期刊
SOLID STATE IONICS
卷 178, 期 7-10, 页码 717-722出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ssi.2007.02.029
关键词
proton conductor; heterogenous catalysis; reverse water gas shift
The proton conductors Sr3CaZr0.5Ta1.5O8.75 (SCZT), BaCe0.9Y0.1O2.95 (BCY10) and Ba3Ca1.18Nb1.82O8.73(BCN18) have been shown to be active heterogeneous catalysts for the reverse water gas shift (RWGS) reaction. Catalytic characterisation was conducted in a quartz fixed-bed reactor with a silica fritted disk and monitored by a gas chromatograph. X-ray diffraction and TGA+MS were used to characterise samples before and after catalytic tests. BCY10 reaches 45% CO2 conversion at 900 degrees C, 3% more than BCN18 (42% total conversion) at 900 degrees C. SCZT reaches 36% CO2 conversion at 900 degrees C, but has the lowest conversion onset temperature and activation energy of the materials studied. (c) 2007 Elsevier B.V. All rights reserved.
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