Article
Engineering, Chemical
Yuhe Cao, Kuang Zhang, Chen Zhang, William J. Koros
Summary: This study presents an economically viable method to fabricate composite nanoparticle-containing carbon molecular sieve hollow fiber membranes with excellent gas separation performance through a coating process.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Lu Liu, Dongxia Liu, Chen Zhang
Summary: This study demonstrates that polyimide-derived asymmetric carbon molecular sieve (CMS) hollow fiber membranes exhibit outstanding H-2/C3H8 separation performance at high temperatures, making them potentially attractive for catalytic propane dehydrogenation membrane reactors. By controlling the mixture of hydrogen and propane, stable performance of CMS membranes under high-temperature conditions can be achieved.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Ayesha Raza, Mohammad Askari, Can Zeng Liang, Na Peng, Sarah Farrukh, Arshad Hussain, Tai-Shung Chung
Summary: This study developed a new dual-layer hollow fiber membrane for CO2 separation with high permeance and selectivity, showing a high CO2/CH4 selectivity. This newly developed membrane may have great potential for CO2/CH4 separation.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Can Zeng Liang, Wai Fen Yong, Ji Wu, Martin Weber, Christian Maletzko, Juin-Yih Lai, Tai-Shung Chung
Summary: In this study, a newly designed polymer, PTPES, was reported to significantly increase propylene permeance and propylene/propane selectivity through the plasticization effect. This was attributed to the plasticization-enlarged molecular sieving effect caused by the trimethylbenzene moieties in the polymer chains. This research provides new insights into the gas transport mechanisms of membrane materials and may inspire the development of new-generation polymeric materials and membranes for propylene/propane and other gas separations.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Physical
Jong Geun Seong, Jeremy C. Lewis, John A. Matteson, Erica Craddock, Ulises Martinez, Harshul Thakkar, Angelica D. Benavidez, Kathryn A. Berchtold, Rajinder P. Singh
Summary: Polymer membrane carbonization is a promising strategy for obtaining carbon molecular sieve (CMS) membrane materials with tailorable cavity size distributions. In this study, highly O-2 permselective CMS hollow fiber membranes (HFMs) derived from rigid PBI materials were fabricated and evaluated for O-2/N-2 separation performance.
Article
Engineering, Chemical
Wulin Qiu, Liren Xu, Zhongyun Liu, Yang Liu, Pezhman Arab, Mark Brayden, Marcos Martinez, Junqiang Liu, Abhishek Roy, William J. Koros
Summary: The study demonstrates successful recovery of aged carbon molecular sieve (CMS) fibers through super-hyperaging technique, achieving satisfactory propylene permeance with optimal selectivity. A super-hyperaging temperature of around 280 degrees Celsius is shown to provide the best balance between permeance and selectivity. The regenerated CMS membrane surpasses the polymer permeance-selectivity tradeoff upper bound, with a hypothetical mechanism for the super-hyperaging recovery of aged CMS fibers discussed.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Physical
Tiago Araujo, Andrew J. Parnell, Gabriel Bernardo, Adelio Mendes
Summary: Carbon molecular sieve membranes were prepared by carbonizing a cellulose-based polymeric pre-cursor doped with urea. The addition of urea increased the structural disorder and pore volume of the membranes. This unique preparation method effectively allows tuning of the pore size for desired separations, with urea acting as a pore-forming agent. With the addition of 2.8 wt% urea, the permeability of the prepared carbon membrane to hydrogen was doubled, while maintaining selectivity and obtaining a permeability to oxygen of 333 barrer.
Review
Chemistry, Physical
Rebecca L. Siegelman, Eugene J. Kim, Jeffrey R. Long
Summary: Global investment in counteracting climate change has generated interest in carbon capture and sequestration (CCS) as an emissions mitigation technology. Porous materials can adsorb large quantities of gas, making them a promising solution for CO2 capture and decarbonization efforts.
Article
Engineering, Chemical
Farhang Pazani, Mehrdad Shariatifar, Mohammad Salehi Maleh, Taliehsadat Alebrahim, Haiqing Lin
Summary: Mixed matrix hollow fiber composite membranes (MM-HFCMs) combine the excellent processability of polymers with the unique separation properties of nanofillers, resulting in high packing density and superior CO2/gas separation performance. This review provides a comprehensive overview of the advancement of MM-HFCMs for practical CO2 separations. It covers membrane configurations, fabrication methods, membranes with superior separation properties, strategies to mitigate interfacial incompatibility, and parameters defining enhancement of separation properties by nanofillers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Lujie Sheng, Jizhong Ren, Dan Zhao, Hui Li, Kaisheng Hua, Maicun Deng
Summary: The study investigated the structural evolution and gas separation performance changes of P84 HFMs from polymer to carbonization stages, revealing that the substructure of P84 HFMs began to collapse during the intermediate stage, which affected the gas permeance of P84 CMS HFMs.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Qixiang Wang, Fei Huang, Chris J. Cornelius, Yanfang Fan
Summary: Carbon molecular sieve (CMS) membranes fabricated using carboxylated polyimides exhibited enhanced gas separation performance, particularly in CO2 and olefin separation. Increasing the pyrolysis temperature of polyimides can improve membrane selectivity but reduce permeability, while Zn2+ functionalization can further enhance gas selectivity. These materials have great potential for industrial applications such as CO2 separation and olefin recovery, surpassing Robeson's upper-bound for gas separation.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Review
Chemistry, Physical
Mengying Long, Yu Ma, Chao Yang, Runnan Zhang, Zhongyi Jiang
Summary: This review discusses the significant role of superwetting membranes in membrane separation processes, emphasizing their impact on membrane performance such as liquid transport and membrane construction methods. These membranes have been applied in various areas such as oil-water separation and desalination, with opportunities and challenges for future development highlighted.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Review
Chemistry, Multidisciplinary
Haozhen Dou, Mi Xu, Baoyu Wang, Zhen Zhang, Guobin Wen, Yun Zheng, Dan Luo, Lei Zhao, Aiping Yu, Luhong Zhang, Zhongyi Jiang, Zhongwei Chen
Summary: Microporous framework membranes, including MOF membranes and COF membranes, offer great potential to address the tradeoff between membrane permeability and selectivity, making them promising candidates for future membrane technology. The past five years have seen a surge in novel membrane materials and applications in this field.
CHEMICAL SOCIETY REVIEWS
(2021)
Article
Engineering, Environmental
Chenjie Wei, Xihang Zhang, Shuyan Ma, Chengxiong Zhang, Yang Li, Dajing Chen, Hong Jiang, Zhikang Xu, Xiaojun Huang
Summary: The study developed an ultra-robust Janus PP hollow fiber membrane with capillary-driven siphon and photothermal properties, achieving high evaporation rate, superior salt resistance, multi-media evaporation applications, and stability. This membrane demonstrated asymmetric wettability, high mechanical strength, strong light absorption, and superior performance in rejecting ions, oil, and dye contaminants, providing a new paradigm for low heat loss, high evaporation rate, salt resistance, and multi-media purification.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Peng Gao, Sun-Jie Xu, Zhen-Liang Xu, Ping Li, Yu-Zhe Wu, Lan-Qian Li, Hai-Zhen Zhang
Summary: High-flux fine hollow fiber nanofiltration membranes were successfully prepared using polysulfone ultrafiltration membranes as substrates. The optimal preparation conditions were determined through orthogonal experiments, resulting in high flux and salt rejection rate. The membranes showed excellent antifouling performance and potential for drinking water purification.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Gongping Liu, Amandine Cadiau, Yang Liu, Karim Adil, Valeriya Chernikova, Ionela-Daniela Carja, Youssef Belmabkhout, Madhavan Karunakaran, Osama Shekhah, Chen Zhang, Arun K. Itta, Shouliang Yi, Mohamed Eddaoudi, William J. Koros
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2018)
Article
Chemistry, Physical
Jason S. Adams, Arun K. Itta, Chen Zhang, Graham B. Wenz, Oishi Sanyal, William J. Koros
Article
Chemistry, Multidisciplinary
Yang Liu, Gongping Liu, Chen Zhang, Wulin Qiu, Shouliang Yi, Valeriya Chernikova, Zhijie Chen, Youssef Belmabkhout, Osama Shekhah, Mohamed Eddaoudi, William Koros
Article
Engineering, Chemical
Gongping Liu, Ying Labreche, Nanwen Li, Yang Liu, Chen Zhang, Stephen J. Miller, Vinod P. Babu, Nitesh Bhuwania, William J. Koros
Article
Engineering, Chemical
Rachana Kumar, Chen Zhang, Arun K. Itta, Willam J. Koros
JOURNAL OF MEMBRANE SCIENCE
(2019)
Article
Chemistry, Physical
Ying Pan, Antara Bhowmick, Wei Wu, Yuan Zhang, Yuxia Diao, Aiguo Zheng, Chen Zhang, Rongxuan Xie, Zixiao Liu, Jianqiang Meng, Dongxia Liu
Summary: This study presents a catalyst mechanism using Pt/M-TS-1 on ultrathin M-TS-1 nanosheets to enhance stability and selectivity in NDE by preventing coke deposition and thermal sintering. The durable catalytic activity and high ethylene selectivity of the Pt/M-TS-1 catalyst demonstrate its potential for industrial applications.
Article
Engineering, Chemical
Lu Liu, Dongxia Liu, Chen Zhang
Summary: This study demonstrates that polyimide-derived asymmetric carbon molecular sieve (CMS) hollow fiber membranes exhibit outstanding H-2/C3H8 separation performance at high temperatures, making them potentially attractive for catalytic propane dehydrogenation membrane reactors. By controlling the mixture of hydrogen and propane, stable performance of CMS membranes under high-temperature conditions can be achieved.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Yuhe Cao, Kuang Zhang, Chen Zhang, William J. Koros
Summary: This study presents an economically viable method to fabricate composite nanoparticle-containing carbon molecular sieve hollow fiber membranes with excellent gas separation performance through a coating process.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Dennis Tran, Chen Zhang, Kyu Yong Choi
Summary: The choice of silica support for polymerization catalysts has a significant impact on metal loading, catalyst performance, and polymer properties. Pore volume and pore diameter are important properties to consider. This study investigates the effects of pore diameter and volume on the polymerization of ethylene using silica supports. The results show that different types of silica exhibit varying effects on pore characteristics, and polymerization activity correlates with pore diameter and surface area.
MACROMOLECULAR REACTION ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Chen Zhang, Gaurav M. Iyer
Summary: In this study, ultramicroporous carbon molecular sieve (CMS) membranes derived from uncrosslinked aramid were used for precise hydrogen sieving, achieving ultrahigh H2/CO2 selectivity exceeding all known CMS membranes. The excellent solution processability of uncrosslinked aramids enabled the fabrication of scalable CMS hollow fiber membranes. This work opens up new possibilities for highly selective CMS membranes for H2 separation and CO2 capture.
ACS MATERIALS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Lu Liu, Ching-En Ku, Chen Zhang
Summary: Porous oxide hollowfiber membranes were fabricated via the petrification of polymer hollowfiber templates at a much lower temperature. These membranes possess a unique hierarchical micro-/meso-/macroporous structure, allowing efficient filtration and separation of macromolecular solutes.
ACS MATERIALS LETTERS
(2022)
Review
Polymer Science
Gaurav M. Iyer, Lu Liu, Chen Zhang
JOURNAL OF POLYMER SCIENCE
(2020)
Review
Chemistry, Multidisciplinary
Yanshu Shi, Bin Liang, Rui-Biao Lin, Chen Zhang, Banglin Chen
TRENDS IN CHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
Chen Zhang, William J. Koros
ADVANCED MATERIALS
(2017)