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Oxidative coupling of methane in dense ceramic membrane reactor with high yields
Author(s) -
Akin F. T.,
Lin Y. S.
Publication year - 2002
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690481019
Subject(s) - permeation , membrane , membrane reactor , oxidative coupling of methane , yield (engineering) , methane , selectivity , chemistry , ceramic , oxygen , partial oxidation , ceramic membrane , materials science , chemical engineering , analytical chemistry (journal) , chromatography , catalysis , organic chemistry , metallurgy , biochemistry , engineering
Abstract Oxidative coupling of methane (OCM) was studied with dense tubular Bi 1.5 Y 0.3 Sm 0.2 O 3 (BYS) membranes at various temperatures (870–930°C). BYS powders were synthesized by a citrate method. Tubular‐shaped dense membranes of BYS in the fluorite‐type FCC phase structure were fabricated by cold isostatic pressing with green machining. The best one‐pass C 2 (C 2 H 4 + C 2 H 6 ) yield achieved for OCM in the BYS dead‐end membrane reactor was 35% at a C 2 selectivity of 54% at 900°C. At the same C 2 yield, the membrane reactor mode gives C 2 selectivity of over 200% higher than the cofeed mode in the same membrane reactor under similar conditions. The oxygen permeation fluxes through tubular BYS membrane reactors under OCM reaction conditions are approximately 1.5 to 3.5 times higher than those under oxygen permeation conditions with He as the purge. After 6 days of OCM, BYS membrane remained in good integrity with minor phase segregation observed at the reaction side of the membrane.