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Sub-ambient temperature carbon capture properties of intrinsic microporous polymers

Authors： DONG Xinyao,JI wenhui, YAN xuhuan,LI Jianxin, MA Xiaohua

Units： State Key Laboratory of Membrane Separation and Membrane Process, College of Material Science and Engineering, Tiangong University, Tianjin, China, 300387

KeyWords： Polymer of intrinsic microporosity; Carbon capture; Ladder polymer; PTMSP; Sub-ambient temperature separation

ClassificationCode：TQ31

year,volume(issue):pagination： 2021,41(3):44-51

Abstract：

Carbon capture is a critical problem all over the world. Sub-ambient temperature membrane-based separation technique is one of the promising methods to solve the CO2 capture and storage problems recently developed. In this work, we combined the highly CO2 permeable polymer of intrinsic microporosity and the low temperature technique to achieve polymer membranes with both high CO2 permeability and CO2/N2 selectivity for the first time. Highly porous PIM-1 and PTMSP were adopted for evaluation their sub-ambient temperature properties. Surprisingly, PTMSP demonstrated simultaneously increased CO2 permeability and CO2/N2 selectivity upon decreasing temperatures. At -30 oC, the PTMSP demonstrated a CO2 permeability of 25492 Barrer and CO2/N2 selectivity of 34, which is by far higher than the latest 2019 trade-off curve. Additionally, the CO2/N2 (15/85) mixed-gas demonstrated a CO2 permeability of ~20000 and CO2/N2 selectivity of 32, which is one of the best CO2 separation membranes ever reported. The using of PIMs at low temperature for CO2 separation showed great perspective in carbon capture and storage.

Funds：

国家自然科学基金（51703036，22078245），教育部创新团队项目（IRT17R80），天津市科技计划项目（18PTZWHZ00210，19PTSYJC0030）。天津市自然科学基金青年项目（18JCQNJC72400）

AuthorIntro：

董馨瑶（1999-），女，黑龙江佳木斯人，本科

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