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Highly efficient CH4 purification by LaBTB PCP-based mixed matrix membranes

Abstract

Membrane-based technology for CO2/CH4 separation received great deal of interests as its potential in less energy consumption relative to conventional approaches such as cryogenic distillation and chemisorption. Engineering new membrane material with excellent performance is a crucial step to achieve this goal. In this study, we report the facile fabrication of novel mixed-matrix membranes (MMMs) that contain porous coordination polymer (PCP) filler (LaBTB). CO2/CH4 mixed-gas permeation measurements showed that LaBTB/6FDA-DAM polyimide exhibited reduced trade-off and plasticization effects, and thus, surpass the 2008 Robeson upper-bound even under RH 70% moisture (stable CO2 permeability of 700 Barrer and CO2/CH4 selectivity of 30 within 120 h). Importantly, the positive effect of LaBTB within LaBTB/6FDA-DAM for selective CO2 capture has been established by in-situ IR spectroscopy. The excellent separation performance combined with its outstanding water/moisture stability leads LaBTB-based MMMs to be a promising candidate for feasible CO2/CH4 separation.

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Publication details

The article was received on 17 Aug 2017, accepted on 28 Nov 2017 and first published on 28 Nov 2017


Article type: Paper
DOI: 10.1039/C7TA07261A
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Highly efficient CH4 purification by LaBTB PCP-based mixed matrix membranes

    Y. Hua, H. Wang, Q. Li, G. Chen, G. Liu, J. Duan and W. Jin, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA07261A

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