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000861381 1001_ $$0P:(DE-Juel1)162508$$aNgamou, P. H. Tchoua$$b0$$eCorresponding author
000861381 245__ $$aHigh-performance carbon molecular sieve membranes for hydrogen purification and pervaporation dehydration of organic solventsiek
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000861381 520__ $$aUltrathin (∼200 nm) and defect-free carbon molecular sieve (CMS) membranes were successfully fabricated on the inner surface of hierarchically structured porous supports (γ-Al2O3 layer coated α-Al2O3 tubes) via pyrolysis of a polyimide precursor at 700 °C. The chemical structure of the carbonized samples was examined in detail by means of Raman spectroscopy and X-ray photoelectron spectroscopy. From these studies, it was found that the carbonized samples consist of graphitic carbon layers containing sp3-type defects. The synthesized CMS membranes showed an unprecedentedly high H2 permeance of up to 1.1 × 10−6 mol m−2 s−1 Pa−1 and ideal separation factors of 24, 130 and 228 for H2/CO2, H2/N2 and H2/CH4, respectively at 200 °C. Furthermore, outstanding separation factors of 791 and 1946 with a water flux of about 0.5 kg m−2 h−1 were obtained at 70 °C for the pervaporation of 10 wt% water-containing binary mixtures of methanol and ethanol, respectively. These results unambiguously show that the carbon membranes developed in this work possess the potential for high-temperature hydrogen purification and dewatering of organic solvents.
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000861381 7001_ $$0P:(DE-Juel1)129617$$aIvanova, M. E.$$b1
000861381 7001_ $$0P:(DE-Juel1)161591$$aGuillon, O.$$b2
000861381 7001_ $$0P:(DE-Juel1)129637$$aMeulenberg, Wilhelm Albert$$b3$$ufzj
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