【摘 要】
：
Hydrogen is a green clean fuel and chemical feedstock.Its separation and purification from hydrogen-containing mixtures is the key step in the production of hyd
【机 构】
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State Key Laboratory of Fine Chemicals, Group of Carbon Membranes and Porous Materials, School of Ch
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Hydrogen is a green clean fuel and chemical feedstock.Its separation and purification from hydrogen-containing 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 phenolphthalein-based cardo poly(arylene ether ketone) (PER-C).The evolution of the microstructural texture and ultramicroporous structure and gas separation performance of the CMS membrane were characterized via TG-MS,Fr-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 at 900 ℃,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.
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