期刊
RENEWABLE ENERGY
卷 196, 期 -, 页码 912-920出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2022.06.137
关键词
Ionic liquids; CO; H-2; Membrane separation; Facilitated transport
资金
- Natural Science Foundation of Jiangsu Province [BK20190310]
- National Natural Science Foundation of China [22078145, 21878141]
- China Postdoctoral Science Foundation [2021M691515]
- Postdoctoral Science Foundation of Jiangsu Province [2021K211B]
- Fundamental Research Funds for the Central Universities [020514380245]
- Yuxiu Young Scholars Program of Nanjing University
Selective and simultaneous separation of CO and H-2 from N-2 using protic chlorocuprate ionic liquids (PCILs)-based membranes is reported in this study. The selectivity of CO/H-2 can be tuned drastically by varying the Cu(I) content and operating temperature. This work offers a new strategy for designing IL-based membranes for CO and H-2 capture.
Efficient recovery of CO and H-2 from offgas streams is environmentally and economically meaningful from the view point of the wide use of syngas ( CO/H-2) in the chemical industry. This work reports selective and simultaneous separation of CO and H-2 from N-2 using protic chlorocuprate ionic liquids (PCILs)-based membranes. The chemical structures of the prepared PCILs were characterized using FTIR, NMR and ESI-MS, and the thermal stability, melting points, viscosity and density of PCILs were determined. The morphology and elemental distribution of PCIL- based membranes were characterized by SEM and EDS. Facilitated transport of CO is observed in these membranes, and the CO permeability is up to 178.3 barrers (0.1 bar, 40 C-o) in [TEAH][CuCl2], with a CO/N-2 selectivity of 26.2. H-2 permeability and H-2/ N-2 selectivity are also found to reach 198.2 barrers (0.5 bar, 40 C-o) and 29.1, respectively. The permeability of CO and the selectivity of CO/N-2 can be further optimized to 405.9 barrers and 69.9 by altering the Cu(I) content, respectively. In addition, the selectivity of CO/H-2 can be tuned drastically via varying the Cu(I) content (from 0.77 to 12.0) and the operating temperature (from 2.14 to 0.42), which may be applied to the composition adjustment of syngas. In a word, this work offers a new strategy for designing IL-based membranes that used for CO and H-2 capture. (c) 2022 Elsevier Ltd. All rights reserved.
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