Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 37, Issue 3, Pages 2699-2707Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2011.10.107
Keywords
Greenhouse gas abatement; Methane dry reforming; Hydrogen; Syngas; Rh-CeO2 catalyst
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Funding
- Ministry of Education, Science and Technology of the Republic of Slovenia [P2-0150, P2-0152]
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2% Rh-CeO2 catalyst was synthesized using the hard template method and characterized by means of N-2 adsorption/desorption, XRD and H-2-TPR methods. The prepared powdered catalyst exhibited high thermal stability and high surface area with negligible sintering during 24-h exposure to 973 K in an inert atmosphere. During the temperature programmed methane dry reforming reaction between 473 and 1073 K, an increase in the molar H-2/CO ratio from 0.3 at 623 K to as high as 0.96 at 1073 K was observed. Besides H-2 and CO, H2O was identified among reaction products, originating from the simultaneously occurring reverse water-gas shift reaction. During the isothermal test performed at 923 K, the 2% Rh-CeO2 catalyst exhibited stable performance and produced syngas with the average H-2/CO ratio equal to 0.62. A relative drop of catalyst activity equal to 11% was observed within 70-h time on stream at 1023 K, with the average H-2/CO ratio at the reactor outlet equal to 0.71. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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