Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 45, Issue 20, Pages 11449-11459Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2018.05.093
Keywords
Methane dry reforming; Ni loading silica; Hydrogen production; Mesoporous silica nanoparticles; Pumice rock
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Funding
- University of Mohammed V-Morocco [SCH 04/09]
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In this study, a new nano-sized mesoporous silica (MSN) as support for Ni-based catalysts was produced from natural resources and tested in the dry reforming of methane between 823 and 1023 K. The fresh and spent catalysts Ni-x/MSN (x = 5, 10 and 20 wt.%) were characterized by various techniques. All catalysts are selective for hydrogen production and exhibited long-term stability with low coke formation predominantly as carbon nanotubes, for Ni loadings less than 10% at 973 K. The catalytic results were correlated with the in situ generation of Ni nanoparticles which are highly dispersed on the MSN surface due to strong metal-support interactions thus preventing the sintering process. No significant deactivation was recorded along 25 h on stream meaning that the textural properties of the catalysts have not been altered by the coke deposition or reaction temperature. The prepared MSN is a potential support to be utilized for hydrogen generation. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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