Ultraselective carbon molecular sieve membrane for hydrogen purification  

作　　者：Ruisong Xu Liu He Lin Li Mengjie Hou Yongzhao Wang Bingsen Zhang Changhai Liang Tonghua Wang 

机构地区：[1]State Key Laboratory of Fine Chemicals,Group of Carbon Membranes and Porous Materials.School of Chemical Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China [2]Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,Liaoning,China [3]School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,Liaoning,China

出　　处：《Journal of Energy Chemistry》2020年第11期16-24,共9页能源化学（英文版）

基　　金：the National Key R&D Program of China(2017YFB0603403);National Natural Science Foundation of China(21676044,21878033,21978034);High Level Innovation Team of Liaoning Province(XLYC1908033);Fundamental Research Funds for the Central Universities(DUT19ZD211,DUT 2018TB02)for the financial support。

摘　　要：Hydrogen is a green clean fuel and chemical feedstock. Its separation and purification from hydrogencontaining mixtures is the key step in the production of hydrogen with high purity(>99.99%). In this work, carbon molecular sieve(CMS) membranes with ultrahigh permselectivity for hydrogen purification were fabricated by high-temperature(700–900 ℃) pyrolysis of polymeric precursor of phenolphthaleinbased cardo poly(arylene ether ketone)(PEK-C). The evolution of the microstructural texture and ultramicroporous structure and gas separation performance of the CMS membrane were characterized via TG-MS, FT-IR, XRD, TEM, CO2 sorption analysis and gas permeation measurements. CMS membranes prepared at 700 ℃ exhibited amorphous turbostratic carbon structures and high H2 permeability of 5260 Barrer with H2/CH4, H2/N2 and H2/CO selectivities of 311, 142, 75, respectively. When carbonized at900 ℃, the CMS membrane with ultrahigh H2/CH4 selectivity of 1859 was derived owing to the formation of the dense and ordered carbon structure. CMS membranes with ultrahigh permselectivity exhibit an attractive application prospect in hydrogen purification.

关 键 词：Hydrogen separation and purification Carbon molecular sieve membrane Ultrahigh selectivity High-purity hydrogen 

分 类 号：TQ051.893[化学工程] TQ116.2