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Al Soubaihi RM, Saoud KM, Awadallah-F A, Elkhatat AM, Al-Muhtaseb SA, Dutta J. Investigation of palladium catalysts in mesoporous silica support for CO oxidation and CO 2 adsorption. Heliyon 2023; 9:e18354. [PMID: 37539214 PMCID: PMC10393765 DOI: 10.1016/j.heliyon.2023.e18354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 07/10/2023] [Accepted: 07/14/2023] [Indexed: 08/05/2023] Open
Abstract
The oxidation of Carbon monoxide (CO) to Carbon dioxide (CO2) is one of the most extensively investigated reactions in the field of heterogeneous catalysis, and it occurs via molecular rearrangements induced by catalytic metal atoms with oxygen intermediates. CO oxidation and CO2 capture are instrumental processes in the reduction of green-house gas emissions, both of which are used in low-temperature CO oxidation in the catalytic converters of vehicles. CO oxidation and CO2 adsorption at different temperatures are evaluated for palladium-supported silica aerogel (Pd/SiO2). The synthesized catalyst was active and stable for low-temperature CO oxidation. The catalytic activity was enhanced after the first cycle due to the reconditioning of the catalyst's pores. It was found that the presence of oxide forms of palladium in the SiO2 microstructure, influences the performance of the catalysts due to oxygen vacancies that increases the frequency of active sites. CO2 gas adsorption onto Pd/SiO2 was investigated at a wide-ranging temperature from 16 to 120 °C and pressures ∼1 MPa as determined from the isotherms that were evaluated, where CO2 showed the highest equilibrium adsorption capacity at 16 °C. The Langmuir model was employed to study the equilibrium adsorption behavior. Finally, the effect of moisture on CO oxidation and CO2 adsorption was considered to account for usage in real-world applications. Overall, mesoporous Pd/SiO2 aerogel shows potential as a material capable of removing CO from the environment and capturing CO2 at low temperatures.
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Affiliation(s)
- Rola Mohammad Al Soubaihi
- Functional NanoMaterials Group, Department of Applied Physics, School of Engineering Sciences, KTH Royal Institute of Technology, Hannes Alfvéns väg 12, 11419, Stockholm, Sweden
| | - Khaled Mohammad Saoud
- Virginia Commonwealth University in Qatar, Liberal Arts and Sciences Program, P.O. Box 8095, Doha, Qatar
| | - Ahmed Awadallah-F
- Department of Chemical Engineering, Qatar University, P.O. Box 2713, Doha, Qatar
| | | | | | - Joydeep Dutta
- Functional NanoMaterials Group, Department of Applied Physics, School of Engineering Sciences, KTH Royal Institute of Technology, Hannes Alfvéns väg 12, 11419, Stockholm, Sweden
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Di Luigi M, Guo Z, An L, Armstrong JN, Zhou C, Ren S. Manufacturing silica aerogel and cryogel through ambient pressure and freeze drying. RSC Adv 2022; 12:21213-21222. [PMID: 35975055 PMCID: PMC9341427 DOI: 10.1039/d2ra03325a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 07/09/2022] [Indexed: 11/21/2022] Open
Abstract
Achieving a mesoporous structure in superinsulation materials is pivotal for guaranteeing a harmonious relationship between low thermal conductivity, high porosity, and low density. Herein, we report silica-based cryogel and aerogel materials by implementing freeze-drying and ambient-pressure-drying processes respectively. The obtained freeze-dried cryogels yield thermal conductivity of 23 mW m−1 K−1, with specific surface area of 369.4 m2 g−1, and porosity of 96.7%, whereas ambient-pressure-dried aerogels exhibit thermal conductivity of 23.6 mW m−1 K−1, specific surface area of 473.8 m2 g−1, and porosity of 97.4%. In addition, the fiber-reinforced nanocomposites obtained via freeze-drying feature a low thermal conductivity (28.0 mW m−1 K−1) and high mechanical properties (∼620 kPa maximum compressive stress and Young's modulus of 715 kPa), coupled with advanced flame-retardant capabilities, while the composite materials from the ambient pressure drying process have thermal conductivity of 28.8 mW m−1 K−1, ∼200 kPa maximum compressive stress and Young's modulus of 612 kPa respectively. The aforementioned results highlight the capabilities of both drying processes for the development of thermal insulation materials for energy-efficient applications. Ambient pressure and freeze drying techniques enable silica aerogel and cryogel insulation composites.![]()
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Affiliation(s)
- Massimigliano Di Luigi
- Department of Mechanical and Aerospace Engineering, University at Buffalo, The State University of New York Buffalo 14260 New York USA
| | - Zipeng Guo
- Department of Industrial and Systems Engineering, University at Buffalo, The State University of New York Buffalo 14260 New York USA
| | - Lu An
- Department of Mechanical and Aerospace Engineering, University at Buffalo, The State University of New York Buffalo 14260 New York USA
| | - Jason N Armstrong
- Department of Mechanical and Aerospace Engineering, University at Buffalo, The State University of New York Buffalo 14260 New York USA
| | - Chi Zhou
- Department of Industrial and Systems Engineering, University at Buffalo, The State University of New York Buffalo 14260 New York USA
| | - Shenqiang Ren
- Department of Mechanical and Aerospace Engineering, University at Buffalo, The State University of New York Buffalo 14260 New York USA .,Department of Chemistry, University at Buffalo, The State University of New York Buffalo 14260 New York USA.,Research and Education in Energy, Environment & Water (RENEW), University at Buffalo, The State University of New York Buffalo 14260 New York USA
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Falua KJ, Pokharel A, Babaei-Ghazvini A, Ai Y, Acharya B. Valorization of Starch to Biobased Materials: A Review. Polymers (Basel) 2022; 14:polym14112215. [PMID: 35683888 PMCID: PMC9183024 DOI: 10.3390/polym14112215] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 05/11/2022] [Accepted: 05/17/2022] [Indexed: 12/17/2022] Open
Abstract
Many concerns are being expressed about the biodegradability, biocompatibility, and long-term viability of polymer-based substances. This prompted the quest for an alternative source of material that could be utilized for various purposes. Starch is widely used as a thickener, emulsifier, and binder in many food and non-food sectors, but research focuses on increasing its application beyond these areas. Due to its biodegradability, low cost, renewability, and abundance, starch is considered a "green path" raw material for generating porous substances such as aerogels, biofoams, and bioplastics, which have sparked an academic interest. Existing research has focused on strategies for developing biomaterials from organic polymers (e.g., cellulose), but there has been little research on its polysaccharide counterpart (starch). This review paper highlighted the structure of starch, the context of amylose and amylopectin, and the extraction and modification of starch with their processes and limitations. Moreover, this paper describes nanofillers, intelligent pH-sensitive films, biofoams, aerogels of various types, bioplastics, and their precursors, including drying and manufacturing. The perspectives reveal the great potential of starch-based biomaterials in food, pharmaceuticals, biomedicine, and non-food applications.
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Affiliation(s)
- Kehinde James Falua
- Department of Chemical and Biological Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7N 5A9, Canada; (K.J.F.); (A.P.); (A.B.-G.)
- Department of Agricultural & Biosystems Engineering, University of Ilorin, Ilorin PMB 1515, Nigeria
| | - Anamol Pokharel
- Department of Chemical and Biological Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7N 5A9, Canada; (K.J.F.); (A.P.); (A.B.-G.)
| | - Amin Babaei-Ghazvini
- Department of Chemical and Biological Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7N 5A9, Canada; (K.J.F.); (A.P.); (A.B.-G.)
| | - Yongfeng Ai
- Department of Food and Bioproduct Sciences, University of Saskatchewan, 51 Campus Drive, Saskatoon, SK S7N 5A8, Canada;
| | - Bishnu Acharya
- Department of Chemical and Biological Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7N 5A9, Canada; (K.J.F.); (A.P.); (A.B.-G.)
- Correspondence:
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Abstract
The rise of carbon dioxide (CO2) levels in the atmosphere emphasises the need for improving the current carbon capture and storage (CCS) technology. A conventional absorption method that utilises amine-based solvent is known to cause corrosion to process equipment. The solvent is easily degraded and has high energy requirement for regeneration. Amino acids are suitable candidates to replace traditional alkanolamines attributed to their identical amino functional group. In addition, amino acid salt is a green material due to its extremely low toxicity, low volatility, less corrosive, and high efficiency to capture CO2. Previous studies have shown promising results in CO2 capture using amino acids salts solutions and amino acid ionic liquids. Currently, amino acid solvents are also utilised to enhance the adsorption capacity of solid sorbents. This systematic review is the first to summarise the currently available amino acid-based adsorbents for CO2 capture using PRISMA method. Physical and chemical properties of the adsorbents that contribute to effective CO2 capture are thoroughly discussed. A total of four categories of amino acid-based adsorbents are evaluated for their CO2 adsorption capacities. The regeneration studies are briefly discussed and several limitations associated with amino acid-based adsorbents for CO2 capture are presented before the conclusion.
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Barrulas RV, López-Iglesias C, Zanatta M, Casimiro T, Mármol G, Carrott MR, García-González CA, Corvo MC. The AEROPILs Generation: Novel Poly(Ionic Liquid)-Based Aerogels for CO2 Capture. Int J Mol Sci 2021; 23:ijms23010200. [PMID: 35008627 PMCID: PMC8745277 DOI: 10.3390/ijms23010200] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Revised: 12/18/2021] [Accepted: 12/21/2021] [Indexed: 12/02/2022] Open
Abstract
CO2 levels in the atmosphere are increasing exponentially. The current climate change effects motivate an urgent need for new and sustainable materials to capture CO2. Porous materials are particularly interesting for processes that take place near atmospheric pressure. However, materials design should not only consider the morphology, but also the chemical identity of the CO2 sorbent to enhance the affinity towards CO2. Poly(ionic liquid)s (PILs) can enhance CO2 sorption capacity, but tailoring the porosity is still a challenge. Aerogel’s properties grant production strategies that ensure a porosity control. In this work, we joined both worlds, PILs and aerogels, to produce a sustainable CO2 sorbent. PIL-chitosan aerogels (AEROPILs) in the form of beads were successfully obtained with high porosity (94.6–97.0%) and surface areas (270–744 m2/g). AEROPILs were applied for the first time as CO2 sorbents. The combination of PILs with chitosan aerogels generally increased the CO2 sorption capability of these materials, being the maximum CO2 capture capacity obtained (0.70 mmol g−1, at 25 °C and 1 bar) for the CHT:P[DADMA]Cl30%AEROPIL.
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Affiliation(s)
- Raquel V. Barrulas
- i3N|Cenimat, Department of Materials Science (DCM), NOVA School of Science and Technology, NOVA University Lisbon, 2829-516 Caparica, Portugal; (R.V.B.); (M.Z.)
| | - Clara López-Iglesias
- Department of Pharmacology, Pharmacy and Pharmaceutical Technology, I+D Farma Group (GI-1645), Faculty of Pharmacy and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain; (C.L.-I.); (C.A.G.-G.)
| | - Marcileia Zanatta
- i3N|Cenimat, Department of Materials Science (DCM), NOVA School of Science and Technology, NOVA University Lisbon, 2829-516 Caparica, Portugal; (R.V.B.); (M.Z.)
| | - Teresa Casimiro
- LAQV-REQUIMTE, Chemistry Department, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516 Caparica, Portugal;
| | - Gonzalo Mármol
- LAQV-REQUIMTE, Instituto de Investigação e Formação Avançada, Departamento de Química e Bioquímica, Escola de Ciências e Tecnologia, Colégio Luís António Verney, Universidade de Évora, 7000-671 Evora, Portugal; (G.M.); (M.R.C.)
| | - Manuela Ribeiro Carrott
- LAQV-REQUIMTE, Instituto de Investigação e Formação Avançada, Departamento de Química e Bioquímica, Escola de Ciências e Tecnologia, Colégio Luís António Verney, Universidade de Évora, 7000-671 Evora, Portugal; (G.M.); (M.R.C.)
| | - Carlos A. García-González
- Department of Pharmacology, Pharmacy and Pharmaceutical Technology, I+D Farma Group (GI-1645), Faculty of Pharmacy and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain; (C.L.-I.); (C.A.G.-G.)
| | - Marta C. Corvo
- i3N|Cenimat, Department of Materials Science (DCM), NOVA School of Science and Technology, NOVA University Lisbon, 2829-516 Caparica, Portugal; (R.V.B.); (M.Z.)
- Correspondence: ; Tel.: +351-21-294-8562; Fax: +351-21-294-8558
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