Journal
ENERGY CONVERSION AND MANAGEMENT
Volume 103, Issue -, Pages 886-894Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.enconman.2015.07.033
Keywords
CO2 hydrogenation; Hierarchical meso-macroporous alumina; Methanol; Catalyst; Deactivation; Stability
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Funding
- Thailand Research Fund [TRG5780258]
- Center of Excellence on Petrochemical and Materials Technology (PETROMAT)
- National Research University Project of Thailand (NRU)
- Nanotechnology Center (NANOTEC)
- NSTDA
- Ministry of Science and Technology, Thailand through its program of Center of Excellence Network
- Rayong Institute of Science and Technology Foundation
- Kasetsart University Research and Development Institute (KURDI)
- Faculty of Engineering, Kasetsart University
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Effects of pore structures of alumina on the catalytic performance of copper catalysts for CO2 hydrogenation were investigated. Copper-loaded hierarchical meso-macroporous alumina (Cu/HAl) catalyst exhibited no significant difference in terms of CO2 conversion with copper-loaded unimodal mesoporous alumina (Cu/UAl) catalyst. However, the selectivity to methanol and dimethyl ether of the Cu/HAl catalyst was much higher than that of the Cu/UAl catalyst. This was attributed to the presence of macropores which diminished the occurrence of side reaction by the shortening the mesopores diffusion path length. The Cu/HAl catalyst also exhibited much higher stability than the Cu/UAl catalyst due to the fast diffusion of water out from the catalyst pellets, alleviating the oxidation of metallic copper to CuO. (C) 2015 Elsevier Ltd. All rights reserved.
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