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| Highly Selective Benzimidazole-Based Polyimide/Ionic Polyimide Membranes for Pure- and Mixed-Gas CO2/CH4 Separation | |
| Xie, Wei1,2; Jiao, Yang1; Cai, Zhili1; Liu, Hongyan1; Gong, Lili1; Lai, Wei1; Shan, Linglong1; Luo, Shuangjiang1,3 | |
| 2022-02-01 | |
| Source Publication | SEPARATION AND PURIFICATION TECHNOLOGY
 |
| ISSN | 1383-5866 |
| Volume | 282Pages:9 |
| Abstract | This paper reports two new series of benzimidazole functionalized polyimides and ionic polyimides for highly selective membranes with great potential for natural gas sweetening. It has been demonstrated that both the -NH groups in the benzimidazole moieties and the corresponding ionic groups after N-quaternization tighten the microporous structure and restrict polymer chain mobility through hydrogen bonding and electrostatic interaction. The BET surface areas and d-spacing values decrease with benzimidazole molar content or the degree of ionization. Consequently, a linear correlation between CO2 permeability coefficients with benzimidazole molar content or degree of ionization was observed due to the decrease of CO2 diffusivity, and the monotonic increase of CO2/CH4 selectivities is ascribed to the increase of both diffusivity selectivity and solubility selectivity. The benzimidazole-based copolyimide and the ionic copolyimide membranes exhibited high CO2/CH4 selectivity under high-pressure mixed-gas conditions. In particular, the copolyimide PI-0.75 membrane displayed a mixed gas CO2 permeability of 27 Barrer and CO2/CH4 selectivity of 47 at 20 bar total pressure. The performance was much higher than those of the state-of-the-art commercial cellulose triacetate membranes for natural gas upgrading. The facile polymer synthesis and microporosity tunability, as well as the excellent mixed-gas separation performance, render the copolyimide membranes in this study promising towards economic membrane mediated natural gas upgrading. |
| Keyword | Polyimides Ionic polyimides Hydrogen bonding Mixed-gas permeation Nature gas sweetening |
| DOI | 10.1016/j.seppur.2021.120091 |
| Language | 英语 |
| WOS Keyword | HOLLOW-FIBER MEMBRANES ; TRANSPORT PROPERTIES ; CROSS-LINKING ; PERMEATION PROPERTIES ; PLASTICIZATION ; POLYMERS ; PERMEABILITY |
| Funding Project | National Natural Science Foundation of China[22008243] ; National Natural Science Foundation of China[22090063] ; Dalian National Laboratory for Clean Energy (DNL) Cooperation Fund of CAS[DNL201917] ; Beijing Nova Program of Science and Technology[Z191100001119107] ; International Partner Program of CAS[122111KYSB20200035] ; International Partner Program of CAS[122111KYSB20190060] ; Project of Stable Support for Youth Team in Basic Research Field, CAS[YSBR-017] |
| WOS Research Area | Engineering |
| WOS Subject | Engineering, Chemical |
| Funding Organization | National Natural Science Foundation of China ; Dalian National Laboratory for Clean Energy (DNL) Cooperation Fund of CAS ; Beijing Nova Program of Science and Technology ; International Partner Program of CAS ; Project of Stable Support for Youth Team in Basic Research Field, CAS |
| WOS ID | WOS:000720836500007 |
| Publisher | ELSEVIER |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/51068 |
| Collection | 中国科学院过程工程研究所 |
| Corresponding Author | Luo, Shuangjiang |
| Affiliation | 1.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing Key Lab Ion Liquids Clean Proc,State Key, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China |
| Recommended Citation GB/T 7714 | Xie, Wei,Jiao, Yang,Cai, Zhili,et al. Highly Selective Benzimidazole-Based Polyimide/Ionic Polyimide Membranes for Pure- and Mixed-Gas CO2/CH4 Separation[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2022,282:9. |
| APA | Xie, Wei.,Jiao, Yang.,Cai, Zhili.,Liu, Hongyan.,Gong, Lili.,...&Luo, Shuangjiang.(2022).Highly Selective Benzimidazole-Based Polyimide/Ionic Polyimide Membranes for Pure- and Mixed-Gas CO2/CH4 Separation.SEPARATION AND PURIFICATION TECHNOLOGY,282,9. |
| MLA | Xie, Wei,et al."Highly Selective Benzimidazole-Based Polyimide/Ionic Polyimide Membranes for Pure- and Mixed-Gas CO2/CH4 Separation".SEPARATION AND PURIFICATION TECHNOLOGY 282(2022):9. |
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