Journal
RENEWABLE ENERGY
Volume 79, Issue -, Pages 78-84Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2014.07.041
Keywords
Cerium hydroxy carbonate (CHC: Ce(OH) CO3); Nano-sized CeO2; Pt; Pre-calcination temperature; Aging time; Water gas shift (WGS)
Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2013R1A1A1A05007370]
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Crystalline cerium hydroxy carbonate (CHC: Ce(OH)CO3) was prepared by a novel precipitation/digestion method at room temperature in air. The nano-sized CeO2 supports were obtained by the thermal decomposition of CHC and the Pt/CeO2 catalysts were prepared by an incipient wetness impregnation method. The pre-calcination temperature and aging time were optimized to obtain a highly active Pt/CeO2 catalyst for the water gas shift reaction (WGS). The Pt/CeO2 catalyst exhibited the highest CO conversion (82%) and the lowest activation energy (55 kj/mol) at a very high gas hourly space velocity (GHSV) of 45,515 h(-1) when the optimized synthesis parameter (pre-calcined temperature = 400 degrees C and aging time = 4 h) was used in the synthesis of CeO2. This is mainly due to the high BET surface area, nano-sized CeO2, and intimate interaction between Pt and CeO2. (C) 2014 Elsevier Ltd. All rights reserved.
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