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

Membrane-based technology for CO2/CH4 separation has received significant interests due to its potentially lower energy consumption relative to that of conventional approaches such as cryogenic distillation and chemisorption. Engineering a new membrane material with excellent performance is a crucia...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2018, Vol.6 (2), p.599-606
Main Authors: Yinying Hua, Wang, Haijun, Li, Qianqian, Chen, Guining, Liu, Gongping, Duan, Jingui, Jin, Wanqin
Format: Article
Language:English
Subjects:
Carbon dioxide
Carbon sequestration
Chemisorption
Coordination polymers
Distillation
Energy consumption
Fabrication
Gas permeation
Infrared spectroscopy
Membranes
Methane
Moisture
Permeability
Purification
Separation
Upper bounds
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Membrane-based technology for CO2/CH4 separation has received significant interests due to its potentially lower energy consumption relative to that of conventional approaches such as cryogenic distillation and chemisorption. Engineering a new membrane material with excellent performance is a crucial step in achieving this goal. In this study, we report the facile fabrication of novel mixed-matrix membranes (MMMs) that contain a 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 surpassed 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. Excellent separation performance combined with their outstanding water/moisture stability suggests that LaBTB-based MMMs are promising candidates for feasible CO2/CH4 separation.
ISSN:2050-7488
2050-7496
DOI:10.1039/c7ta07261a