沸石基吸附剂促进煤层气中CH4/N2/CO2分离的研究进展

IF 3.9 3区 工程技术 Q2 ENGINEERING, CHEMICAL
Wenhui Bi , Fanqi Min , Xing Fan , Tengfei Zhang , Qing Liu , Peng Liang
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引用次数: 0

摘要

煤层气由于其综合利用的潜力和控制强效温室气体甲烷排放的迫切需要而引起了极大的关注。变压吸附分离是最可行的气体富集技术,沸石具有孔隙规整性和均匀性、高比表面积、大孔体积和强极性等特点,在煤层气中选择性分离CH4、N2和CO2方面表现出显著的潜力。ts -4、SAPO-18和SAPO-34的N2/CH4选择性分别高达26、15和12,而ZK-5、A、X、Y、zm -5和硅石-1的CH4/N2选择性高达11.8 (Ag-ZK-5),在298 K和0.1-0.3 MPa下吸附量为1.2-4.0 mmol g⁻1 CH4。Li-SSZ-13、NaMg-GIS、SAPO-17和K- mer等八元环分子筛的CO2/N2选择性分别为310、132、276和85,在298 K和0.1 MPa下的CO2吸附量分别为1.3-4.5 mmol g⁻1。本文综述了沸石的合成、改性技术和吸附动力学的最新进展,阐明了不同类型沸石对CH4吸附能力和选择性提高的因素。此外,本文还对沸石在煤层气富集中的应用提出了自己的看法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Recent advances in zeolite-based adsorbents for enhanced CH4/N2/CO2 separation in coalbed methane
Coalbed methane has attracted significant attention due to its potential for comprehensive utilization and the imperative need to control the emissions of the potent greenhouse gas methane. Pressure-swing adsorption separation is the most feasible gas enrichment technique, and zeolites show remarkable potential in the selective separation of CH4, N2, and CO2 from coalbed methane due to their pore regularity and homogeneity, high specific surface area, large pore volume, and strong polarity. ETS-4, SAPO-18 and SAPO-34 exhibit N2/CH4 selectivities up to 26, 15 and 12, respectively, while ZK-5, zeolite A, X, Y, ZSM-5 and silicalite-1 deliver CH4/N2 selectivities up to 11.8 (Ag-ZK-5) and adsorption capacities of 1.2–4.0 mmol g⁻1 CH4 at 298 K and 0.1–0.3 MPa. Eight-membered-ring zeolites such as Li-SSZ-13, NaMg-GIS, SAPO-17 and K-MER achieve CO2/N2 selectivities of 310, 132, 276 and 85, respectively, with CO2 adsorption capacities of 1.3–4.5 mmol g⁻1 at 298 K and 0.1 MPa. A comprehensive review of recent advances in zeolites synthesis, modification techniques and adsorption kinetics is presented to elucidate the factors responsible for the increased CH4 adsorption capacity and selectivity of different zeolite types. Furthermore, this review proposes the prevailing challenges and offers our personal perspectives for the application of zeolite in coalbed methane enrichment.
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来源期刊
Chemical Engineering Research & Design
Chemical Engineering Research & Design 工程技术-工程:化工
CiteScore
6.10
自引率
7.70%
发文量
623
审稿时长
42 days
期刊介绍: ChERD aims to be the principal international journal for publication of high quality, original papers in chemical engineering. Papers showing how research results can be used in chemical engineering design, and accounts of experimental or theoretical research work bringing new perspectives to established principles, highlighting unsolved problems or indicating directions for future research, are particularly welcome. Contributions that deal with new developments in plant or processes and that can be given quantitative expression are encouraged. The journal is especially interested in papers that extend the boundaries of traditional chemical engineering.
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