期刊
CATALYSIS COMMUNICATIONS
卷 11, 期 10, 页码 901-906出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.catcom.2010.03.020
关键词
CO hydrogenation; CO2 hydrogenation; Rh/TiO2; Rh-Fe/TiO2; Methane; Ethanol
资金
- University of Virginia
- Chemical Sciences, Geosciences, and Biosciences Division, Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy [DE-FG02-95ER14549]
The hydrogenation of CO, CO + CO2, and CO2 over titania-supported Rh, Rh-Fe, and Fe catalysts was carried out in a fixed-bed micro-reactor system nominally operating at 543 K, 20 atm, 20 cm(3) min(-1) gas flow (corresponding to a weight hourly space velocity (WHSV) of 8000 cm(3)g(cat)(-1) h(-1)), with a H-2:(CO + CO2) ratio of 1:1. A comparative study of CO and CO2 hydrogenation shows that while Rh and Rh-Fe/TiO2 catalysts exhibited appreciable selectivity to ethanol during CO hydrogenation, they functioned primarily as methanation catalysts during CO2 hydrogenation. The Fe/TiO2 sample was primarily a reverse water gas shift catalyst. Higher reaction temperatures favored methane formation over alcohol synthesis and reverse water gas shift. The effect of pressure was not significant over the range of 10 to 20 atm. (C) 2010 Elsevier B.V. All rights reserved.
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