A nonwoven supported mixed matrix membrane for CH4/N2 separation  

作　　者：Yuntao Liang Yongjing Wang Wenbin Feng Jingkai Xu Wei Xiao 

机构地区：[1]State Key Laboratory of Coal Mine Disaster Prevention and Control,China Coal Technology and Engineering Group Shenyang Research Institute,Shenfu Demonstration Zone 113122,China [2]China Coal Research Institute,Beijing 100013,China [3]School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun 113001,China

出　　处：《Chinese Journal of Chemical Engineering》2024年第9期101-108,共8页中国化学工程学报（英文版）

基　　金：financial support from the National Natural Science Foundation of China(52174229 and 52174230);the Natural Science Foundation of Liaoning Province(2022-KF-13-05);Fushun Revitalization Talents Program(FSYC202107010);the program funded by Liaoning Province Education Administration(LJKZ0411).

摘　　要：Efficiently enriching low-concentration CH4 is pivotal for enhancing the utilization of unconventional energy sources and mitigating greenhouse gas emissions.This study focuses on modifying the overall performance of CH_(4)/N_(2)separation membranes.A novel mixed matrix membrane(MMM)with a reinforced substrate structure was developed through a straightforward dip-coating technique.This MMM incorporates a polytetrafluoroethylene(PTFE)porous membrane as the supporting framework,while a composite of block polymer(styrene-butadiene-styrene)and metal-organic framework(Ni-MOF-74)forms the selective separation layer.Comprehensive characterization of Ni-MOF-74 and the fabricatedmembranes was conducted using X-rays diffraction,scanning electron microscope,Brunauer-Emmett-Teller analysis,and gas permeance tests.The findings indicate a robust integration of the PTFE porous support with the membrane layer,enhancing the mechanical stability of theMMM.Under optimal conditions,the mechanical strength of the PM20 membrane(containing 20%Ni-MOF-74)was observed to be 37.7 MPa,representing remarkable increase compared to the non-reinforcedMMM.Additionally,thePM20membrane exhibited an impressive CH4 permeation rate of 92 barrer(1 barrer﹦3.35×10^(-16)mol·m·m^(-2)·s^(-1)·Pa^(-1))alongside a CH_(4)/N_(2)selectivity of 4.18.These results underscore the MMM's substantial performance and its promising potential in methane enrichment applications.

关 键 词：Mixed matrix membrane CH_(4)/N_(2)separation MOF fillers Porous skeleton 

分 类 号：TQ051.893[化学工程]