1
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Shen J, Kumar A, Wahiduzzaman M, Barpaga D, Maurin G, Motkuri RK. Engineered Nanoporous Frameworks for Adsorption Cooling Applications. Chem Rev 2024; 124:7619-7673. [PMID: 38683669 DOI: 10.1021/acs.chemrev.3c00450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
The energy demand for traditional vapor-compressed technology for space cooling continues to soar year after year due to global warming and the increasing human population's need to improve living and working conditions. Thus, there is a growing demand for eco-friendly technologies that use sustainable or waste energy resources. This review discusses the properties of various refrigerants used for adsorption cooling applications followed by a brief discussion on the thermodynamic cycle. Next, sorbents traditionally used for cooling are reviewed to emphasize the need for advanced capture materials with superior properties to improve refrigerant sorption. The remainder of the review focus on studies using engineered nanoporous frameworks (ENFs) with various refrigerants for adsorption cooling applications. The effects of the various factors that play a role in ENF-refrigerant pair selection, including pore structure/dimension/shape, morphology, open-metal sites, pore chemistry and possible presence of defects, are reviewed. Next, in-depth insights into the sorbent-refrigerant interaction, and pore filling mechanism gained through a combination of characterization techniques and computational modeling are discussed. Finally, we outline the challenges and opportunities related to using ENFs for adsorption cooling applications and provide our views on the future of this technology.
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Affiliation(s)
- Jian Shen
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, P.R. China
| | - Abhishek Kumar
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | | | - Dushyant Barpaga
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Guillaume Maurin
- ICGM, University of Montpellier, CNRS, ENSCM, 34293 Montpellier, France
| | - Radha Kishan Motkuri
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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2
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Zheng X, Chen L, Zhang H, Yao Z, Yang Y, Xiang F, Li Y, Xiang S, Zhang Z, Chen B. Optimized Sieving Effect for Ethanol/Water Separation by Ultramicroporous MOFs. Angew Chem Int Ed Engl 2023; 62:e202216710. [PMID: 36597172 DOI: 10.1002/anie.202216710] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 12/21/2022] [Accepted: 01/02/2023] [Indexed: 01/05/2023]
Abstract
High-purity ethanol is a promising renewable energy resource, however separating ethanol from trace amount of water is extremely challenging. Herein, two ultramicroporous MOFs (UTSA-280 and Co-squarate) were used as adsorbents. A prominent water adsorption and a negligible ethanol adsorption identify perfect sieving effect on both MOFs. Co-squarate exhibits a surprising water adsorption capacity at low pressure that surpassing the reported MOFs. Single crystal X-ray diffraction and theoretical calculations reveal that such prominent performance of Co-squarate derives from the optimized sieving effect through pore structure adjustment. Co-squarate with larger rhombohedral channel is suitable for zigzag water location, resulting in reinforced guest-guest and guest-framework interactions. Ultrapure ethanol (99.9 %) can be obtained directly by ethanol/water mixed vapor breaking through the columns packed with Co-squarate, contributing to a potential for fuel-grade ethanol purification.
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Affiliation(s)
- Xiaoqing Zheng
- College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, China.,College of Engineering, Fujian Jiangxia University, Fuzhou, 350108, China
| | - Liangji Chen
- College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, China
| | - Hao Zhang
- College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, China
| | - Zizhu Yao
- College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, China
| | - Yisi Yang
- College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, China
| | - Fahui Xiang
- College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, China
| | - Yunbin Li
- College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, China
| | - Shengchang Xiang
- College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, China
| | - Zhangjing Zhang
- College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, China
| | - Banglin Chen
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249-0698, USA
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3
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A contemporary report on explications of flexible metal-organic frameworks with regards to structural simulation, dynamics and material applications. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.116041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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4
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Mendoza Merlano CJ, Zepeda TA, Alonso-Nuñez G, Diaz de Leon JN, Manrique C, Echavarría Isaza A. Effect of crystal size on the acidity of nanometric Y zeolite: number of sites, strength, acid nature, and dehydration of 2-propanol. NEW J CHEM 2022. [DOI: 10.1039/d2nj01530g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Crystallinity damage in acid Y zeolite affects the direct relationship between the number of acid sites or conversion of 2-propanol and the zeolite size and the selectivity of 2-propene in nanosized Y zeolite.
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Affiliation(s)
- C. J. Mendoza Merlano
- Universidad de Antioquia, Grupo Catalizadores y Adsorbentes, Calle 70 No. 52-21, Medellín, Colombia
| | - T. A. Zepeda
- Universidad Nacional Autónoma de México, Centro de Nanociencias y Nanotecnología(CNyN), Km. 107 Carretera Tijuana-Ensenada Col. Pedregal Playitas, C.P. 22860, Ensenada, Baja California, Mexico
| | - G. Alonso-Nuñez
- Universidad Nacional Autónoma de México, Centro de Nanociencias y Nanotecnología(CNyN), Km. 107 Carretera Tijuana-Ensenada Col. Pedregal Playitas, C.P. 22860, Ensenada, Baja California, Mexico
| | - J. Noe Diaz de Leon
- Universidad Nacional Autónoma de México, Centro de Nanociencias y Nanotecnología(CNyN), Km. 107 Carretera Tijuana-Ensenada Col. Pedregal Playitas, C.P. 22860, Ensenada, Baja California, Mexico
| | - C. Manrique
- Universidad de Antioquia, Grupo Catalizadores y Adsorbentes, Calle 70 No. 52-21, Medellín, Colombia
| | - A. Echavarría Isaza
- Universidad de Antioquia, Grupo Catalizadores y Adsorbentes, Calle 70 No. 52-21, Medellín, Colombia
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Krishna R, van Baten JM. How Reliable Is the Ideal Adsorbed Solution Theory for the Estimation of Mixture Separation Selectivities in Microporous Crystalline Adsorbents? ACS OMEGA 2021; 6:15499-15513. [PMID: 34151128 PMCID: PMC8210411 DOI: 10.1021/acsomega.1c02136] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 05/25/2021] [Indexed: 06/13/2023]
Abstract
Microporous crystalline adsorbents such as zeolites and metal-organic frameworks (MOFs) have potential use in a wide variety of separation applications. The adsorption selectivity S ads is a key metric that quantifies the efficacy of any microporous adsorbent in mixture separations. The Ideal Adsorbed Solution Theory (IAST) is commonly used for estimating the value of S ads, with unary isotherms of the constituent guests as data inputs. There are two basic tenets underlying the development of the IAST. The first tenet mandates a homogeneous distribution of adsorbates within the pore landscape. The second tenet requires the surface area occupied by a guest molecule in the mixture to be the same as that for the corresponding pure component. Configurational-bias Monte Carlo (CBMC) simulations are employed in this article to highlight several scenarios in which the IAST fails to provide a quantitatively correct description of mixture adsorption equilibrium due to a failure to conform to either of the two tenets underpinning the IAST. For CO2 capture with cation-exchanged zeolites and MOFs with open metal sites, there is congregation of CO2 around the cations and unsaturated metal atoms, resulting in failure of the IAST due to an inhomogeneous distribution of adsorbates in the pore space. Thermodynamic non-idealities also arise due to the preferential location of CO2 molecules at the window regions of 8-ring zeolites such as DDR and CHA or within pockets of MOR and AFX zeolites. Thermodynamic non-idealities are evidenced for water/alcohol mixtures due to molecular clustering engendered by hydrogen bonding. It is also demonstrated that thermodynamic non-idealities can be strong enough to cause selectivity reversals, which are not anticipated by the IAST.
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Krishna R, van Baten JM. Water/Alcohol Mixture Adsorption in Hydrophobic Materials: Enhanced Water Ingress Caused by Hydrogen Bonding. ACS OMEGA 2020; 5:28393-28402. [PMID: 33163823 PMCID: PMC7643331 DOI: 10.1021/acsomega.0c04491] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Accepted: 10/09/2020] [Indexed: 06/11/2023]
Abstract
Microporous crystalline porous materials such as zeolites, metal-organic frameworks, and zeolitic imidazolate frameworks (ZIFs) have potential use for separating water/alcohol mixtures in fixed bed adsorbers and membrane permeation devices. For recovery of alcohols present in dilute aqueous solutions, the adsorbent materials need to be hydrophobic in order to prevent the ingress of water. The primary objective of this article is to investigate the accuracy of ideal adsorbed solution theory (IAST) for prediction of water/alcohol mixture adsorption in hydrophobic adsorbents. For this purpose, configurational bias Monte Carlo (CBMC) simulations are used to determine the component loadings for adsorption equilibrium of water/methanol and water/ethanol mixtures in all-silica zeolites (CHA, DDR, and FAU) and ZIF-8. Due to the occurrence of strong hydrogen bonding between water and alcohol molecules and attendant clustering, IAST fails to provide quantitative estimates of the component loadings and the adsorption selectivity. For a range of operating conditions, the water loading in the adsorbed phase may exceed that of pure water by one to two orders of magnitude. Furthermore, the occurrence of water-alcohol clusters moderates size entropy effects that prevail under pore saturation conditions. For quantitative modeling of the CBMC, simulated data requires the application of real adsorbed solution theory by incorporation of activity coefficients, suitably parameterized by the Margules model for the excess Gibbs free energy of adsorption.
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Abstract
Nerve agents (NAs) are a group of highly toxic organophosphorus compounds developed before World War II. They are related to organophosphorus pesticides, although they have much higher human acute toxicity than commonly used pesticides. After the detection of the presence of NAs, the critical step is the fast decontamination of the environment in order to avoid the lethal effect of these organophosphorus compounds on exposed humans. This review collects the catalytic degradation reactions of NAs, in particular focusing our attention on chemical hydrolysis. These reactions are catalyzed by different catalyst categories (metal-based, polymeric, heterogeneous, enzymatic and MOFs), all of them described in this review.
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Cheng YH, Barpaga D, Soltis JA, Shutthanandan V, Kargupta R, Han KS, McGrail BP, Motkuri RK, Basuray S, Chatterjee S. Metal-Organic Framework-Based Microfluidic Impedance Sensor Platform for Ultrasensitive Detection of Perfluorooctanesulfonate. ACS APPLIED MATERIALS & INTERFACES 2020; 12:10503-10514. [PMID: 32031779 DOI: 10.1021/acsami.9b22445] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The growing global concerns to public health from human exposure to perfluorooctanesulfonate (PFOS) require rapid, sensitive, in situ detection where current, state-of-the-art techniques are yet to adequately meet sensitivity standards of the real world. This work presents, for the first time, a synergistic approach for the targeted affinity-based capture of PFOS using a porous sorbent probe that enhances detection sensitivity by embedding it on a microfluidic platform. This novel sorbent-containing platform functions as an electrochemical sensor to directly measure PFOS concentration through a proportional change in electrical current (increase in impedance). The extremely high surface area and pore volume of mesoporous metal-organic framework (MOF) Cr-MIL-101 is used as the probe for targeted PFOS capture based on the affinity of the chromium center toward both the fluorine tail groups as well as the sulfonate functionalities as demonstrated by spectroscopic (NMR and XPS) and microscopic (TEM) studies. Answering the need for an ultrasensitive PFOS detection technique, we are embedding the MOF capture probes inside a microfluidic channel, sandwiched between interdigitated microelectrodes (IDμE). The nanoporous geometry, along with interdigitated microelectrodes, increases the signal-to-noise ratio tremendously. Further, the ability of the capture probes to interact with the PFOS at the molecular level and effectively transduce that response electrochemically has allowed us achieve a significant increase in sensitivity. The PFOS detection limit of 0.5 ng/L is unprecedented for in situ analytical PFOS sensors and comparable to quantification limits achieved using state-of-the-art ex situ techniques.
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Affiliation(s)
- Yu H Cheng
- Department of Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, New Jersey 07102, United States
| | - Dushyant Barpaga
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Jennifer A Soltis
- National Security Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - V Shutthanandan
- Environmental and Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Roli Kargupta
- Department of Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, New Jersey 07102, United States
| | - Kee Sung Han
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - B Peter McGrail
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Radha Kishan Motkuri
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Sagnik Basuray
- Department of Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, New Jersey 07102, United States
| | - Sayandev Chatterjee
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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Sabale S, Barpaga D, Yao J, Kovarik L, Zhu Z, Chatterjee S, McGrail BP, Motkuri RK, Yu XY. Understanding Time Dependence on Zinc Metal-Organic Framework Growth Using in Situ Liquid Secondary Ion Mass Spectrometry. ACS APPLIED MATERIALS & INTERFACES 2020; 12:5090-5098. [PMID: 31891475 DOI: 10.1021/acsami.9b19991] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The abundance of novel metal-organic framework (MOF) materials continues to increase as more applications are discovered for these highly porous, well-ordered crystalline structures. The simplicity of constituents allows for the design of new MOFs with virtue of functionality and pore topology toward target adsorbates. However, the fundamental understanding of how these frameworks evolve during nucleation and growth is mostly limited to speculation from simulation studies. In this effort, we utilize a unique vacuum compatible system for analysis at the liquid vacuum interface (SALVI) microfluidic interface to analyze the formation and evolution of the benchmark MOF-74 framework using time-of-flight secondary ion mass spectrometry (ToF-SIMS). Principal component analysis of the SIMS mass spectra, together with ex situ electron microscopy, powder X-ray diffractometry, and porosimetry, provides new insights into the structural growth, metal-oxide cluster formation, and aging process of Zn-MOF-74. Samples collected over a range of synthesis times and analyzed closely with in situ ToF-SIMS, transmission electron microscopy, and gas adsorption studies verify the developing pore structure during the aging process.
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Affiliation(s)
- Sandip Sabale
- Energy and Environment Directorate , Pacific Northwest National Laboratory (PNNL) , Richland , Washington 99354 , United States
- Department of Chemistry , Jaysingpur College, Jaysingpur (Shivaji University) , Jaysingpur , 416101 Maharashtra , India
| | - Dushyant Barpaga
- Energy and Environment Directorate , Pacific Northwest National Laboratory (PNNL) , Richland , Washington 99354 , United States
| | - Jennifer Yao
- Energy and Environment Directorate , Pacific Northwest National Laboratory (PNNL) , Richland , Washington 99354 , United States
| | - Libor Kovarik
- Environmental Molecular Science Laboratory (EMSL) , Pacific Northwest National Laboratory (PNNL) , Richland , Washington 99354 , United States
| | - Zihua Zhu
- Environmental Molecular Science Laboratory (EMSL) , Pacific Northwest National Laboratory (PNNL) , Richland , Washington 99354 , United States
| | - Sayandev Chatterjee
- Energy and Environment Directorate , Pacific Northwest National Laboratory (PNNL) , Richland , Washington 99354 , United States
| | - B Peter McGrail
- Energy and Environment Directorate , Pacific Northwest National Laboratory (PNNL) , Richland , Washington 99354 , United States
| | - Radha Kishan Motkuri
- Energy and Environment Directorate , Pacific Northwest National Laboratory (PNNL) , Richland , Washington 99354 , United States
| | - Xiao-Ying Yu
- Energy and Environment Directorate , Pacific Northwest National Laboratory (PNNL) , Richland , Washington 99354 , United States
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10
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Hazra A, van Heerden DP, Sanyal S, Lama P, Esterhuysen C, Barbour LJ. CO 2-induced single-crystal to single-crystal transformations of an interpenetrated flexible MOF explained by in situ crystallographic analysis and molecular modeling. Chem Sci 2019; 10:10018-10024. [PMID: 32015814 PMCID: PMC6977545 DOI: 10.1039/c9sc04043a] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 09/06/2019] [Indexed: 12/24/2022] Open
Abstract
A molecular-level investigation is reported on breathing behaviour of a metal-organic framework (1) in response to CO2 gas pressure. High-pressure gas adsorption shows a pronounced step corresponding to a gate-opening phase transformation from a closed (1cp ) to a large-pore (1lp ) form. A plateau is observed upon desorption corresponding to narrow-pore intermediate form 1np which does not occur during adsorption. These events are corroborated by pressure-gradient differential scanning calorimetry and in situ single-crystal X-ray diffraction analysis under controlled CO2 gas pressure. Complete crystallographic characterisation facilitated a rationalisation of each phase transformation in the series 1cp → 1lp → 1np → 1cp during adsorption and subsequent desorption. Metropolis grand-canonical Monte Carlo simulations and DFT-PBE-D3 interaction energy calculations strongly underpin this first detailed structural investigation of an intermediate phase encountered upon desorption.
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Affiliation(s)
- Arpan Hazra
- Department of Chemistry and Polymer Science , University of Stellenbosch , Matieland , 7600 , South Africa .
| | - Dewald P van Heerden
- Department of Chemistry and Polymer Science , University of Stellenbosch , Matieland , 7600 , South Africa .
| | - Somananda Sanyal
- Department of Chemistry and Polymer Science , University of Stellenbosch , Matieland , 7600 , South Africa .
| | - Prem Lama
- Department of Chemistry and Polymer Science , University of Stellenbosch , Matieland , 7600 , South Africa .
| | - Catharine Esterhuysen
- Department of Chemistry and Polymer Science , University of Stellenbosch , Matieland , 7600 , South Africa .
| | - Leonard J Barbour
- Department of Chemistry and Polymer Science , University of Stellenbosch , Matieland , 7600 , South Africa .
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Tang Y, Dubbeldam D, Tanase S. Water-Ethanol and Methanol-Ethanol Separations Using in Situ Confined Polymer Chains in a Metal-Organic Framework. ACS APPLIED MATERIALS & INTERFACES 2019; 11:41383-41393. [PMID: 31600050 PMCID: PMC6838788 DOI: 10.1021/acsami.9b14367] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 10/10/2019] [Indexed: 06/10/2023]
Abstract
This study presents a straightforward approach for the in situ polymerization of poly(N-isopropylacrylamide) (PNIPAM) chains within the one-dimensional (1D) pores of the five-coordinated zinc-based metal-organic framework DMOF in order to obtain new MOF-based composites. The loading amount of PNIPAM within DMOF ⊃ PNIPAM composites can be tuned by changing the initial weight ratio between NIPAM, which is the monomer of PNIPAM, and DMOF. The guest PNIPAM chains in the composites block partially the 1D pores of DMOF, thus leading to a narrowed nanospace. The water adsorption studies reveal that the water uptake increased by increasing the loading of PNIPAM in the final DMOF ⊃ PNIPAM composites, indicating that the exposed amide groups of PNIPAM gradually alter the hydrophobicity of pristine DMOF and lead to hydrophilic DMOF ⊃ PNIPAM composites. The composite with the highest loading of PNIPAM displays a selective adsorption for water and methanol over ethanol when using equimolar mixtures of methanol-ethanol and water-ethanol. This is confirmed by the single-component adsorption measurements as well as ideal adsorbed solution theory molecular simulations. Additionally, the water stability of pristine DMOF has been greatly improved after the incorporation of PNIPAM in its pores. PNIPAM can undergo a phase transition between hydrophobic and hydrophilic phases in response to a low temperature change. This property is used in order to control the desorption of water and methanol molecules, thus enabling an efficient and cost-effective regeneration process.
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12
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Barpaga D, Nguyen VT, Medasani BK, Chatterjee S, McGrail BP, Motkuri RK, Dang LX. Insight into Fluorocarbon Adsorption in Metal-Organic Frameworks via Experiments and Molecular Simulations. Sci Rep 2019; 9:10289. [PMID: 31311953 PMCID: PMC6635433 DOI: 10.1038/s41598-019-46269-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Accepted: 05/10/2019] [Indexed: 02/02/2023] Open
Abstract
The improvement in adsorption/desorption of hydrofluorocarbons has implications for many heat transformation applications such as cooling, refrigeration, heat pumps, power generation, etc. The lack of chlorine in hydrofluorocarbons minimizes the lasting environmental damage to the ozone, with R134a (1,1,1,2-tetrafluoroethane) being used as the primary industrial alternative to commonly used Freon-12. The efficacy of novel adsorbents used in conjunction with R134a requires a deeper understanding of the host-guest chemical interaction. Metal-organic frameworks (MOFs) represent a newer class of adsorbent materials with significant industrial potential given their high surface area, porosity, stability, and tunability. In this work, we studied two benchmark MOFs, a microporous Ni-MOF-74 and mesoporous Cr-MIL-101. We employed a combined experimental and simulation approach to study the adsorption of R134a to better understand host-guest interactions using equilibrium isotherms, enthalpy of adsorption, Henry’s coefficients, and radial distribution functions. The overall uptake was shown to be exceptionally high for Cr-MIL-101, >140 wt% near saturation while >50 wt% at very low partial pressures. For both MOFs, simulation data suggest that metal sites provide preferable adsorption sites for fluorocarbon based on favorable C-F ··· M+ interactions between negatively charged fluorine atoms of R134a and positively charged metal atoms of the MOF framework.
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Affiliation(s)
- Dushyant Barpaga
- Energy and Environment Directorate, Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA, 99352, USA
| | - Van T Nguyen
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA, 99352, USA
| | - Bharat K Medasani
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA, 99352, USA
| | - Sayandev Chatterjee
- Energy and Environment Directorate, Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA, 99352, USA
| | - B Peter McGrail
- Energy and Environment Directorate, Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA, 99352, USA
| | - Radha Kishan Motkuri
- Energy and Environment Directorate, Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA, 99352, USA.
| | - Liem X Dang
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA, 99352, USA.
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13
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Barpaga D, Zheng J, Han KS, Soltis JA, Shutthanandan V, Basuray S, McGrail BP, Chatterjee S, Motkuri RK. Probing the Sorption of Perfluorooctanesulfonate Using Mesoporous Metal–Organic Frameworks from Aqueous Solutions. Inorg Chem 2019; 58:8339-8346. [DOI: 10.1021/acs.inorgchem.9b00380] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Dushyant Barpaga
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Jian Zheng
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Kee Sung Han
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Jennifer A. Soltis
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Vaithiyalingam Shutthanandan
- Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Sagnik Basuray
- Department of Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, New Jersey 07102, United States
| | - B. Peter McGrail
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Sayandev Chatterjee
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Radha Kishan Motkuri
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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14
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Krishna R. Elucidation and characterization of entropy effects in mixture separations with micro-porous crystalline adsorbents. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.01.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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15
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Mukherjee S, Desai AV, Ghosh SK. Potential of metal–organic frameworks for adsorptive separation of industrially and environmentally relevant liquid mixtures. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.04.001] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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17
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Liu J, Zheng J, Barpaga D, Sabale S, Arey B, Derewinski MA, McGrail BP, Motkuri RK. A Tunable Bimetallic MOF‐74 for Adsorption Chiller Applications. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800042] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jian Liu
- Pacific Northwest National Laboratory 99352 Richland WA USA
| | - Jian Zheng
- Pacific Northwest National Laboratory 99352 Richland WA USA
| | | | - Sandip Sabale
- Pacific Northwest National Laboratory 99352 Richland WA USA
- P.G. Department of Chemistry Jaysingpur College 416101 Jaysingpur Maharashtra India
| | - Bruce Arey
- Environmental Molecular Sciences Laboratory (EMSL) Pacific Northwest National Laboratory 99352 Richland WA USA
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Ding JJ, Zhu J, Li YX, Liu XQ, Sun LB. Smart Adsorbents Functionalized with Thermoresponsive Polymers for Selective Adsorption and Energy-Saving Regeneration. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b00582] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Jia-Jia Ding
- Jiangsu National Synergetic Innovation
Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented
Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Jing Zhu
- Jiangsu National Synergetic Innovation
Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented
Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Yu-Xia Li
- Jiangsu National Synergetic Innovation
Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented
Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Xiao-Qin Liu
- Jiangsu National Synergetic Innovation
Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented
Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Lin-Bing Sun
- Jiangsu National Synergetic Innovation
Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented
Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
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19
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Mikhalyova EA, Trofimenko S, Zeller M, Addison AW, Pavlishchuk VV. New homodinuclear tris(3-alkylpyrazolyl)borate complexes of Co II and Ni II with a tetraacetylethane dianion as a bridging ligand. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2016; 72:777-785. [PMID: 27811411 DOI: 10.1107/s205322961601398x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 09/01/2016] [Indexed: 11/10/2022]
Abstract
Polynuclear complexes and coordination polymers of 3d metals have attracted significant interest evoked by a number of their unique properties. One of the most common approaches to the directed synthesis of coordination polymers is the linking of pre-prepared discrete coordination units by polydentate ligands. The formation of polynuclear complexes is usually a spontaneous process and precise prediction of the products of such reactions is virtually impossible in most cases. Tris(pyrazolyl)borates (Tp) act as tripodal `capping' ligands which form stable complexes with 3d metal ions. In such 1:1 compounds, three metal-ion coordination sites are occupied by N atoms from a Tp anion. This limits the number of remaining coordination sites, and thus the number of additional ligands which may coordinate, and opens an attractive approach for the directed design of desirable structures by exploiting ligands with appropriate composition and topology. In the present study, Tp anions with neopentyl [TpNp, tris(3-neopentylpyrazolyl)borate] and cyclohexyl [TpCy, tris(3-cyclohexylpyrazolyl)borate] substituents were used as `capping' ligands and the dianion of tetraacetylethane (3,4-diacetylhexa-2,4-diene-2,5-diolate, tae2-) was employed as a bridge. The dinuclear complexes (μ-3,4-diacetylhexa-2,4-diene-2,5-diolato-κ4O2,O3:O4,O5)bis{[tris(3-cyclohexyl-1H-pyrazol-1-yl-κN2)borato]cobalt(II)} acetonitrile disolvate, [Co2(C27H40BN6)2(C10H12O4)]·2CH3CN, (I)·2CH3CN, and (μ-3,4-diacetylhexa-2,4-diene-2,5-diolato-κ4O2,O3:O4,O5)bis{[tris(3-neopentyl-1H-pyrazol-1-yl-κN2)borato]nickel(II)}, [Ni2(C24H40BN6)2(C10H12O4)], (II), were synthesized by the reaction of the mononuclear complexes TpCyCoCl or TpNpNiCl with H2tae (3,4-diacetylhexane-2,5-dione or tetraacetylethane) in the presence of NEt3 as base. Compounds (I) and (II) were characterized by mass spectrometry, elemental analysis, and X-ray crystallography. They possess similar molecular structures, X-ray diffraction revealing them to be dinuclear in nature and composed of discrete Tp-M units in which two metal ions are linked by a tae2- dianion. Each metal ion possesses a five-coordinate square-pyramidal environment. The interplanar angles between the acetylacetonate fragments are significantly smaller than the near-90° values commonly observed.
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Affiliation(s)
- Elena A Mikhalyova
- L. V. Pisarzhevskii Institute of Physical Chemistry, National Academy of Sciences of the Ukraine, Prospekt Nauki 31, Kiev 03028, Ukraine
| | - Swiatoslaw Trofimenko
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA
| | - Matthias Zeller
- Department of Chemistry, Purdue University, 560 Oval Drive, W. Lafayette, IN 47907-2084, USA
| | - Anthony W Addison
- Chemistry Department, Drexel University, Philadelphia, PA 19104-2816, USA
| | - Vitaly V Pavlishchuk
- L. V. Pisarzhevskii Institute of Physical Chemistry, National Academy of Sciences of the Ukraine, Prospekt Nauki 31, Kiev 03028, Ukraine
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20
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Cheng L, Jiang Y, Yan N, Shan SF, Liu XQ, Sun LB. Smart Adsorbents with Photoregulated Molecular Gates for Both Selective Adsorption and Efficient Regeneration. ACS APPLIED MATERIALS & INTERFACES 2016; 8:23404-23411. [PMID: 27559985 DOI: 10.1021/acsami.6b07853] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Selective adsorption and efficient regeneration are two crucial issues for adsorption processes; unfortunately, only one of them instead of both is favored by traditional adsorbents with fixed pore orifices. Herein, we fabricated a new generation of smart adsorbents through grafting photoresponsive molecules, namely, 4-(3-triethoxysilylpropyl-ureido)azobenzene (AB-TPI), onto pore orifices of the support mesoporous silica. The azobenzene (AB) derivatives serve as the molecular gates of mesopores and are reversibly opened and closed upon light irradiation. Irradiation with visible light (450 nm) causes AB molecules to isomerize from cis to trans configuration, and the molecular gates are closed. It is easy for smaller adsorbates to enter while difficult for the larger ones, and the selective adsorption is consequently facilitated. Upon irradiation with UV light (365 nm), the AB molecules are transformed from trans to cis isomers, promoting the desorption of adsorbates due to the opened molecular gates. The present smart adsorbents can consequently benefit not only selective adsorption but also efficient desorption, which are exceedingly desirable for adsorptive separation but impossible for traditional adsorbents with fixed pore orifices.
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Affiliation(s)
- Lei Cheng
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University , Nanjing 210009, China
| | - Yao Jiang
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University , Nanjing 210009, China
| | - Ni Yan
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University , Nanjing 210009, China
| | - Shu-Feng Shan
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University , Nanjing 210009, China
| | - Xiao-Qin Liu
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University , Nanjing 210009, China
| | - Lin-Bing Sun
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University , Nanjing 210009, China
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21
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An Efficient Synthesis Strategy for Metal-Organic Frameworks: Dry-Gel Synthesis of MOF-74 Framework with High Yield and Improved Performance. Sci Rep 2016; 6:28050. [PMID: 27306598 PMCID: PMC4910056 DOI: 10.1038/srep28050] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 05/13/2016] [Indexed: 11/08/2022] Open
Abstract
Vapor-assisted dry-gel synthesis of the metal-organic framework-74 (MOF-74) structure, specifically Ni-MOF-74 produced from synthetic precursors using an organic-water hybrid solvent system, showed a very high yield (>90% with respect to 2,5-dihydroxyterepthalic acid) and enhanced performance. The Ni-MOF-74 obtained showed improved sorption characteristics towards CO2 and the refrigerant fluorocarbon dichlorodifluoromethane. Unlike conventional synthesis, which takes 72 hours using the tetrahydrofuran-water system, this kinetic study showed that Ni-MOF-74 forms within 12 hours under dry-gel conditions with similar performance characteristics, and exhibits its best performance characteristics even after 24 hours of heating. In the dry-gel conversion method, the physical separation of the solvent and precursor mixture allows for recycling of the solvent. We demonstrated efficient solvent recycling (up to three times) that resulted in significant cost benefits. The scaled-up manufacturing cost of Ni-MOF-74 synthesized via our dry-gel method is 45% of conventional synthesis cost. Thus, for bulk production of the MOFs, the proposed vapor-assisted, dry-gel method is efficient, simple, and inexpensive when compared to the conventional synthesis method.
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22
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Kim Y, Haldar R, Kim H, Koo J, Kim K. The guest-dependent thermal response of the flexible MOF Zn2(BDC)2(DABCO). Dalton Trans 2016; 45:4187-92. [DOI: 10.1039/c5dt03710g] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Zhu J, Tan P, Yang PP, Liu XQ, Jiang Y, Sun LB. Smart adsorbents with reversible photo-regulated molecular switches for selective adsorption and efficient regeneration. Chem Commun (Camb) 2016; 52:11531-11534. [DOI: 10.1039/c6cc06279b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new class of adsorbents with reversible photo-regulated molecular switches was fabricated and simultaneously realized selective adsorption and efficient regeneration.
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Affiliation(s)
- Jing Zhu
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemistry and Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
| | - Peng Tan
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemistry and Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
| | - Piao-Ping Yang
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemistry and Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
| | - Xiao-Qin Liu
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemistry and Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
| | - Yao Jiang
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemistry and Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
| | - Lin-Bing Sun
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemistry and Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
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24
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Prodinger S, Vemuri RS, Varga T, Peter McGrail B, Motkuri RK, Derewinski MA. Impact of chabazite SSZ-13 textural properties and chemical composition on CO2 adsorption applications. NEW J CHEM 2016. [DOI: 10.1039/c5nj03205a] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A narrow pore zeolite was synthesized with different Si/Al ratios and micro- to nanoparticle size where both played an important role in CO2 adsorption.
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Affiliation(s)
- Sebastian Prodinger
- Institute of Integrated Catalysis
- Physical Sciences Division
- Pacific Northwest National Laboratory (PNNL)
- Richland
- USA
| | - Rama S. Vemuri
- Hydrocarbon Processing Group
- Energy and Environment Directorate
- Pacific Northwest National Laboratory (PNNL)
- Richland
- USA
| | - Tamas Varga
- Environmental Molecular Sciences Laboratory
- Pacific Northwest National Laboratory (PNNL)
- Richland
- USA
| | - B. Peter McGrail
- Hydrocarbon Processing Group
- Energy and Environment Directorate
- Pacific Northwest National Laboratory (PNNL)
- Richland
- USA
| | - Radha Kishan Motkuri
- Hydrocarbon Processing Group
- Energy and Environment Directorate
- Pacific Northwest National Laboratory (PNNL)
- Richland
- USA
| | - Miroslaw A. Derewinski
- Institute of Integrated Catalysis
- Physical Sciences Division
- Pacific Northwest National Laboratory (PNNL)
- Richland
- USA
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25
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Zhu J, Ding JJ, Liu XQ, Tan P, Sun LB. Realizing both selective adsorption and efficient regeneration using adsorbents with photo-regulated molecular gates. Chem Commun (Camb) 2016; 52:4006-9. [DOI: 10.1039/c5cc10634f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new generation of adsorbents possessing photo-regulated molecular gates were fabricated and consequently, realized selective adsorption and efficient desorption simultaneously.
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Affiliation(s)
- Jing Zhu
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemistry and Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
| | - Jia-Jia Ding
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemistry and Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
| | - Xiao-Qin Liu
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemistry and Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
| | - Peng Tan
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemistry and Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
| | - Lin-Bing Sun
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemistry and Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
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26
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Jiang Y, Tan P, Cheng L, Shan SF, Liu XQ, Sun LB. Selective adsorption and efficient regeneration via smart adsorbents possessing thermo-controlled molecular switches. Phys Chem Chem Phys 2016; 18:9883-7. [DOI: 10.1039/c6cp00351f] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new generation of adsorbents possessing thermo-controlled molecular switches was fabricated and consequently realized selective adsorption and efficient desorption simultaneously.
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Affiliation(s)
- Yao Jiang
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemistry and Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
| | - Peng Tan
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemistry and Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
| | - Lei Cheng
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemistry and Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
| | - Shu-Feng Shan
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemistry and Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
| | - Xiao-Qin Liu
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemistry and Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
| | - Lin-Bing Sun
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemistry and Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
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27
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Gutiérrez-Sevillano JJ, Calero S, Krishna R. Separation of benzene from mixtures with water, methanol, ethanol, and acetone: highlighting hydrogen bonding and molecular clustering influences in CuBTC. Phys Chem Chem Phys 2015; 17:20114-24. [PMID: 26165859 DOI: 10.1039/c5cp02726h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Configurational-bias Monte Carlo (CBMC) simulations are used to establish the potential of CuBTC for separation of water/benzene, methanol/benzene, ethanol/benzene, and acetone/benzene mixtures. For operations under pore saturation conditions, the separations are in favor of molecules that partner benzene; this is due to molecular packing effects that disfavor benzene. CBMC simulations for adsorption of quaternary water/methanol/ethanol/benzene mixtures show that water can be selectively adsorbed at pore saturation, making CuBTC effective in drying applications. Ideal Adsorbed Solution Theory (IAST) calculations anticipate the right hierarchy of component loadings but the quantitative agreement with CBMC mixture simulations is poor for all investigated mixtures. The failure of the IAST to provide reasonable quantitative predictions of mixture adsorption is attributable to molecular clustering effects that are induced by hydrogen bonding between water-water, methanol-methanol, and ethanol-ethanol molecule pairs. There is, however, no detectable hydrogen bonding between benzene and partner molecules in the investigated mixtures. As a consequence of molecular clustering, the activity coefficients of benzene in the mixtures is lowered below unity by one to three orders of magnitude at pore saturation; such drastic reductions cannot be adequately captured by the Wilson model, that does not explicitly account for molecular clustering. Molecular clustering effects are also shown to influence the loading dependence of the diffusivities of guest molecules.
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Affiliation(s)
- Juan José Gutiérrez-Sevillano
- Department of Physical, Chemical and Natural Systems, University Pablo de Olavide, Ctra. Utrera km 1, 41013 Sevilla, Spain.
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