4) emission source and many efforts have been undertaken to reduce these greenhouse gas emissions, while compromising animal health and physiology. On the other hand, ruminal CH4, which is biomethane, is in high demand, especially in its liquid form (LBM) that can be used as high energy density fuel. However, CH4 released from a ruminant is immediately mixed with air and highly diluted (<0.1%), challenging CH4 capture technologies. Here we aimed to construct a cryogenic pilot system to capture and liquefy enteric CH4 released from dairy cows kept in respiration chambers. To approach this aim, the outlet air from the chambers was directed through a two-step cooling trap to capture CO2 (-120 to -130 °C) as a solid in the first and CH4 and O2 as liquids in the second cooler (-160 to -180 °C). Warming the second cooler resulted in the evaporation of O2, thereby separating O2 and CH4. LBM purity was in average 90% and was lowest at warming rates higher than 0.88 °C/min. The mean CH4 capture efficiency was 92% and found to be independent of sequestration time and flow rate. However, an increase in CH4 concentration to 0.6%, as it occurs directly at the muzzle of a cow, reduced the sequestration time for CH4. These results show that cryogenic technology can be used to obtain LBM from the air containing ultra-low CH4 concentrations as it is found in cattle barns with high efficiency and purity.
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Affiliation(s)
- Kishan Bharatbhai Pethani
- Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196, Dummerstorf, Germany.
| | - Thomas Geick
- Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196, Dummerstorf, Germany
| | - Björn Kuhla
- Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196, Dummerstorf, Germany
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Chamani F, Tanhaei B, Chenar MP. Innovative strategies for enhancing gas separation: Ionic liquid-coated PES membranes for improved CO 2/N 2 selectivity and permeance. Chemosphere 2024; 351:141179. [PMID: 38224753 DOI: 10.1016/j.chemosphere.2024.141179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 01/07/2024] [Accepted: 01/08/2024] [Indexed: 01/17/2024]
Abstract
As a cost-effective advancement in membrane technology, this study investigates the impact of PEG additive and CBT on the structural, stability, and gas permeance properties of PES-coated membranes, utilizing 1-dodecyl-3-methylimidazolium chloride ionic liquid ([DDMI][Cl] IL) as a carrier liquid. BET and FT-IR analyses highlight the significant enhancement in performance through the immobilization of pores with [DDMIM][Cl] IL. The investigation focuses on PES-M5-coated membranes, revealing excellent stability in finger-like pore structures prepared through direct immersion and nitrogen pressure immobilization. PES-M5-coated membranes with [DDMIM][Cl] IL via direct immersion experience lower weight loss than those coated using nitrogen pressure, with critical pressures at 1.4 and 1.25 bar, respectively. The study identifies PES-coated membranes, particularly PES-M25 (20.88 GPU) with macro-void pores and PES-M5 (29 GPU) with finger-like pores, exhibiting the highest CO2 permeance and CO2/N2 selectivity. As a cost-effective advancement in membrane technology, ionic liquids are employed in support membranes to enhance gas separation. Employing pure PES membranes with varying pore structures, created through the NIPS method, the study immobilizes [DDMI][Cl] IL in membrane pores through nitrogen pressure and direct immersion. Results underscore the successful application of porous support materials coated with ionic liquids for continuous CO2 and sulfur compound separation, showcasing competitive permeability and selectivity compared to traditional polymer membranes.
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Affiliation(s)
- Fatemeh Chamani
- Department of Chemical Engineering, Quchan University of Technology, Quchan, Iran
| | - Bahareh Tanhaei
- Department of Chemical Engineering, Quchan University of Technology, Quchan, Iran.
| | - Mahdi Pourafshari Chenar
- Chemical Engineering Department, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
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Yousef S, Tonkonogovas A, Mohamed A. Graphene-modified MIL-125-NH 2 mixed matrix membranes for efficient H 2 and CH 4 purification. Chemosphere 2024; 352:141362. [PMID: 38309606 DOI: 10.1016/j.chemosphere.2024.141362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 01/31/2024] [Accepted: 02/01/2024] [Indexed: 02/05/2024]
Abstract
This study investigates the performance of the mixed matrix membranes (MMMs) incorporating hybrid fillers of metal-organic framework (MIL-125-NH2) and graphene nanosheets (GNs) for enhanced methane (CH₄) and hydrogen (H₂) separation in the purification sector. The physico-chemical properties of the MMMs were evaluated by SEM, XRD, FTIR, AFM, TGA, DTG, and Brunauer-Emmett-Teller. The permeability and selectivity of the MMMs were determined using different single gases (CO2, N2, H2, and CH4) at various temperatures (20-60 °C). Optimization of fabrication parameters resulted in a significant improvement in porosity and roughness of the fabricated MMMs. The permeabilities of the MOF/PES membrane are 20.3 (CO2), 23.9 (N2), 32.2 (CH4), and 24.1 (H2) x 104 Barrer, while incorporating 0.05 wt% of GNs into the MOF/PES membrane improved the permeability by 36 % (CO2), 41 % (N2), 31 % (CH4), and 370 % (H2). In addition, the H2/CO2 and H2/N2 selectivities of the MMMs significantly increased up to 4 and 3.3, with an improvements of 236 % and 230 %, respectively, compared to the MOF/PES membrane. Furthermore, the CH4/CO2 and CH4/N2 selectivities of the MMMs decreased by 4 %. Therefore, a hybrid filler (10 wt % of MIL-125-NH2 and 0.05 wt % of GNs is highly recommended to improve the permeability and selectivity of the PES membrane, expanding its potential applications in CH4 and H2 purification.
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Affiliation(s)
- Samy Yousef
- Department of Production Engineering, Faculty of Mechanical Engineering and Design, Kaunas University of Technology, LT-51424, Kaunas, Lithuania
| | - Andrius Tonkonogovas
- Lithuanian Energy Institute, Laboratory of Heat Equipment Research and Testing, Breslaujos 3, LT 44403, Kaunas, Lithuania
| | - Alaa Mohamed
- Section of Chemical Science and Engineering, Department of Chemistry and Bioscience, Aalborg University, Niels Bohrs Vej 8, 6700, Esbjerg, Denmark.
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Choudhary P, Saini N, Yoon MH, Awasthi K, Pandey K. ZIF-8 @polycarbonate nanocomposite membranes for improved permeability and selectivity for hydrogen gas. Environ Sci Pollut Res Int 2023; 30:105387-105397. [PMID: 37713078 DOI: 10.1007/s11356-023-29650-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 08/29/2023] [Indexed: 09/16/2023]
Abstract
Through this work, we are reporting high-performance ZIF-8 @polycarbonate nanocomposite membranes with satisfactory structural stability for improving the gas separation performance. ZIF-8 nanoparticles were synthesised using the wet chemical route with cubic morphology and controlled size using CTAB as a surfactant. The membranes were prepared using the solution casting method by adding ZIF-8 filler at various concentrations. The synthesised filler material and MMMs were characterised through X-ray diffraction spectroscopy (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and RAMAN spectroscopy techniques. The gas separation measurements were taken using H2, CO2, and N2 gas in the purest form. The SEM results confirm the formation of spherulite-like morphology with the addition of ZIF-8 due to the crystallisation of the polymer, which increased the membrane's free volume and opened up additional pathways for the transportation of the gas molecules. The gas separation results confirmed that the 15 wt% ZIF-8/PC nanocomposite membrane showed the maximum H2 permeability of 180,970 barrer with an increment of 316.03%, while H2/CO2 and H2/N2 selectivity showed the increments of 89.43% and 103.64%, respectively. Therefore, this PC/ZIF-8 system seems to be a promising approach to developing new H2 selective membranes with high gas permeability and gas selectivity values.
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Affiliation(s)
- Prashant Choudhary
- Materials Research Centre, Malaviya National Institute of Technology Jaipur, Rajasthan, 302017, India
| | - Nishel Saini
- Department of Physics, Malaviya National Institute of Technology Jaipur, Rajasthan, 302017, India
| | - Myung Han Yoon
- Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, 500-712, Republic of Korea
| | - Kamlendra Awasthi
- Department of Physics, Malaviya National Institute of Technology Jaipur, Rajasthan, 302017, India
| | - Kamakshi Pandey
- Materials Research Centre, Malaviya National Institute of Technology Jaipur, Rajasthan, 302017, India.
- Department of Physics, Malaviya National Institute of Technology Jaipur, Rajasthan, 302017, India.
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7
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Chen C, Chen Z, Zhang M, Zheng S, Zhang W, Li S, Pan F. Closo-[B 12 H 12 ] 2- Derivatives with Polar Groups As Promising Building Blocks in Metal-Organic Frameworks for Gas Separation. ChemSusChem 2023; 16:e202300434. [PMID: 37253197 DOI: 10.1002/cssc.202300434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 05/24/2023] [Accepted: 05/25/2023] [Indexed: 06/01/2023]
Abstract
Engineering design of metal organic frameworks (MOFs) for gas separation applications is nowadays a thriving field of investigation. Based on the recent experimental studies of dodecaborate-hybrid MOFs as potential materials to separate industry-relevant gas mixtures, we herein present a systematic theoretical study on the derivatives of the closo-dodecaborate anion [B12 H12 ]2- , which can serve as building blocks for MOFs. We discover that amino functionalization can impart a greater ability to selectively capture carbon dioxide from its mixtures with other gases such as nitrogen, ethylene and acetylene. The main advantage lies in the polarization effect induced by amino group, which favors the localization of the negative charges on the boron-cluster anion and offers a nucleophilic anchoring site to accommodate the carbon atom in carbon dioxide. This work suggests an appealing strategy of polar functionalization to optimize the molecule discrimination ability via preferential adsorption.
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Affiliation(s)
- Chuanxi Chen
- School of Advanced Materials, Peking University, Shenzhen Graduate School, 518055, Shenzhen, People's Republic of China
| | - Zhefeng Chen
- School of Advanced Materials, Peking University, Shenzhen Graduate School, 518055, Shenzhen, People's Republic of China
| | - Mingzheng Zhang
- School of Advanced Materials, Peking University, Shenzhen Graduate School, 518055, Shenzhen, People's Republic of China
| | - Shisheng Zheng
- School of Advanced Materials, Peking University, Shenzhen Graduate School, 518055, Shenzhen, People's Republic of China
| | - Wentao Zhang
- School of Advanced Materials, Peking University, Shenzhen Graduate School, 518055, Shenzhen, People's Republic of China
| | - Shunning Li
- School of Advanced Materials, Peking University, Shenzhen Graduate School, 518055, Shenzhen, People's Republic of China
| | - Feng Pan
- School of Advanced Materials, Peking University, Shenzhen Graduate School, 518055, Shenzhen, People's Republic of China
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Imtiaz A, Othman MHD, Jilani A, Khan IU, Kamaludin R, Ayub M, Samuel O, Kurniawan TA, Hashim N, Puteh MH. A critical review in recent progress of hollow fiber membrane contactors for efficient CO 2 separations. Chemosphere 2023; 325:138300. [PMID: 36893870 DOI: 10.1016/j.chemosphere.2023.138300] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 02/21/2023] [Accepted: 03/02/2023] [Indexed: 06/18/2023]
Abstract
Among wide range of membrane-based operations, membrane contactors, as they reify comparatively modern membrane-based mechanism are gaining quite an attention in both pilot and industrial scales. In recent literature, carbon capture is one of the most researched applications of membrane contactors. Membrane contactors have the potential to minimize the energy consumption and capital cost of traditional CO2 absorptions columns. In a membrane contactor, CO2 regeneration can take place below the solvent boiling point, resulting into lower consumption of energy. Various polymeric as well as ceramic membrane materials have been employed in gas liquid membrane contactors along with several solvents including amino acids, ammonia, amines etc. This review article provides detailed introduction of membrane contactors in terms of CO2 removal. It also discusses that the main challenge that is faced by membrane contactors is membrane pore wetting caused by solvent that in turn can reduce the mass transfer coefficient. Other potential challenges such as selection of suitable solvent and membrane pair as well as fouling are also discussed in this review and are followed by potential ways to reduce them. Furthermore, both membrane gas separation and membrane contactor technologies are analysed and compared in this study on the basis of their characteristics, CO2 separation performances and techno economical transvaluation. Consequently, this review provides an opportunity to thoroughly understand the working principle of membrane contactors along its comparison with membrane-based gas separation technology. It also provides a clear understanding of latest innovations in membrane contactor module designs as well as challenges encountered by membrane contactors along with possible solutions to overcome these challenges. Finally, semi commercial and commercial implementation of membrane contactors has been highlighted.
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Affiliation(s)
- Aniqa Imtiaz
- Advanced Membrane Technology Research Centre, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia; Facultyof Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia
| | - Mohd Hafiz Dzarfan Othman
- Advanced Membrane Technology Research Centre, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia; Facultyof Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia.
| | - Asim Jilani
- Centre of Nanotechnology, King Abdul-Aziz University, 21589, Jeddah, Saudi Arabia.
| | - Imran Ullah Khan
- Department of Chemical and Energy Engineering, Pak-Austria Fachhochshule, Institute of Applied Sciences &Technology, Khanpur Road, Mang, Haripur, 22650, Pakistan
| | - Roziana Kamaludin
- Advanced Membrane Technology Research Centre, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia; Facultyof Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia
| | - Muhammad Ayub
- Advanced Membrane Technology Research Centre, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia; Facultyof Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia
| | - Ojo Samuel
- Advanced Membrane Technology Research Centre, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia; Facultyof Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia
| | | | - NurAwanis Hashim
- Department of Chemical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Mohd Hafiz Puteh
- Faculty of Civil Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, UTM Johor Bahru, Johor, Malaysia
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Budhi YW, Irawan HK, Fitri RA, Al Syifa Elgi Wibisono T, Restiawaty E, Miyamoto M, Uemiya S. Effect of Co-existing gases on hydrogen permeation through a Pd82-Ag18/α-Al 2O 3 membrane during transient start-up. Heliyon 2023; 9:e16979. [PMID: 37484284 PMCID: PMC10361031 DOI: 10.1016/j.heliyon.2023.e16979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Revised: 05/09/2023] [Accepted: 06/02/2023] [Indexed: 07/25/2023] Open
Abstract
The work aimed to study the influence of co-existing gaseous mixture (H2-N2-CO-CO2) on hydrogen permeation through the counter-current flow of a Pd82-Ag18/α-Al2O3 membrane during transient start-up at 350 °C and atmospheric pressure. The membrane was operated for an 8-h. Its performance was measured in terms of hydrogen flux and recovery. The results were mapped on Sieverts-Fick's line and showed a slight membrane deactivation because of the presence of N2 and CO2 in the feed gas. The membrane deactivation became more profound when CO was a constituent. The effect of the co-existing gases on the hydrogen flux, in increasing order, was CO > CO2>N2. The co-existing gases, if present as a significant fraction, induces dilution, concentration polarization, and inhibition over the membrane surface, decreases the membrane performance in term of hydrogen recovery, time lag during transient start-up, and deactivation. It is recommended that the start-up might be run using equimolar H2-N2 mixture.
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Affiliation(s)
- Yogi Wibisono Budhi
- Department of Chemical Engineering, Faculty of Industrial Technology, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, Indonesia
- Research Center for Nanosciences and Nanotechnology, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, Indonesia
- Research Group of Chemical Engineering Process Design and Development, Faculty of Industrial Technology, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, Indonesia
| | - Hans Kristian Irawan
- Department of Chemical Engineering, Faculty of Industrial Technology, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, Indonesia
| | - Raihan Annisa Fitri
- Department of Chemical Engineering, Faculty of Industrial Technology, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, Indonesia
| | - Tareqh Al Syifa Elgi Wibisono
- Department of Chemical Engineering, Faculty of Industrial Technology, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, Indonesia
| | - Elvi Restiawaty
- Research Group of Chemical Engineering Process Design and Development, Faculty of Industrial Technology, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, Indonesia
- Department of Bioenergy Engineering and Chemurgy, Faculty of Industrial Technology, Institut Teknologi Bandung, Jl. Let. Jend. Purn. Dr. (HC) Mashudi No.1, West Java 45363, Indonesia
| | - Manabu Miyamoto
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Shigeyuki Uemiya
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
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10
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Felemban BF, Iqbal SS, Bahadar A, Hossain N, Jabbar A. Reinforcement of single-walled carbon nanotubes on polydimethylsiloxane membranes for CO 2, O 2, and N 2 permeability/selectivity. Environ Sci Pollut Res Int 2023; 30:66800-66811. [PMID: 37099113 DOI: 10.1007/s11356-023-26962-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 04/08/2023] [Indexed: 05/25/2023]
Abstract
In this study, PDMS incorporated with SWCNTs have been fabricated via solution casting method for industrial applications and characterized by the analyses of SEM, FTIR, TGA, AFM, and MST. The modified membranes were further analyzed for CO2, O2, and N2 gas permeability. The strategic membranes have five different weight ratios (0.013, 0.025, 0.038, 0.050, 0.063) compared to neat PDMS membranes. The even distribution of SWCNTs in PDMS provided results that showed improvement in thermal stability. However, mechanical strength has been weakened with increased concentration of nanofiller because of the increase in the number of SWCNTs by increases that imperfections become more severe. The designed polymeric membranes with good thermal stability and adequate mechanical strength can be used for the selectivity and permeability of CO2, O2, and N2 gases. The effect of the PDMS-SWCNTs on gas permeability has been studied. 0.063 wt.% SWCNTs presented the maximum permeability of CO2 gas while maximum O2 and N2 gas permeability have been obtained by 0.013 wt.% SWCNTs. The ideal selectivity of mixed (50:50) gas conditions has been tested. The maximum CO2/N2 ideal selectivity was obtained by 0.050 and 0.063 wt.% SWCNTs while maximum O2/N2 ideal selectivity obtained by 0.050 wt.% SWCNTs. Therefore, the fabrication of this novel SWCNTs-PDMS membrane may lead to separating the industrial exhaust and be used as a potential membrane for environmental remediation in the future.
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Affiliation(s)
- Bassem Fareed Felemban
- Department of Mechanical Engineering, College of Engineering, Taif University, P.O. Box 11099, Taif, 21955, Saudi Arabia
| | | | - Ali Bahadar
- Department of Chemical and Materials Engineering, King Abdulaziz University, Rabigh, 21911, Saudi Arabia
| | - Nazia Hossain
- School of Engineering, RMIT University, VIC, 3001, Melbourne, Australia.
| | - Abdul Jabbar
- Institute of Polymer and Textile Engineering and Technology, University of the Punjab, Lahore, Pakistan
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Olabi AG, Alami AH, Ayoub M, Aljaghoub H, Alasad S, Inayat A, Abdelkareem MA, Chae KJ, Sayed ET. Membrane-based carbon capture: Recent progress, challenges, and their role in achieving the sustainable development goals. Chemosphere 2023; 320:137996. [PMID: 36754298 DOI: 10.1016/j.chemosphere.2023.137996] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 12/20/2022] [Accepted: 01/27/2023] [Indexed: 06/18/2023]
Abstract
The rapid growth in the consumption of fossil fuels resulted in climate change and severe health issues. Among the different proposed methods to control climate change, carbon capture technologies are the best choice in the current stage. In this study, the various membrane technologies used for carbon capture and their impact on achieving sustainable development goals (SDGs) are discussed. Membrane-based carbon capture processes in pre-combustion and post-combustion, which are known as membrane gas separation (MGS) and membrane contactor (MC), respectively, along with the process of fabrication and the different limitations that hinder their performances are discussed. Additionally, the 17 SDGs, where each representing a crucial topic in the current global task of a sustainable future, that are impacted by membrane-based carbon capture technologies are discussed. Membrane-based carbon capture technologies showed to have mixed impacts on different SDGs, varying in intensity and usefulness. It was found that the membrane-based carbon capture technologies had mostly influenced SDG 7 by enhancement in the zero-emission production, SDG 9 by providing 38-42% cost savings compared to liquid absorption, SDG 3 through reducing pollution and particulate matter emissions by 23%, and SDG 13, with SDG 13 being the most positively influenced by membrane-based carbon capture technologies, as they significantly reduce the CO2 emissions and have high CO2 capture yields (80-90%), thus supporting the objectives of SDG 13 in combatting climate change.
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Affiliation(s)
- A G Olabi
- Sustainable and Renewable Energy Engineering Dept., University of Sharjah, Sharjah 27272, United Arab Emirates; Sustainable Energy & Power Systems Research Centre, RISE, University of Sharjah, Sharjah 27272, United Arab Emirates; Mechanical Engineering and Design, Aston University, School of Engineering and Applied Science, Aston Triangle, Birmingham, B4 7ET, UK.
| | - Abdul Hai Alami
- Sustainable and Renewable Energy Engineering Dept., University of Sharjah, Sharjah 27272, United Arab Emirates; Sustainable Energy & Power Systems Research Centre, RISE, University of Sharjah, Sharjah 27272, United Arab Emirates.
| | - Mohamad Ayoub
- Sustainable and Renewable Energy Engineering Dept., University of Sharjah, Sharjah 27272, United Arab Emirates; Sustainable Energy & Power Systems Research Centre, RISE, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Haya Aljaghoub
- Sustainable Energy & Power Systems Research Centre, RISE, University of Sharjah, Sharjah 27272, United Arab Emirates; Industrial Engineering and Engineering Management, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Shamma Alasad
- Mechanical Engineering Department, American University of Sharjah, Sharjah 26666, United Arab Emirates
| | - Abrar Inayat
- Sustainable and Renewable Energy Engineering Dept., University of Sharjah, Sharjah 27272, United Arab Emirates; Sustainable Energy & Power Systems Research Centre, RISE, University of Sharjah, Sharjah 27272, United Arab Emirates.
| | - Mohammad Ali Abdelkareem
- Sustainable and Renewable Energy Engineering Dept., University of Sharjah, Sharjah 27272, United Arab Emirates; Sustainable Energy & Power Systems Research Centre, RISE, University of Sharjah, Sharjah 27272, United Arab Emirates; Chemical Engineering Department, Minia University, Elminia, Egypt.
| | - Kyu-Jung Chae
- Department of Environmental Engineering, Korea Maritime and Ocean University, 727 Taejong-ro, Yeongdo-gu, Busan, 49112, Republic of Korea; Interdisciplinary Major of Ocean Renewable Energy Engineering, Korea Maritime and Ocean University, 727 Taejong-ro, Yeongdo-gu, Busan, 49112, South Korea.
| | - Enas Taha Sayed
- Chemical Engineering Department, Minia University, Elminia, Egypt.
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12
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Suhaimi NH, Yeong YF, Abdul Aziz HN, Lai LS. Synthesis of ZIF-8 tubular membrane via solvent evaporation seeding coupled with microwave assisted heating method for separation of small molecule gases. Chemosphere 2022; 308:136167. [PMID: 36037948 DOI: 10.1016/j.chemosphere.2022.136167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 08/08/2022] [Accepted: 08/19/2022] [Indexed: 06/15/2023]
Abstract
In this work, we systematically study the performance of tubular ZIF-8 membranes in the separation of small molecules including H2, CO2, N2 and CH4. The tubular ZIF-8 membranes were synthesized on α-alumina support via novel dual approach known as solvent evaporation seeding coupled with microwave assisted growth. The durations for the growth of the seed layer through solvent evaporation and membrane layer via microwave heating were varied. The crystallinity and morphology of the resultant membranes were evaluated by using XRD, SEM and IFM analyses. The performance of the resultant tubular ZIF-8 membranes was assessed for small molecule gases permeation at various pressures and temperatures. Highest flux ranging from 0.02 to 0.61 mol/m2s were obtained for gases CO2, CH4, N2, and H2 at feed pressure of 10 bar, whereas highest ideal selectivity of 12.4, 9.3 and 6.9 were obtained for H2/CH4, CO2/CH4, N2/CH4, respectively, at feed pressure of 10 bar and temperature of 30 °C. This work reveals that the tubular ZIF-8 membrane can be synthesized via a feasible and reproducible solvent evaporation seeding coupled with microwave assisted growth method, which can be further explored for the upscaling of the ZIF-8 tubular membrane in pilot scale for gas separation application.
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Affiliation(s)
- Nadia Hartini Suhaimi
- Chemical Engineering Department, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia; CO(2) Research Centre (CO2RES), R&D Building, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia
| | - Yin Fong Yeong
- Chemical Engineering Department, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia; CO(2) Research Centre (CO2RES), R&D Building, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia.
| | | | - Li Sze Lai
- Department of Chemical & Petroleum Engineering, Faculty of Engineering, Technology and Built Environment, UCSI University KL Campus, 56000 Cheras, Kuala Lumpur, Malaysia
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13
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Loh CY, Ye W, Fang S, Lin J, Gu A, Zhang X, Burrows AD, Xie M. Advances in two-dimensional materials for energy-efficient and molecular precise membranes for biohydrogen production. Bioresour Technol 2022; 364:128065. [PMID: 36202283 DOI: 10.1016/j.biortech.2022.128065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 09/28/2022] [Accepted: 09/30/2022] [Indexed: 06/16/2023]
Abstract
Waste management has become an ever-increasing global issue due to population growth and rapid globalisation. For similar reasons, the greenhouse effect caused by fossil fuel combustion, is leading to chronic climate change issues. A novel approach, the waste-to-hydrogen process, is introduced to address the concern of waste generation and climate change with an additional merit of production of a renewable, higher energy density than fossil fuels and sustainable transportation fuel, hydrogen (H2) gas. In the downstream H2 purifying process, membrane separation is one of the appealing options for the waste-to-hydrogen process given its low energy consumption and low operational cost. However, commercial polymeric membranes have hindered membrane separation process due to their low separation performance. By introducing novel two-dimensional materials as substitutes, the limitation of purifying using conventional membranes can potentially be solved. Herein, this article provides a comprehensive review of two-dimensional materials as alternatives to membrane technology for the gas separation of H2 in waste-to-hydrogen downstream process. Moreover, this review article elaborates and provides some perspectives on the challenges and future potential of the waste-to-hydrogen process and the use of two-dimensional materials in membrane technology.
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Affiliation(s)
- Ching Yoong Loh
- Department of Chemical Engineering, University of Bath, Bath BA2 7AY, United Kingdom
| | - Wenyuan Ye
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Shengqiong Fang
- School of Environment and Safety Engineering, Fuzhou University, Fuzhou 350116, China
| | - Jiuyang Lin
- School of Environment and Safety Engineering, Fuzhou University, Fuzhou 350116, China
| | - Ailiang Gu
- Jiangsu DDBS Environmental Remediation Co., Ltd., 210012 Nanjing, China
| | - Xinyu Zhang
- School of Civil and Environmental Engineering, Shandong Jianzhu University, 250101, China
| | - Andrew D Burrows
- Department of Chemistry, University of Bath, Bath BA2 7AY, United Kingdom
| | - Ming Xie
- Department of Chemical Engineering, University of Bath, Bath BA2 7AY, United Kingdom.
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14
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Koutsiantzi C, Mitrakas M, Zouboulis A, Kellartzis I, Stavropoulos G, Kikkinides ES. Evaluation of polymeric membranes' performance during laboratory-scale experiments, regarding the CO 2 separation from CH 4. Chemosphere 2022; 299:134224. [PMID: 35339525 DOI: 10.1016/j.chemosphere.2022.134224] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 01/30/2022] [Accepted: 03/03/2022] [Indexed: 06/14/2023]
Abstract
The present study evaluates the separation performance of a commercially available polymeric membrane, when employed for the upgrade of biogas to enrich CH4 from a simulated binary gas mixture. For this purpose, a laboratory-scale membrane set-up device has been designed and assembled, aiming to achieve the production of high purity biomethane (>95%) with simultaneous recycling and utilization of the (considered as) waste CO2 stream. The examined membrane is a polysulfone (PSF) hollow fiber (HF) one, applied in counter-current flow. The feed concentration of gases consisted between 55-70 vol% and 45-30 vol%, regarding CH4 and CO2 respectively, whereas the effect of retentate pressure was studied in the range between 0.7 and 1.5 bars. The experimental results reveal that the concentration of CH4 in the retentate stream can exceed the target value of 95%, when the applied pressure values are above the limit of 1 bar. Any increase in the feed pressure can lead also to higher CH4 purity on the retentate side, however the retentate mass flow decreases, leading to smaller recovery values of CH4. A significant increase in the CH4 purity is observed, when the CH4 recovery drops below 40%, suggesting the need for the application of multiple membrane modules, operating in series. Regarding the CO2 concentration in the permeate stream, its percentages range between 30 and 50%, which are not considered as sufficient to permit immediate reuse, whereas the need of extra membrane modules to improve the purity of gas streams is confirmed.
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Affiliation(s)
| | - Manassis Mitrakas
- Department of Chemical Engineering, Aristotle University of Thessaloniki, Greece
| | | | - Ioannis Kellartzis
- Department of Chemical Engineering, Aristotle University of Thessaloniki, Greece
| | - George Stavropoulos
- Department of Chemical Engineering, Aristotle University of Thessaloniki, Greece
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15
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Kunalan S, Palanivelu K. Polymeric composite membranes in carbon dioxide capture process: a review. Environ Sci Pollut Res Int 2022; 29:38735-38767. [PMID: 35275372 DOI: 10.1007/s11356-022-19519-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 02/25/2022] [Indexed: 06/14/2023]
Abstract
Carbon dioxide (CO2) emission to the atmosphere is the prime cause of certain environmental issues like global warming and climate change, in the present day scenario. Capturing CO2 from various stationary industrial emission sources is one of the initial steps to control the aforementioned problems. For this concern, a variety of resources, such as liquid absorbents, solid adsorbents, and membranes, have been utilized for CO2 capturing from various emission sources. Focused on membrane-based CO2 capture, polymeric membranes with composite structure (polymeric composite membrane) offer a better performance in CO2 capturing process than other membranes, due to the composite structure it offers higher gas flux and less material usage, thus facile to use high performed expensive material for membrane fabrication and achieved good efficacy in CO2 capture. This compressive review delivers the utilization of different polymeric composite membranes in CO2 capturing applications. Further, the types of polymeric materials used and the different physicochemical modifications of those membrane materials and their CO2 capturing ability are briefly discussed in the text. In conclusion, the current status and possible perspective ways to improve the CO2 capture process in industrial CO2 gas separation applications are described in this review.
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Affiliation(s)
- Shankar Kunalan
- Centre for Environmental Studies, Anna University, Chennai, 600 025, India
| | - Kandasamy Palanivelu
- Centre for Environmental Studies, Anna University, Chennai, 600 025, India.
- Centre for Climate Change and Disaster Management, Anna University, Chennai, 600 025, India.
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16
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Patil T, Dharaskar S, Sinha M, Jampa SS. Effectiveness of ionic liquid-supported membranes for carbon dioxide capture: a review. Environ Sci Pollut Res Int 2022; 29:35723-35745. [PMID: 35260978 DOI: 10.1007/s11356-022-19586-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 03/02/2022] [Indexed: 06/14/2023]
Abstract
The world's population explosion creates a need for natural resources for energy, which will become a significant contributor to global climate change. As we all know, carbon dioxide (CO2) is one of the most critical elements of the global greenhouse gas effect. CO2 capture and storage innovations have piqued researchers' attention in recent decades. Compared to other methods, membrane separation has some positive performance in CO2 capture. CO2 capture with membrane separation using enhanced ionic liquids (ILs) is described in this review. ILs have made an appearance in CO2 capture work as the potential additive, and companies and academics have been interested in CO2 separation for the past two decades. This article comprehensively analyzes the current modern approach in ILs and IL-based membranes for gas separation processes. Based on the latest literature and performance data, this work provides a complete compressive examination of types of ILs and IL-supported membrane performances. ILs for CO2 capture were also explored, and IL-based membranes for different ILs were also studied. This study emphasizes the supremacy of novel ILs for CO2 capture in membrane separation.
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Affiliation(s)
- Tushar Patil
- CO2 Research Group, Department of Chemical Engineering, School of Technology, Pandit Deendayal Energy University, 382426, Raisan, Gandhinagar, India
| | - Swapnil Dharaskar
- CO2 Research Group, Department of Chemical Engineering, School of Technology, Pandit Deendayal Energy University, 382426, Raisan, Gandhinagar, India.
| | - Manishkumar Sinha
- CO2 Research Group, Department of Chemical Engineering, School of Technology, Pandit Deendayal Energy University, 382426, Raisan, Gandhinagar, India
| | - Surendra Sasikumar Jampa
- CO2 Research Group, Department of Chemical Engineering, School of Technology, Pandit Deendayal Energy University, 382426, Raisan, Gandhinagar, India
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17
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Liu Y, Dai J, Zhang Z, Yang Y, Yang Q, Ren Q, Bao Z. Crystal Structure Transformation in Hydrogen-bonded Organic Frameworks via Ion Exchange. Chem Asian J 2021; 16:3978-3984. [PMID: 34626150 DOI: 10.1002/asia.202101151] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Indexed: 01/03/2023]
Abstract
Hydrogen-bonded organic frameworks (HOFs) have emerged as rapidly growing porous materials while established permanent porosities are very fragile and difficult to stabilize due to weak hydrogen-bonding interactions among building units. Herein, we report a stable hydrogen-bonded metallotecton framework (termed as HOF-ZJU-102) that was constructed through hydrogen-bonding networks between cationic metal-organic complexes [Cu2 (Hade)4 (H2 O)2 ]4+ (Hade=adenine) and GeF6 2- anions. The framework not only shows permanent porosity, but also exhibits efficient separation performance of C2 H2 /C2 H4 at room temperature. More interestingly, its crystal structure could be irreversibly transformed into isostructural counterpart HOF-ZJU-101 by ion exchange in the SiF6 2- containing solution, evidenced by multiple characterization techniques including gas sorption measurements, 19 F NMR spectra, FTIR and EDS. Utilizing such an ion exchange mechanism, the collapsed HOF-ZJU-102 could be restored into HOF-ZJU-101 by simply soaking in the salt solution.
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Affiliation(s)
- Ying Liu
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Juanjuan Dai
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Zhiguo Zhang
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.,Institute of Zhejiang University-Quzhou, Quzhou, 324000, P. R. China
| | - Yiwen Yang
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.,Institute of Zhejiang University-Quzhou, Quzhou, 324000, P. R. China
| | - Qiwei Yang
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.,Institute of Zhejiang University-Quzhou, Quzhou, 324000, P. R. China
| | - Qilong Ren
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.,Institute of Zhejiang University-Quzhou, Quzhou, 324000, P. R. China
| | - Zongbi Bao
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.,Institute of Zhejiang University-Quzhou, Quzhou, 324000, P. R. China
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18
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Nazir G, Rehman A, Park SJ. Valorization of shrimp shell biowaste for environmental remediation: Efficient contender for CO 2 adsorption and separation. J Environ Manage 2021; 299:113661. [PMID: 34481373 DOI: 10.1016/j.jenvman.2021.113661] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 08/07/2021] [Accepted: 08/28/2021] [Indexed: 06/13/2023]
Abstract
Over the years, single heteroatom-doped biowaste-derived activated carbons were studied for effective CO2 adsorption. However, binary or ternary heteroatoms-doping is equally important and could significantly affect the CO2 adsorption and flue gas (i.e., CO2/N2) separation. Herein, for the first time, shrimp shell-derived chitosan was used to design a series of ternary (N, S, O)-doped hierarchically porous carbons. The resultant carbons exhibit a large specific surface area (up to 2095 m2/g), micropore volume (up to 1.2647 cm3/g), and high heteroatoms content i.e., N up to 4.1 at. %, S up to 4.6 at. %, and O up to 13.4 at. %. Consequently, high CO2 uptake of 236.80 mg/g at 273 K/1 bar and an excellent CO2/N2 gas selectivity (84.3) was observed, attributed to the synergistic role of narrow micropores (<1 nm) and optimum heteroatom content. Furthermore, the stable CO2 adsorption-desorption cyclic behavior under flue gas conditions i.e., 15% CO2/85% N2 reveals the physisorption mechanism of CO2 adsorption and appears to be an energy-efficient regeneration process. Concluding, our work demonstrates a facile route of valorization of biowaste for environmental remediation to combat biowaste accumulation and mitigating atmospheric CO2 levels, simultaneously.
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Affiliation(s)
- Ghazanfar Nazir
- Department of Chemistry, Inha University, 100 Inharo, Incheon, 22212, South Korea
| | - Adeela Rehman
- Department of Chemistry, Inha University, 100 Inharo, Incheon, 22212, South Korea
| | - Soo-Jin Park
- Department of Chemistry, Inha University, 100 Inharo, Incheon, 22212, South Korea.
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19
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Sarkar R, Kundu TK. Density functional theory-based analyses on selective gas separation by β-PVDF-supported ionic liquid membranes. J Mol Graph Model 2021; 108:108004. [PMID: 34438240 DOI: 10.1016/j.jmgm.2021.108004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Revised: 08/06/2021] [Accepted: 08/08/2021] [Indexed: 12/14/2022]
Abstract
Finding proper candidates for polymer-supported ionic liquid (IL)-based gas separating membranes is a challenge. The current article elucidates the quantum chemical perspective of the selective gas adsorption efficiency, from a mixture of CO2, CO, CH4, and H2, of α- and β-polyvinylidene fluoride (PVDF)-supported imidazolium- and pyridinium-based six ionic liquid membranes. Although IL-based membrane efficiency mainly depends on the gas solubility of ILs, IL/support binding and gas adsorption on the support material are also studied to describe the overall gas adsorption properties of the PVDF/IL complexes. β-PVDF exhibits better binding with the ILs, and better gas affinity, thus, qualified as a more suitable membrane component as compared to α-PVDF. Dispersion-corrected density functional calculations are performed to provide a detailed insight into the energetic interactions, nonbonding intermolecular interactions based on symmetry adapted perturbation theory (SAPT), natural bond orbitals (NBO), Bader's quantum theory of atoms in molecules (QTAIM), reduced density gradient (RDG), frontier orbital interactions, density of states (DOS), and thermochemical analyses of the gas-adsorbed systems. Gas molecules interact with the membrane components through weak hydrogen bonds and exhibit low interaction energies, indicating physisorption of the gases. Gas adsorption energies are more negative than the mutual interaction energies of the gas molecules, ensuring effective gas adsorption by the membrane components. All the β-PVDF/IL systems have shown the highest and lowest affinity for CO2 and H2, respectively, leading to effective separation of CO2 and H2 from the other gases.
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Affiliation(s)
- Ranjini Sarkar
- Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India.
| | - Tarun Kumar Kundu
- Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India.
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Abstract
The acceleration in design of new metal organic frameworks (MOFs) has led scientists to focus on high-throughput computational screening (HTCS) methods to quickly assess the promises of these fascinating materials in various applications. HTCS studies provide a massive amount of structural property and performance data for MOFs, which need to be further analyzed. Recent implementation of machine learning (ML), which is another growing field in research, to HTCS of MOFs has been very fruitful not only for revealing the hidden structure-performance relationships of materials but also for understanding their performance trends in different applications, specifically for gas storage and separation. In this review, we highlight the current state of the art in ML-assisted computational screening of MOFs for gas storage and separation and address both the opportunities and challenges that are emerging in this new field by emphasizing how merging of ML and MOF simulations can be useful.
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Affiliation(s)
- Cigdem Altintas
- Department
of Chemical and Biological Engineering, Koc University, Rumelifeneri Yolu, Sariyer, 34450 Istanbul, Turkey
| | - Omer Faruk Altundal
- Department
of Chemical and Biological Engineering, Koc University, Rumelifeneri Yolu, Sariyer, 34450 Istanbul, Turkey
| | - Seda Keskin
- Department
of Chemical and Biological Engineering, Koc University, Rumelifeneri Yolu, Sariyer, 34450 Istanbul, Turkey
| | - Ramazan Yildirim
- Department
of Chemical Engineering, Boğaziçi
University, Bebek, 34342 Istanbul, Turkey
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21
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Miao F, Jiang H, Cheng XL. Separation of C 1/C 3 binary organic gas mixtures via flexible nanoporous carbon molecular sieves: DFT calculations and MD simulations. J Mol Graph Model 2021; 106:107911. [PMID: 33848949 DOI: 10.1016/j.jmgm.2021.107911] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 03/20/2021] [Accepted: 03/22/2021] [Indexed: 10/21/2022]
Abstract
The C1/C3 hydrocarbon gas separation characteristics of nanoporous carbon molecular sieves (CMS) are studied using DFT calculations and MD simulations. To efficiently separate the equimolar CH4/C3H8 and CH4/C3H6 gas mixtures, CNT gas transport channels are embed between the polyphenylene membranes which created structural deformation for both CNT and membrane. The adsorption and permeation of gas molecules via CMS and the effect of nanochannel density and electric field on gas selectivity are analyzed. In addition to the direct permeation, gas molecules that adsorbed on the NPG surface also making a significant contribution to the gas permeability comes from a surface mechanism. Results also uncovered that the gas selectivity is enhanced by the electric field along the + x and +y axes, whereas reduced by the electric field along the + z and -z axes. Plainly, this CMS provides a feasible way for the efficient separation of the C1/C3 organic gas mixtures.
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Affiliation(s)
- Feng Miao
- Key Laboratory of Electronic and Information Engineering (Southwest Minzu University), State Ethnic Affairs Commission, Chengdu, 610041, China
| | - Hao Jiang
- General Education Department, Sichuan Police College, Luzhou, 646000, China.
| | - Xin-Lu Cheng
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, 610065, China
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22
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Lai WH, Hong CY, Tseng HH, Wey MY. Fabrication of waterproof gas separation membrane from plastic waste for CO 2 separation. Environ Res 2021; 195:110760. [PMID: 33493535 DOI: 10.1016/j.envres.2021.110760] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 01/08/2021] [Accepted: 01/13/2021] [Indexed: 06/12/2023]
Abstract
In this study, waste polystyrene (wPS) plastic was used to prepare gas-separation membranes with hot-pressing technology to reduce the accumulation of plastic waste. Polystyrene is a commonly used polymer for the production of plastic products, and it is also used in the synthesis of membranes for gas separation. Compared to the traditional synthesis process, hot-pressing is environmentally friendly because it does not require organic solvents. The mobility of the polymer chain and the integrity and free volume of the membrane are affected by the temperature, pressure, duration, and annealing environment of the hot-pressing process, thereby altering the performance of the membrane. Additionally, when the wPS contained polybutadiene, the gas separation membranes showed a selectivity of 17.14 for CO2/N2. The membranes also exhibited ideal waterproof performance when the membranes were operated under water pressures of 1-5 bar. Therefore, membranes derived from wPS through hot pressing are waterproof and can be used for gas separation. Furthermore, they are expected to maintain their separation performance in complex environments.
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Affiliation(s)
- Wen-Hsiung Lai
- Department of Environmental Engineering, National Chung Hsing University, Taichung, 402, Taiwan, ROC
| | - Chen-Yao Hong
- Department of Environmental Engineering, National Chung Hsing University, Taichung, 402, Taiwan, ROC
| | - Hui-Hsin Tseng
- School of Occupational Safety and Health, Chung Shan Medical University, Taichung, 402, Taiwan, ROC; Department of Occupational Medicine, Chung Shan Medical University Hospital, Taichung, 402, Taiwan, ROC.
| | - Ming-Yen Wey
- Department of Environmental Engineering, National Chung Hsing University, Taichung, 402, Taiwan, ROC.
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Akbarzadeh E, Shockravi A, Vatanpour V. High performance compatible thiazole-based polymeric blend cellulose acetate membrane as selective CO 2 absorbent and molecular sieve. Carbohydr Polym 2021; 252:117215. [PMID: 33183645 DOI: 10.1016/j.carbpol.2020.117215] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 10/07/2020] [Accepted: 10/07/2020] [Indexed: 12/25/2022]
Abstract
Green blend membranes comprise of high thermal resistance ortho-linked thiazole-based polyimine (PM-4) including thioether linkage were fabricated in combination of glassy cellulose acetate (CA). The thermal stabilities of PMs were examined using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Morphological aspects and functional groups of the membranes were investigated via field emission scanning electron microscopy (FESEM) and Fourier transform infrared spectroscopy-attenuated total reflectance (FTIR-ATR) analysis respectively. X-ray diffraction (XRD) and mechanical strength were determined as well. The effects of polyimine content, pressure and temperature were studied on CO2 permeability (P) and selectivity. The pressure changes revealed exponentially increases on CO2 permeability by plasticization, facilitated transfer and solution-diffusion mechanisms, but decreases on CH4 and N2 permeations. Remarkable permeation (P = 3000 Barrer) of CA/PM-4 (1:3 % w/w) and ideal selectivity ratios of CO2/N2 = 59, CO2/CH4 = 33.7 were obtained at 3 bar and 35 °C versus neat CA membrane.
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Affiliation(s)
- Elaheh Akbarzadeh
- Department of Organic Chemistry, Faculty of Chemistry, Kharazmi University, Mofatteh Avenue 49, 15719-14911 Tehran, Iran.
| | - Abbas Shockravi
- Department of Organic Chemistry, Faculty of Chemistry, Kharazmi University, Mofatteh Avenue 49, 15719-14911 Tehran, Iran.
| | - Vahid Vatanpour
- Department of Applied Chemistry, Faculty of Chemistry, Kharazmi University, Mofatteh Avenue 49, 15719-14911 Tehran, Iran.
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Azam SU, Hussain A, Farrukh S, Noor T, Liu Y. Enhancement in the selectivity of O 2/N 2 via ZIF-8/CA mixed-matrix membranes and the development of a thermodynamic model to predict the permeability of gases. Environ Sci Pollut Res Int 2020; 27:24413-24429. [PMID: 32306250 DOI: 10.1007/s11356-020-08778-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 04/06/2020] [Indexed: 06/11/2023]
Abstract
Zeolitic imidazolate framework-8 (ZIF-8) has a sodalite topology. ZIF-8 is composed of zinc ion coordinated by four imidazolate rings. The pore aperture of ZIF-8 is 3.4 Å, which readily retains large gas molecules like N2. In this work, mixed-matrix membranes (MMMs) have been fabricated by utilizing ZIF-8 and pristine cellulose acetate (CA) for O2/N2 separation. Membranes of pristine CA and MMMs of ZIF-8/CA at various ZIF-8 concentrations were prepared in tetrahydrofuran (THF). Permeation results of the fabricated membranes revealed increasing selectivity for O2/N2 with increasing pressure as well as ZIF-8/CA concentration up to 5% (w/w). The selectivity of O2/N2 increased 4 times for MMMs containing 5% (w/w) of ZIF-8/CA as compared with the pristine CA membrane. A thermodynamic model has also been developed to predict the permeability of gases through polymeric membranes. The results were compared with literature data as well as the pristine CA membrane produced in this work for model validation.
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Affiliation(s)
- Shakir Ul Azam
- School of Chemical & Materials Engineering (SCME), National University of Sciences & Technology (NUST), Islamabad, Pakistan
| | - Arshad Hussain
- School of Chemical & Materials Engineering (SCME), National University of Sciences & Technology (NUST), Islamabad, Pakistan
| | - Sarah Farrukh
- School of Chemical & Materials Engineering (SCME), National University of Sciences & Technology (NUST), Islamabad, Pakistan.
| | - Tayyaba Noor
- School of Chemical & Materials Engineering (SCME), National University of Sciences & Technology (NUST), Islamabad, Pakistan
| | - Yangxian Liu
- School of Energy and Power Engineering, Jiangsu University, Zhenjiang, China
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25
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Wang H, Bai JQ, Yin Y, Wang SF. Experimental and numerical study of SO 2 removal from a CO 2/SO 2 gas mixture in a Cu-BTC metal organic framework. J Mol Graph Model 2020; 96:107533. [PMID: 31978827 DOI: 10.1016/j.jmgm.2020.107533] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 12/31/2019] [Accepted: 01/06/2020] [Indexed: 11/26/2022]
Abstract
The mechanism of SO2 removal from a CO2/SO2 gas mixture in a copper benzene-1, 3, 5-tricarboxylate (Cu-BTC) material is investigated at the molecular level by the grand canonical Monte Carlo method. The effects of seven kinds of force-field relationships among CO2, SO2 and Cu-BTC on the selectivity for a SO2/CO2 gas mixture at different temperatures are studied in detail. The accuracy of the simulation model is validated by the experimental data. The results show that more SO2 molecules are adsorbed than CO2, and the electrostatic interactions involving SO2 are more sensitive to temperature than CO2 is. The multilayer desorption for SO2 and CO2 occurs in large-square channels. The effect of the electrostatic interactions involving SO2 is stronger than the interactions of CO2. The forms of CO2 and SO2 adsorption in Cu-BTC with electrostatic interactions are Cu2+∙∙∙OCO and Cu2+∙∙∙OSO, respectively.
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Affiliation(s)
- H Wang
- School of Aeronautics, Northwestern Polytechnical University, Xi' an, Shaanxi, 710072, China
| | - J Q Bai
- School of Aeronautics, Northwestern Polytechnical University, Xi' an, Shaanxi, 710072, China.
| | - Y Yin
- MOE Key Laboratory of Thermo-Fluid Science and Engineering, School of Energy and Power Engineering, Xi' an Jiaotong University, Xi' an, Shaanxi, 710049, China
| | - S F Wang
- School of Engineering, Newcastle University, Newcastle, NE1 7RU, UK
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26
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Lu X, Jiang Z, Yuan X, Wu Y, Malpass-Evans R, Zhong Y, Liang Y, McKeown NB, Wang H. A bio-inspired O 2-tolerant catalytic CO 2 reduction electrode. Sci Bull (Beijing) 2019; 64:1890-1895. [PMID: 36659584 DOI: 10.1016/j.scib.2019.04.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 03/12/2019] [Accepted: 03/12/2019] [Indexed: 01/21/2023]
Abstract
The electrochemical reduction of CO2 to give CO in the presence of O2 would allow the direct valorization of flue gases from fossil fuel combustion and of CO2 captured from air. However, it is a challenging task because O2 reduction is thermodynamically favored over that of CO2. 5% O2 in CO2 near catalyst surface is sufficient to completely inhibit the CO2 reduction reaction. Here we report an O2-tolerant catalytic CO2 reduction electrode inspired by part of the natural photosynthesis unit. The electrode comprises of heterogenized cobalt phthalocyanine molecules serving as the cathode catalyst with >95% Faradaic efficiency (FE) for CO2 reduction to CO coated with a polymer of intrinsic microporosity that works as a CO2-selective layer with a CO2/O2 selectivity of ∼20. Integrated into a flow electrolytic cell, the hybrid electrode operating with a CO2 feed gas containing 5% O2 exhibits a FECO of 75.9% with a total current density of 27.3 mA/cm2 at a cell voltage of 3.1 V. A FECO of 49.7% can be retained when the O2 fraction increases to 20%. Stable operation for 18 h is demonstrated. The electrochemical performance and O2 tolerance can be further enhanced by introducing cyano and nitro substituents to the phthalocyanine ligand.
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Affiliation(s)
- Xu Lu
- Department of Chemistry, Yale University, New Haven, CT 06520, USA; Energy Sciences Institute, Yale University, West Haven, CT 06516, USA
| | - Zhan Jiang
- Department of Materials Science and Engineering, Shenzhen Key Laboratory of Printed Organic Electronics, Southern University of Science and Technology, Shenzhen 518055, China
| | - Xiaolei Yuan
- Department of Chemistry, Yale University, New Haven, CT 06520, USA; Energy Sciences Institute, Yale University, West Haven, CT 06516, USA; Institute of Functional Nano and Soft Materials, Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
| | - Yueshen Wu
- Department of Chemistry, Yale University, New Haven, CT 06520, USA; Energy Sciences Institute, Yale University, West Haven, CT 06516, USA
| | | | - Yiren Zhong
- Department of Chemistry, Yale University, New Haven, CT 06520, USA; Energy Sciences Institute, Yale University, West Haven, CT 06516, USA
| | - Yongye Liang
- Department of Materials Science and Engineering, Shenzhen Key Laboratory of Printed Organic Electronics, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Neil B McKeown
- EastChem, School of Chemistry, University of Edinburgh, Edinburgh EH9 3FJ, UK.
| | - Hailiang Wang
- Department of Chemistry, Yale University, New Haven, CT 06520, USA; Energy Sciences Institute, Yale University, West Haven, CT 06516, USA.
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27
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Li H, Li L, Lin RB, Zhou W, Zhang Z, Xiang S, Chen B. Porous metal-organic frameworks for gas storage and separation: Status and challenges. EnergyChem 2019; 1:10.1016/j.enchem.2019.100006. [PMID: 38711814 PMCID: PMC11071076 DOI: 10.1016/j.enchem.2019.100006] [Citation(s) in RCA: 278] [Impact Index Per Article: 55.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
Gases are widely used as energy resources for industry and our daily life. Developing energy cost efficient porous materials for gas storage and separation is of fundamentally and industrially important, and is one of the most important aspects of energy chemistry and materials. Metal-organic frameworks (MOFs), representing a novel class of porous materials, feature unique pore structure, such as exceptional porosity, tunable pore structures, ready functionalization, which not only enables high density energy storage of clean fuel gas in MOF adsorbents, but also facilitates distinct host-guest interactions and/or sieving effects to differentiate different molecules for energy-efficient separation economy. In this review, we summarize and highlight the recent advances in the arena of gas storage and separation using MOFs as adsorbents, including progresses in MOF-based membranes for gas separation, which could afford broader concepts to the current status and challenges in this field.
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Affiliation(s)
- Hao Li
- Fujian Provincial Key Laboratory of Polymer Materials, College of Materials Science and Engineering, Fujian Normal University, Fuzhou 350007, Fujian, PR China
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249-0698, United States
| | - Libo Li
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249-0698, United States
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, PR China
- Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, Taiyuan 030024, Shanxi, PR China
| | - Rui-Biao Lin
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249-0698, United States
| | - Wei Zhou
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD 20899-6102, United States
| | - Zhangjing Zhang
- Fujian Provincial Key Laboratory of Polymer Materials, College of Materials Science and Engineering, Fujian Normal University, Fuzhou 350007, Fujian, PR China
| | - Shengchang Xiang
- Fujian Provincial Key Laboratory of Polymer Materials, College of Materials Science and Engineering, Fujian Normal University, Fuzhou 350007, Fujian, PR China
| | - Banglin Chen
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249-0698, United States
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Abstract
Metal-organic frameworks (MOFs) are organic-inorganic hybrid solids constructed from the coordination interaction of metal ions/clusters with organic linkers, which currently represent one of the most rapidly expanding platforms for new functional materials. Based on well-established approaches, involving tuning the pore sizes, incorporation of functional sites and post-synthetic modification, the pore structures of MOFs can be readily controlled for multifunctional applications. In this brief review, we summarize and highlight our research progresses during our journey on developing functional MOFs for various applications including gas storage, gas separations, luminescent sensing, proton conduction, and molecular recognitions.
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Affiliation(s)
- Rui-Biao Lin
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249-0698, USA
| | - Shengchang Xiang
- College of Chemistry and Chemical Engineering, Fujian Provincial Key Laboratory of Polymer Materials, Fujian Normal University, 32 Shangsan Road, Fuzhou 350007, China
| | - Bin Li
- Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yuanjing Cui
- Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Guodong Qian
- Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Wei Zhou
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD 20899-6102, USA
| | - Banglin Chen
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249-0698, USA
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29
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Riasat Harami H, Asghari M. 3-Aminopropyltriethoxysilane-aided cross-linked chitosan membranes for gas separation: grand canonical Monte Carlo and molecular dynamics simulations. J Mol Model 2019; 25:49. [PMID: 30701322 DOI: 10.1007/s00894-019-3929-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 01/09/2019] [Indexed: 11/29/2022]
Abstract
Molecular simulations were performed to consider the structural and transport properties of chitosan/3-aminopropyltriethoxysilane (APTEOS) mixed matrix membranes (MMMs). In order to consider the presence of APTEOS content on the performances of membrane, various amounts of APTEOS were added to the polymeric matrix as a cross-linker. Structural characterizations such as radial distribution function (RDF), fractional free volume (FFV) and X-ray diffraction (XRD) were carried out on the simulated cells. Self-diffusivity and solubility of membranes were calculated using mean square displacement (MSD) and adsorption isotherms, respectively. Additionally, permeability and permselectivity of CO2 and N2 gases were calculated by grand canonical Monte Carlo and molecular dynamics methods. The system temperature was set to 298 K using a Nose-Hoover thermostat. According to the results, upon increasing APTEOS loading, CO2 permeability increases until 10 wt.% loading. Then, by adding 20 wt.% of APTEOS, CO2 permeability decreases, which could be related to higher crystallinity. XRD graphs indicated that the crystallinity decreased when adding 10 wt.% APTEOS, while higher APTEOS content (up to 20 wt.%) led to higher crystallinity percentage, consistent with permeability results. Compared to literature reports, the present simulation indicated higher accuracy for defining the structural and transport properties of APTEOS cross-linked chitosan MMMs. Graphical abstract 3-Aminopropyltriethoxysilane-aided cross-linked chitosan membranes for gasseparation.
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Affiliation(s)
- Hossein Riasat Harami
- Separation Processes Research Group (SPRG), Department of Engineering, University of Kashan, Kashan, Iran
| | - Morteza Asghari
- Separation Processes Research Group (SPRG), Department of Engineering, University of Kashan, Kashan, Iran. .,Energy Research Institute, University of Kashan, Ghotb-e-Ravandi Ave, Kashan, Iran.
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30
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Li H, Li L, Lin RB, Ramirez G, Zhou W, Krishna R, Zhang Z, Xiang S, Chen B. Microporous Metal-Organic Framework with Dual Functionalities for Efficient Separation of Acetylene from Light Hydrocarbon Mixtures. ACS Sustain Chem Eng 2019; 7:10.1021/acssuschemeng.8b05480. [PMID: 33659101 PMCID: PMC7923745 DOI: 10.1021/acssuschemeng.8b05480] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Separating acetylene from light hydrocarbon mixtures like ethylene is a very important process for downstream industrial applications. Herein, we report a new MOF [CuL2(SiF6)] (UTSA-220, L = (1E,2E)-1,2-bis(pyridin-4-ylmethylene)hydrazine) with dual functionalities featuring optimal pore size with strong binding sites for acetylene. UTSA-220 exhibits apparently higher uptake capacity for C2H2 than those for other light hydrocarbons. The potential of this material for trace C2H2 removal from C2H4 has also been demonstrated by a dynamic breakthrough experiment performed with C2H2/C2H4 (1/99 v/v) under simulated industrial conditions. According to the dispersion-corrected density functional theory (DFT-D) simulation, SiF6 2- and azine moieties serve as preferential binding sites for C2H2, indicating the feasibility of the dual functionalities incorporated in UTSA-220 for adsorbent-based C2H2 separations.
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Affiliation(s)
- Hao Li
- Fujian Provincial Key Laboratory of Polymer Materials, College of Materials Science and Engineering, Fujian Normal University, Fuzhou 350007, Fujian, People’s Republic of China
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, United States
| | - Libo Li
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, United States
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, People’s Republic of China
| | - Rui-Biao Lin
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, United States
- Corresponding Authors B. Chen. . S. Xiang. . R.-B. Lin.
| | - Giorgio Ramirez
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, United States
| | - Wei Zhou
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6102, United States
| | - Rajamani Krishna
- Van ‘t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Zhangjing Zhang
- Fujian Provincial Key Laboratory of Polymer Materials, College of Materials Science and Engineering, Fujian Normal University, Fuzhou 350007, Fujian, People’s Republic of China
| | - Shengchang Xiang
- Fujian Provincial Key Laboratory of Polymer Materials, College of Materials Science and Engineering, Fujian Normal University, Fuzhou 350007, Fujian, People’s Republic of China
- Corresponding Authors B. Chen. . S. Xiang. . R.-B. Lin.
| | - Banglin Chen
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, United States
- Corresponding Authors B. Chen. . S. Xiang. . R.-B. Lin.
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Li L, Xu R, Song C, Zhang B, Liu Q, Wang T. A Review on the Progress in Nanoparticle/C Hybrid CMS Membranes for Gas Separation. Membranes (Basel) 2018; 8:E134. [PMID: 30563003 DOI: 10.3390/membranes8040134] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 12/03/2018] [Accepted: 12/11/2018] [Indexed: 11/21/2022]
Abstract
Carbon molecular sieve (CMS) membranes are novel materials derived from the pyrolysis of the polymeric precursors and have a well-developed ultra-microporous structure that can separate small gas pairs with minor difference in diameter, and thus exhibit higher gas permeability and selectivity than polymeric membranes. However, the gas permeability for traditional pure CMS membranes now cannot satisfy the requirements of commercial applications due to their disordered pore structure and high gas molecular diffusion resistance. Incorporating functional materials into membrane precursors to fabricate hybrid CMS membranes has been regarded as an effective way to tune the disordered pore structure of traditional pure CMS membranes, and thus to greatly improve their gas permeability. Many nanoparticles have been tested as the functional foreign materials to fabricate the hybrid CMS membranes with more developed microporous structure and enhanced gas separation performance. This review discusses the hybridized nanoparticle selection and effect of the species, quantities and particle sizes of the foreign materials on CMS membrane characteristics and performance. The function of the materials incorporated inside the hybrid CMS membranes is also analyzed. It is identified that preparation of hybrid CMS membranes provides a simple and convenient route to efficiently improve the trade-off relationship between permeability and selectivity, and to enable the construction of carbon-based composite materials with novel functionalities in membrane science.
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Bakonyi P, Kumar G, Bélafi-Bakó K, Kim SH, Koter S, Kujawski W, Nemestóthy N, Peter J, Pientka Z. A review of the innovative gas separation membrane bioreactor with mechanisms for integrated production and purification of biohydrogen. Bioresour Technol 2018; 270:643-655. [PMID: 30213541 DOI: 10.1016/j.biortech.2018.09.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 09/02/2018] [Accepted: 09/03/2018] [Indexed: 06/08/2023]
Abstract
This review article focuses on an assessment of the innovative Gas Separation Membrane Bioreactor (GS-MBR), which is an emerging technology because of its potential for in-situ biohydrogen production and separation. The GS-MBR, as a special membrane bioreactor, enriches CO2 directly from the headspace of the anaerobic H2 fermentation process. CO2 can be fed as a substrate to auxiliary photo-bioreactors to grow microalgae as a promising raw material for biocatalyzed, dark fermentative H2-evolution. Overall, these features make the GS-MBR worthy of study. To the best of the authors' knowledge, the GS-MBR has not been studied in detail to date; hence, a comprehensive review of this topic will be useful to the scientific community.
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Affiliation(s)
- Péter Bakonyi
- Research Institute of Bioengineering, Membrane Technology and Energetics, University of Pannonia, Egyetem u. 10, 8200 Veszprém, Hungary
| | - Gopalakrishnan Kumar
- Institute of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger, Box 8600 Forus, 4036 Stavanger, Norway; School of Civil and Environmental Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Katalin Bélafi-Bakó
- Research Institute of Bioengineering, Membrane Technology and Energetics, University of Pannonia, Egyetem u. 10, 8200 Veszprém, Hungary
| | - Sang-Hyoun Kim
- School of Civil and Environmental Engineering, Yonsei University, Seoul 03722, Republic of Korea.
| | - Stanislaw Koter
- Faculty of Chemistry, Department of Physical Chemistry, Nicolaus Copernicus University in Toruń, Gagarin Street 7, 87-100, Toruń, Poland
| | - Wojciech Kujawski
- Faculty of Chemistry, Department of Physical Chemistry, Nicolaus Copernicus University in Toruń, Gagarin Street 7, 87-100, Toruń, Poland
| | - Nándor Nemestóthy
- Research Institute of Bioengineering, Membrane Technology and Energetics, University of Pannonia, Egyetem u. 10, 8200 Veszprém, Hungary
| | - Jakub Peter
- Institute of Macromolecular Chemistry, AS CR, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
| | - Zbynek Pientka
- Institute of Macromolecular Chemistry, AS CR, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
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Aliyev EM, Khan MM, Nabiyev AM, Alosmanov RM, Bunyad-zadeh IA, Shishatskiy S, Filiz V. Covalently Modified Graphene Oxide and Polymer of Intrinsic Microporosity (PIM-1) in Mixed Matrix Thin-Film Composite Membranes. Nanoscale Res Lett 2018; 13:359. [PMID: 30421344 PMCID: PMC6232192 DOI: 10.1186/s11671-018-2771-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 10/24/2018] [Indexed: 05/15/2023]
Abstract
In this study, mixed matrix membranes (MMMs) consisting of graphene oxide (GO) and functionalized graphene oxide (FGO) incorporated in a polymer of intrinsic microporosity (PIM-1) serving as a polymer matrix have been fabricated by dip-coating method, and their single gas transport properties were investigated. Successfully surface-modified GOs were characterized by Fourier transform infrared spectroscopy (FTIR), UV-Vis spectroscopy, Raman spectroscopy, scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The effect of FGO loading on MMM morphology and performance was investigated by varying the FGO content in polymer matrix from 9 to 84 wt.%. Use of high FGO content in the polymer matrix helped to reveal difference in interaction of functionalized fillers with PIM-1 and even to discuss the change of FGO stiffness and filler alignment to the membrane surface depending on functional group nature.
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Affiliation(s)
- Elvin M. Aliyev
- Helmholtz-Zentrum Geesthacht, Institute of Polymer Research, Max-Planck-Str. 1, 21502 Geesthacht, Germany
- Baku State University, Z. Khalilov str. 23, AZ 1148 Baku, Azerbaijan
| | - Muntazim Munir Khan
- Helmholtz-Zentrum Geesthacht, Institute of Polymer Research, Max-Planck-Str. 1, 21502 Geesthacht, Germany
| | - Afig M. Nabiyev
- Baku State University, Z. Khalilov str. 23, AZ 1148 Baku, Azerbaijan
| | | | | | - Sergey Shishatskiy
- Helmholtz-Zentrum Geesthacht, Institute of Polymer Research, Max-Planck-Str. 1, 21502 Geesthacht, Germany
| | - Volkan Filiz
- Helmholtz-Zentrum Geesthacht, Institute of Polymer Research, Max-Planck-Str. 1, 21502 Geesthacht, Germany
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Sen M, Dana K, Das N. Development of LTA zeolite membrane from clay by sonication assisted method at room temperature for H 2-CO 2 and CO 2-CH 4 separation. Ultrason Sonochem 2018; 48:299-310. [PMID: 30080554 DOI: 10.1016/j.ultsonch.2018.06.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 05/18/2018] [Accepted: 06/13/2018] [Indexed: 06/08/2023]
Abstract
In this work, sodium aluminosilicate zeolite powder and membranes were synthesized by ultrasonic irradiation at room temperature using montmorillonite clay as precursor material. For comparison, same zeolite powder and membranes were synthesized at 100 °C also. The synthesized zeolites were characterized by X-ray diffraction (XRD), infrared (IR) spectral analysis, and field-emission scanning electron microscopy (FESEM). XRD and IR results showed that phase pure mainly LTA phase was formed after 15 days of aging at room temperature. By using the zeolite powders as seeds, membranes were synthesized on clay alumina support tubes at room temperature and also at 100 °C. In both the cases membranes were formed on support surface. The membrane thickness was found to be 15 μm. The performances of the membranes were evaluated by single gas as well as mixture gas permeation measurement for H2-CO2 and CO2-CH4 respectively. The H2-CO2 and CO2-CH4 separation selectivity for the mixture gas of the membrane was found to 16.2 and 20.9 at room temperature respectively. To the best of our knowledge, there is no report of synthesis of zeolite membrane at room temperature using clay as raw materials. For the first time we have reported the synthesis of alumino-silicate zeolite membrane on clay alumina support surface using clay as starting material by sonochemical method at room temperature.
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Affiliation(s)
- Mitali Sen
- Ceramic Membrane Division, CSIR-Central Glass & Ceramic Research Institute, Kolkata 700 032, India
| | - Kausik Dana
- Clay and Traditional Ceramics Division, CSIR-Central Glass & Ceramic Research Institute, Kolkata 700 032, India
| | - Nandini Das
- Ceramic Membrane Division, CSIR-Central Glass & Ceramic Research Institute, Kolkata 700 032, India.
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Galli F, Previtali D, Bozzano G, Bianchi CL, Manenti F, Pirola C. Production and application of O 2 enriched air produced by fresh and salt water desorption in chemical plants. J Environ Manage 2018; 217:621-628. [PMID: 29649734 DOI: 10.1016/j.jenvman.2018.03.133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 02/23/2018] [Accepted: 03/31/2018] [Indexed: 06/08/2023]
Abstract
Oxygen enriched air intensifies oxidation processes since smaller reactors reach the same conversion of typical unit operations that employ simple air as reactant. However, the cost to produce pure oxygen or oxygen enriched air with traditional methods, i.e. cryogenic separation or membrane technologies, may be unaffordable. Here, we propose a new continuous technology for gas mixture separation, focusing on the production of oxygen enriched air as a case study. This operation is an absorption-desorption process that takes advantage of the higher oxygen solubility in water compared to nitrogen. In a pressurized solubilisation tank, water absorbs air. Subsequently, reducing pressure desorbs oxygen enriched air. PRO/II 9.3 (Simsci-Scheider Electrics) simulated, optimized, and calculated the capital and operative expenses of this technology. Moreover, we tested for the first time salt water instead of distilled water as appealing possibility for chemical plant near sea and ocean. We varied the inlet water flowrate between 5 and 15 m3/h. The optimum operative absortion unit pressure is 15-35 barg. After degassing, water may be recycled. With salt water, the extracted quantity of enriched air decreases compared with the desorption from fresh water (20% less), while the concentration of oxygen is independent from the salt concentration. The cost of enriched air at the optimum condition is 2-3.35 EUR/Nm3.
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Affiliation(s)
- F Galli
- Department of Chemical Engineering, École Polytechnique de Montréal, Montreal, Quebec H3C3A7, Canada
| | - D Previtali
- Politecnico di Milano, Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Piazza Leonardo da Vinci 32, 20133, Milano, Italy
| | - G Bozzano
- Politecnico di Milano, Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Piazza Leonardo da Vinci 32, 20133, Milano, Italy
| | - C L Bianchi
- Università di Milano, Dipartimento di Chimica, via Golgi, 19, 20133, Milano, Italy
| | - F Manenti
- Politecnico di Milano, Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Piazza Leonardo da Vinci 32, 20133, Milano, Italy
| | - C Pirola
- Università di Milano, Dipartimento di Chimica, via Golgi, 19, 20133, Milano, Italy.
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Giel V, Perchacz M, Kredatusová J, Pientka Z. Gas Transport Properties of Polybenzimidazole and Poly(Phenylene Oxide) Mixed Matrix Membranes Incorporated with PDA-Functionalised Titanate Nanotubes. Nanoscale Res Lett 2017; 12:3. [PMID: 28050877 PMCID: PMC5215249 DOI: 10.1186/s11671-016-1613-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2016] [Accepted: 09/05/2016] [Indexed: 06/06/2023]
Abstract
Functionalised titanate nanotubes (TiNTs) were incorporated to poly(5,5-bisbenzimidazole-2,2-diyl-1,3-phenylene) (PBI) or poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) for improving the interfacial compatibility between the polymer matrix and inorganic material and for altering the gas separation performance of the neat polymer membranes. Functionalisation consisted in oxidative polymerisation of dopamine-hydrochloride on the surface of non-functionalised TiNTs. Transmission electron microscopy (TEM) confirmed that a thin polydopamine (PDA) layer was created on the surface of TiNTs. 1.5, 3, 6, and 9 wt.% of PDA-functionalised TiNTs (PDA-TiNTs) were dispersed to each type of polymer matrix to create so-called mixed matrix membranes (MMMs). Infrared spectroscopy confirmed that -OH and -NH groups exist on the surface of PDA-TiNTs and that the nanotubes interact via H-bonding with PBI but not with PPO. The distribution of PDA-TiNTs in the MMMs was to some extent uniform as scanning electron microscope (SEM) studies showed. Beyond, PDA-TiNTs exhibit positive effect on gas transport properties, resulting in increased selectivities of MMMs. The addition of nanotubes caused a decrease in permeabilities but an increase in selectivities. It is shown that 9 wt.% of PDA-TiNTs in PBI gave a rise to CO2/N2 and CO2/CH4 selectivities of 112 and 63 %, respectively. In case of PPO-PDA-TiNT MMMs, CO2/N2 and CO2/CH4 selectivity increased about 25 and 17 %, respectively. Sorption measurement showed that the presence of PDA-TiNTs in PBI caused an increase in CO2 sorption, whereas the influence on other gases is less noticeable.
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Affiliation(s)
- V. Giel
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq. 2, 16206 Prague 6, Czech Republic
| | - M. Perchacz
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq. 2, 16206 Prague 6, Czech Republic
| | - J. Kredatusová
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq. 2, 16206 Prague 6, Czech Republic
| | - Z. Pientka
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq. 2, 16206 Prague 6, Czech Republic
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Xu J, Sang P, Xing W, Shi Z, Zhao L, Guo W, Yan Z. Insights into the H2/CH4 Separation Through Two-Dimensional Graphene Channels: Influence of Edge Functionalization. Nanoscale Res Lett 2015; 10:492. [PMID: 26698875 PMCID: PMC4689719 DOI: 10.1186/s11671-015-1199-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 12/14/2015] [Indexed: 06/05/2023]
Abstract
A molecular simulation technique is employed to investigate the transport of H2/CH4 mixture through the two-dimensional (2D) channel between adjacent graphene layers. Pristine graphene membrane (GM) with pore width of 0.515~0.6 nm is found to only allow H2 molecules to enter rather than CH4, forming a molecular sieve. At pore widths of 0.64~1.366 nm, both H2 and CH4 molecules could fill into the GM channel, where the permeability of methane is more preferential than that of hydrogen with the largest CH4/H2 selectivity (1.89) at 0.728 nm. The edge functionalization by -H, -F, -OH, -NH2, and -COOH groups could significantly alter gas permeability by modifying the active surface area of the pore and tuning attractive and/or repulsive interaction with molecules at the entrance of channel. At the pore width of 0.6 nm, the H2 permeability of molecular sieve is enhanced by -H, -F, and -OH groups but restrained by -NH2, especially -COOH with a passing rate of zero. At pore widths of 0.64 and 0.728 nm, both -H and -F edge-functionalized GMs show a preferential selectivity of methane over hydrogen, while the favorable transport for GM-OH is changed from H2 molecules at 0.64 nm to CH4 molecules at 0.728 nm. For GM-NH2, it exhibits an excellent hydrogen molecular sieve at 0.64 nm and then turns into a significant H2/CH4 selectivity at 0.728 nm. Meanwhile, small H2 molecules start to enter the channel of GM-COOH at the pore width up to 0.728 nm. For the largest pore width of 1.336 nm, the influence of edge functionalization becomes small, and a comparable CH4/H2 selectivity is observed for all the considered membranes.
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Affiliation(s)
- Jing Xu
- College of Science, China University of Petroleum, Qingdao, Shandong, 266580, People's Republic of China
| | - Pengpeng Sang
- College of Science, China University of Petroleum, Qingdao, Shandong, 266580, People's Republic of China
| | - Wei Xing
- College of Science, China University of Petroleum, Qingdao, Shandong, 266580, People's Republic of China
| | - Zemin Shi
- College of Science, China University of Petroleum, Qingdao, Shandong, 266580, People's Republic of China
| | - Lianming Zhao
- College of Science, China University of Petroleum, Qingdao, Shandong, 266580, People's Republic of China.
| | - Wenyue Guo
- College of Science, China University of Petroleum, Qingdao, Shandong, 266580, People's Republic of China
| | - Zifeng Yan
- State Key Laboratory of Heavy Oil Processing, Key Laboratory of Catalysis, China University of Petroleum, Qingdao, 266580, People's Republic of China.
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