期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 56, 期 27, 页码 7760-7763出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201701851
关键词
carbon membranes; carbon dioxide; gas separation; molecular sieves; polymer carbonization
Carbon membranes have great potential for highly selective and cost-efficient gas separation. Carbon is chemically stable and it is relative cheap. The controlled carbonization of a polymer coating on a porous ceramic support provides a 3D carbon material with molecular sieving permeation performance. The carbonization of the polymer blend gives turbostratic carbon domains of randomly stacked together sp(2) hybridized carbon sheets as well as sp(3) hybridized amorphous carbon. In the evaluation of the carbon molecular sieve membrane, hydrogen could be separated from propane with a selectivity of 10000 with a hydrogen permeance of 5 m(3)(STP)/(m(2)hbar). Furthermore, by a post-synthesis oxidative treatment, the permeation fluxes are increased by widening the pores, and the molecular sieve carbon membrane is transformed from a molecular sieve carbon into a selective surface flow carbon membrane with adsorption controlled performance and becomes selective for carbon dioxide.
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