Review
Environmental Sciences
Shankar Kunalan, Kandasamy Palanivelu
Summary: Carbon dioxide emission is the main cause of environmental issues like global warming and climate change. Capturing CO2 from industrial sources is an important step to address these problems. Polymeric composite membranes have shown better performance in CO2 capture compared to other membranes due to their composite structure. This review discusses the utilization of different polymeric composite membranes and their potential to improve the CO2 capture process in industrial applications.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Chemical
Xinru Zhang, Xiaofeng Ren, Yonghong Wang, Jinping Li
Summary: This study successfully improved the CO2 permeance and selectivity by preparing core-shell MOFs@COFs hybrids and developing porous hybrid membranes. The material shows potential for application in CO2 capture.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Xiaoke Wu, Huayu Zhang, Zhengchi Yin, Yanwei Yang, Zhengbao Wang
Summary: A ZIF-8/GO composite membrane with a thickness of 0.9 μm was successfully prepared using a precursor conversion method. The effects of precursor amount, reaction time, and membrane thickness on the membrane performance were investigated. The composite membrane exhibited good H-2/CO2 separation performance.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Dongxu Zhang, Zhiqian Jia, Shengping Zhang, Dandan Hou, Jianjun Wang, Ye Liu, Xiao Han, Bart van der Bruggen, Luda Wang
Summary: Inspired by the composite structure of cell membranes and cell walls, a fiber-reinforced large-area atomically thin nanoporous graphene membrane with enhanced mechanical strength and stability is designed, exhibiting superior gas permeance and low water vapor transportation rate.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Chemical
Xueli Wang, Lei Wu, Nanwen Li, Yanfang Fan
Summary: The research successfully developed MMMs using TB polymer, PDA, and ZIF-8 fillers, improving membrane performance in terms of mechanical properties and gas selectivity.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Mahsa Loloei, Serge Kaliaguine, Denis Rodrigue
Summary: Bimetallic metal-organic frameworks (MOF) have gained attention for their synergic effect and enhanced properties compared to their parent structures. This study reports the synthesis of bimetallic Zn/Co-ZIF and its monometallic counterparts, ZIF-8 and ZIF-67, with a facile and low-cost method. Zn/Co-ZIF showed higher pore volume, BET surface area, and a slightly higher Zn-rich external surface.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Polymer Science
Aftab Aslam Parwaz Khan, Mallikarjunagouda B. Patil, Laxmibai P. Rathod, Shivalila G. Vader, Pankaj Raizada, Pardeep Singh, Maha M. Alotaibi, Mohammad Omaish Ansari, Anish Khan, Naved Azum, Malik Abdul Rub, Muhammad Nadeem Arshad, Abdullah M. Asiri
Summary: The study assessed the potential of nanocomposite membranes (NCMs) made of sodium alginate and embedded with synthesized zeolitic imidazole framework-8 (ZIF-8) as fillers for separating gaseous mixtures generated by methane reforming. ZIF-8 crystals were synthesized through hydrothermal synthesis, with sizes ranging from 50 to 70 nm. NCMs with 15% filler loading (synthesized ZIF-8) outperformed neat polymer membranes in terms of H-2 permeability and selectivity, achieving a purity of up to 95%. However, NCMs did not perform better than neat polymer membranes in separating gas mixtures. The combination of ZIF-8 and sodium alginate as fillers is a new and worth investigating.
Article
Chemistry, Multidisciplinary
Shiyuan Zhu, Quanjie Lin, Xiaopeng Huang, Liangji Chen, Lizhen Liu, Zizhu Yao, Shengchang Xiang
Summary: ZIF-8 membranes prepared on polyamide substrates demonstrated successful separation of acetylene/methane and acetylene/carbon dioxide mixtures with separation factors of 12.1 and 1.8 respectively. The separation mechanism for C2H2/CH4 is attributed to acetylene affinity and molecular sieving, while C2H2/CO2 separation is related to thermodynamic factors. This study marks the first successful separation of C2H2 from CH4 and CO2 by MOF membranes.
Article
Engineering, Chemical
Shaohui Xiong, Chunyue Pan, Guoliu Dai, Cheng Liu, Zhijian Tan, Chuang Chen, Song Yang, Xuehua Ruan, Juntao Tang, Guipeng Yu
Summary: Porous asymmetric composite membranes (ACMs) with defect-free interface and enhanced selectivity have been fabricated by employing an efficient co-weaving strategy to regulate interfacial microstructure of ACMs with bilayer geometry on porous substrates. The obtained AO-PIM1@ZIF-8 membrane demonstrates remarkable performance in H-2/CO2 separations, surpassing most reported ACMs.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Environmental Sciences
Prashant Choudhary, Nishel Saini, Myung Han Yoon, Kamlendra Awasthi, Kamakshi Pandey
Summary: In this study, high-performance ZIF-8 @polycarbonate nanocomposite membranes with satisfactory structural stability for gas separation were reported. ZIF-8 nanoparticles with cubic morphology and controlled size were synthesized using the wet chemical method. Membranes with different concentrations of ZIF-8 filler were prepared using the solution casting method. The synthesized filler and membranes were characterized using various techniques, and gas separation measurements were taken using pure H2, CO2, and N2 gases. The results showed that the 15 wt% ZIF-8/PC nanocomposite membrane exhibited the highest H2 permeability, with an increment of 316.03%. The H2/CO2 and H2/N2 selectivity also showed significant improvements of 89.43% and 103.64%, respectively. Therefore, the PC/ZIF-8 system seems promising for the development of new H2 selective membranes with high gas permeability and selectivity values.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Chemical
Salman Shahid, Gino V. Baron, Joeri F. M. Denayer, Johan A. Martens, Lik H. Wee, Ivo F. J. Vankelecom
Summary: Mixed matrix membranes (MMM) incorporating hierarchically structured metal-organic framework (MOF) fillers show improved gas separation performance, with 4-fold enhancements in CO2 and CH4 permeabilities and increased selectivity and plasticization resistance. The method involves the synthesis of hierarchical ZIF-8 particles for compatibility with polyimide (PI) in MMMs. The enhanced gas transport properties are attributed to the modified PI structure and hierarchical nature of H-ZIF-8.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Yonghong Wang, Juanjuan Wang, Xinru Zhang, Jinping Li, Long Li
Summary: In this study, a ZIF-8-decorated metakaolin (ZIF-8-d-MK) hybrid was successfully prepared and coated on polysulfone ultrafiltration membranes to efficiently separate CO2 from N-2. The well-dispersed ZIF-8-d-MK in the PVAm matrix showed strong interaction with the polymer matrix, leading to improved CO2 permeance and selectivity. The molecular sieving effect of ZIF-8-d-MK contributed to the enhanced separation performance of MMCMs under both pure gas and mixed gas feed conditions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Manman Zhang, Liu Chen, Ziyi Yuan, Raphael Semiat, Xuezhong He
Summary: Poly-(ionic liquid) (PIL)-based membranes show promise for CO2 removal due to their tunable chemical structure and processability. This study explored the effects of different side chains on the CO2 separation performance of PILs, using 1-vinylimidazole as the polymeric backbone. The results showed that the cyano-based side chain outperformed the carboxyl-based side chain in CO2 separation. The prepared PIL-based membranes demonstrated an increased CO2 permeance of 200% and CO2/N2 selectivity of 195%.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Chemical
Matthew N. Davenport, Caitlin L. Bentley, Joan F. Brennecke, Benny D. Freeman
Summary: A coordination complex between Ag+ ions and olefin molecules in polymer membranes has been developed, resulting in enhanced olefin-paraffin selectivity. The stability of the Ag+ carrier in the membranes has been improved through the use of solid polymer electrolytes containing AgTf2N salt. The membranes exhibit high ethylene-ethane selectivity and permeability, surpassing the upper bound of traditional polymeric gas separation membranes. The observed dual-mode ethylene sorption is explained using a chemical equilibrium model.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Dandan Hou, Shengping Zhang, Xiaobo Chen, Ruiyang Song, Dongxu Zhang, Ayan Yao, Jiayue Sun, Wenxuan Wang, Luzhao Sun, Buhang Chen, Zhongfan Liu, Luda Wang
Summary: This study presents a facile method for fabricating nanoporous atomically thin membranes (NATMs) by directly casting a porous polymer substrate onto graphene. The resulting flexible nanoporous polymer substrate provides sufficient mechanical support without compromising the permeance of the NATMs. The NATMs, with proper pore size and a uniform spongelike structure, demonstrate salt resistance and 3-5 times higher gas permeance than commercial polymeric membranes, bridging the gap between laboratory-scale proof-of-concept and practical applications in the industry.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Environmental
Hasan Can Gulbalkan, Zeynep Pinar Haslak, Cigdem Altintas, Alper Uzun, Seda Keskin
Summary: By conducting high-throughput computational screening and molecular simulations, this study identified the great potential of MOFs for CH4/N2 separation and the significant enhancement of selectivity with IL incorporation. Over 25% of MOF and 70% of COF membranes exceeded traditional performance limits, with MOF/polymer and COF/polymer composites showing superior properties compared to pure polymers.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Gokhan Onder Aksu, Ilknur Erucar, Zeynep Pinar Haslak, Seda Keskin
Summary: Screening of hypothetical COF database led to the discovery of promising CO2 separation materials, with simulations showing superior CO2/H2 separation performance compared to experimental COFs. Molecular insights into the unique structural features of hypothetical COFs will guide the synthesis of novel materials for enhanced CO2 separation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Applied
Ozce Durak, Muhammad Zeeshan, Nitasha Habib, Hasan Can Gulbalkan, Ala Abdulalem Abdo Moqbel Alsuhile, Hatice Pelin Caglayan, Samira F. Kurtoglu-Oztulum, Yuxin Zhao, Zeynep Pinar Haslak, Alper Uzun, Seda Keskin
Summary: The modification of porous materials' physicochemical properties using ionic liquids (ILs) has been extensively studied for various applications. The combination of ILs and porous materials shows great potential in gas adsorption and separation, catalysis, liquid-phase adsorption and separation, and ionic conductivity due to superior performances of hybrid composites. This review discusses the evolution of IL/porous material composites as a research field by exploring different types of porous materials, including metal organic frameworks (MOFs), covalent organic frameworks (COFs), zeolites, and carbonaceous materials. The challenges, opportunities, synthesis methods, characterization techniques, applications, and future prospects of IL/porous materials are discussed to provide a roadmap for this area. The future advancements discussed in this review will provide insights into the design and development of novel hybrid materials and their potential to replace conventional materials.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Engineering, Chemical
Hilal Daglar, Sena Aydin, Seda Keskin
Summary: This research evaluated the performance of nearly 180,000 different MOF/polymer MMMs in 11 different gas separations, finding that many of them exceeded the upper bounds due to high gas permeability and selectivity, and showed that using MOFs as fillers significantly improved the gas permeability of polymers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Hakan Demir, Seda Keskin
Summary: The study investigates the separation properties of MOFs for CO2 from various gas mixtures and identifies the best performing adsorbent materials.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Nanoscience & Nanotechnology
Sena Aydin, Cigdem Altintas, Seda Keskin
Summary: This study focuses on the performance of experimentally synthesized covalent organic frameworks (COFs) and hypothetical COFs as membrane materials for gas separation. By calculating the gas permeability and selectivity of COFs, it was found that many COF membranes have exceeded the upper limit of polymeric membranes. This study also proposes an efficient method for selecting the best hypothetical COFs and investigates mixed matrix membranes composed of COFs and polymers. The results show that the performance of many polymers can surpass the upper limit when COFs are used as fillers.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Johannes W. M. Osterrieth, Jarnes Rampersad, David Madden, Nakul Rampal, Luka Skoric, Bethany Connolly, Mark D. Allendorf, Vitalie Stavila, Jonathan L. Snider, Rob Ameloot, Joao Marreiros, Conchi Ania, Diana Azevedo, Enrique Vilarrasa-Garcia, Bianca F. Santos, Xian-He Bu, Ze Chang, Hana Bunzen, Neil R. Champness, Sarah L. Griffin, Banglin Chen, Rui-Biao Lin, Benoit Coasne, Seth Cohen, Jessica C. Moreton, Yamil J. Colon, Linjiang Chen, Rob Clowes, Francois-Xavier Coudert, Yong Cui, Bang Hou, Deanna M. D'Alessandro, Patrick W. Doheny, Mircea Dinca, Chenyue Sun, Christian Doonan, Michael Thomas Huxley, Jack D. Evans, Paolo Falcaro, Raffaele Ricco, Omar Farha, Karam B. Idrees, Timur Islamoglu, Pingyun Feng, Huajun Yang, Ross S. Forgan, Dominic Bara, Shuhei Furukawa, Eli Sanchez, Jorge Gascon, Selvedin Telalovic, Sujit K. Ghosh, Soumya Mukherjee, Matthew R. Hill, Muhammed Munir Sadiq, Patricia Horcajada, Pablo Salcedo-Abraira, Katsumi Kaneko, Radovan Kukobat, Jeff Kenvin, Seda Keskin, Susumu Kitagawa, Ken-ichi Otake, Ryan P. Lively, Stephen J. A. DeWitt, Phillip Llewellyn, Bettina Lotsch, Sebastian T. Emmerling, Alexander M. Putz, Carlos Marti-Gastaldo, Natalia M. Padial, Javier Garcia-Martinez, Noemi Linares, Daniel Maspoch, Jose A. Suarez del Pino, Peyman Moghadam, Rama Oktavian, Russel E. Morris, Paul S. Wheatley, Jorge Navarro, Camille Petit, David Danaci, Matthew J. Rosseinsky, Alexandros P. Katsoulidis, Martin Schroder, Xue Han, Sihai Yang, Christian Serre, Georges Mouchaham, David S. Sholl, Raghuram Thyagarajan, Daniel Siderius, Randall Q. Snurr, Rebecca B. Goncalves, Shane Telfer, Seok J. Lee, Valeska P. Ting, Jemma L. Rowlandson, Takashi Uemura, Tomoya Liyuka, Monique A. van derVeen, Davide Rega, Veronique Van Speybroeck, Sven M. J. Rogge, Aran Lamaire, Krista S. Walton, Lukas W. Bingel, Stefan Wuttke, Jacopo Andreo, Omar Yaghi, Bing Zhang, Cafer T. Yavuz, Thien S. Nguyen, Felix Zamora, Carmen Montoro, Hongcai Zhou, Angelo Kirchon, David Fairen-Jimenez
Summary: Porosity and surface area analysis are important in modern materials science. However, there is a lack of attention to the reproducibility issue in calculating BET surface areas from identical isotherms, raising concerns over the reliability of reported BET areas. To address this, a new computational approach called BET surface identification (BETSI) has been developed for accurately and systematically determining the BET area of nanoporous materials.
ADVANCED MATERIALS
(2022)
Article
Engineering, Environmental
Ozce Durak, Muhammad Zeeshan, Seda Keskin, Alper Uzun
Summary: In this study, a composite material was prepared by coating an ordinary activated carbon surface with an ionic liquid, resulting in high selectivity for CO2 and inhibited sorption of N2 and CH4. The newly formed chemisorption and physisorption sites on the surface contributed to the enhanced selectivity of the composite material.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Cigdem Altintas, Seda Keskin
Summary: This study evaluates the performance of metal organic frameworks (MOFs) for CO2/N-2 separation using molecular simulations and compares the rankings of MOFs based on different performance metrics. The results provide important insights for identifying the most promising adsorbents for efficient flue gas separation.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Computer Science, Interdisciplinary Applications
Hakan Demir, Seda Keskin
Summary: With advancements in computational resources and algorithms, computer simulations are now being used to tackle important global challenges such as CO2 capture. This study computationally screened a metal-organic framework database to identify the best-performing materials for efficient CO2 separation. The findings provide valuable insights for experimental design and improving CO2 selectivity.
COMPUTERS & CHEMICAL ENGINEERING
(2022)
Article
Engineering, Chemical
Hasan Can Gulbalkan, Zeynep Pinar Haslak, Cigdem Altintas, Alper Uzun, Seda Keskin
Summary: Covalent organic frameworks (COFs) have emerged as promising adsorbents and membranes for gas separation. This study explores the performance of IL/COF composites in CO2/N2 adsorption and membrane separation through computational screening methods. The incorporation of ILs significantly improves the adsorption selectivity and performance scores of COFs. The nature of the interactions between CO2, N2, COFs, and IL-incorporated composites was evaluated using DFT calculations. IL/COF membranes exhibit high CO2 permeability and comparable selectivity to traditional polymer and zeolite membranes, showing potential for flue gas separation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Hilal Daglar, Seda Keskin
Summary: In this study, molecular simulations and machine learning were combined to evaluate the separation performances of MOF membranes and MOF/polymer MMMs for different gas separations. The developed ML models accurately predicted the gas adsorption and diffusion properties in MOFs, significantly accelerating the assessment of separation performances.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Muhammad Zeeshan, Hasan Can Gulbalkan, Ozce Durak, Zeynep Pinar Haslak, Ugur Unal, Seda Keskin, Alper Uzun
Summary: This study presents an integrated computational-experimental hierarchical approach for selecting the best IL-MOF combination for gas separation applications. By using multiple computational tools, a highly performant IL-MOF combination was identified, paving the way for rational design and development of gas separation applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Engineering, Chemical
Nitasha Habib, Ozce Durak, Muhammad Zeeshan, Alper Uzun, Seda Keskin
Summary: In this study, a novel IL/MOF/polymer mixed matrix membrane was synthesized and characterized. The results showed that the composite membrane significantly improved the CO2 permeability and CO2/N2 selectivity of the polymer. Among them, the membrane with a 15% IL/MOF filler loading exhibited the highest CO2/N2 selectivity.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Review
Chemistry, Multidisciplinary
Cigdem Altintas, Ilknur Erucar, Seda Keskin
Summary: The rapid development of metal organic frameworks and covalent organic frameworks has led to groundbreaking applications in materials science and engineering. The new MOF/COF hybrid materials exhibit excellent properties and offer promising performances in various fields including catalysis, energy storage, gas separation, and nanomedicine.