High-performance SSZ-13 membranes prepared using ball-milled nanosized seeds for carbon dioxide and nitrogen separations from methane  

作　　者：Xinping Li Yaowei Wang Tangyin Wu Shichao Song Bin Wang Shenglai Zhong Rongfei Zhou 

机构地区：[1]State Key Laboratory of Materials-Oriented Chemical Engineering,College of Chemical Engineering,Nanjing Tech University,Nanjing 210009,China [2]Shandong Chambroad Petrochemicals Co.,Ltd,Binzhou 256500,Shandong,China

出　　处：《Chinese Journal of Chemical Engineering》2020年第5期1285-1292,共8页中国化学工程学报（英文版）

基　　金：the financial support of this study from National Key Research and Development Program of China(No.2017YFB0603402);the National Natural Science Foundation of China(No.21576131,21938007 and 21366013);support of Jiangsu College Student Innovation Training Project(201910291049Z)。

摘　　要：SSZ-13 membranes with high separation performances were prepared using ball-milled nanosized seeds by once hydrothermal synthesis.Separation performances of SSZ-13 membranes in CO2/CH4 and N2/CH4 mixtures were enhanced after synthesis modification.Single-gas permeances of CO2,N2 and CH4 and ideal selectivities were recorded through SSZ-13 membranes.The effects of temperature,pressure,feed flow rate and humidity on separation performance of the membranes were discussed.Three membranes prepared after synthesis modifications had an average CO2 permeance of 1.16×10-6 mol·(m2·s·Pa)-1(equal to 3554 GPU)with an average CO2/CH4 selectivity of 213 in a 50 vol%/50 vol%CO2/CH4 mixture.It suggests that membrane synthesis has a good reproducible.The membrane also displayed a N2 permeance of 1.07×10-7 mol·(m2·s·Pa)-1(equal to 320 GPU)with a N2/CH4 selectivity of 13 for a 50 vol%/50 vol%N2/CH4 mixture.SSZ-13 membrane displayed stable and good separation performance in the wet CO2/CH4 mixture for a long test period over 100 h at 348 K.The current SSZ-13 membranes show great potentials for the simultaneous removals of CO2 and N2 in natural gas purification as a facile process suitable for industrial application.

关 键 词：Carbon/methane separation Nitrogen/methane separation CHA membrane Natural gas purification 

分 类 号：TQ051.893[化学工程]