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Title: Synthesis, characterization and catalytic performances of Ce-SBA-15 supported nickel catalysts for methane dry reforming to hydrogen and syngas
Authors: Wang, N.
Chu, W.
Zhang, T.
Zhao, X.S. 
Keywords: Cerium-incorporated SBA-15
High catalytic performance
Hydrogen production
Methane dry reforming
Nano nickel catalyst
Issue Date: Jan-2012
Citation: Wang, N., Chu, W., Zhang, T., Zhao, X.S. (2012-01). Synthesis, characterization and catalytic performances of Ce-SBA-15 supported nickel catalysts for methane dry reforming to hydrogen and syngas. International Journal of Hydrogen Energy 37 (1) : 19-30. ScholarBank@NUS Repository.
Abstract: A series of Ce-incorporated SBA-15 mesoporous materials were synthesized through direct hydrothermal synthesis method and further impregnated with 12 wt.% Ni. The samples were characterized by ICP-AES, XRD, N 2 physisorption, XPS, TPR, H 2 chemisorption, TGA, temperature- programmed hydrogenation (TPH) and TEM measurements. The low-angle XRD and N 2 physisorption results showed the Ce successfully incorporated into the framework of SBA-15. The catalytic properties of these catalysts were investigated in methane reforming with CO 2. The Ce/Si molar ratio had a significant influence on the catalytic performance. The highest catalytic activity and long-term stability were obtained over the Ni/Ce-SBA-15 (Ce/Si = 0.04) sample. The improved catalytic behavior could be attributed to the cerium impact in the framework of SBA-15, where cerium promoted the dispersion of nano-sized Ni species and inhibited the carbon formation. In comparison with the effect of CeO 2 crystallites in SBA-15, cerium in the framework of SBA-15 promoted the formation of the nickel metallic particles with smaller size. The XRD and TGA results exhibited that carbon deposition was responsible for activity loss of Ni/SBA-15 and Ni/Ce-SBA-15 (Ce/Si = 0.06) catalysts. TEM results showed that the hexagonal mesopores of SBA-15 were still kept intact after reaction and the pore walls of SBA-15 prevented the aggregation of nickel. © 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Source Title: International Journal of Hydrogen Energy
ISSN: 03603199
DOI: 10.1016/j.ijhydene.2011.03.138
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