The influence of supported Ni catalysts on the product gas distribution and H<inf>2</inf> yield during cellulose pyrolysis

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Journal Article
Applied Catalysis B: Environmental, 2009, 92 (1-2), pp. 185 - 193
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Two groups of Ni catalysts, supported on γ-Al2O3 and MCM-41, respectively, were prepared by incipient wetness impregnation and tested for their influence on the pyrolytic decomposition of cellulose. A thermogravimetric analyser coupled with a mass spectrometer (TG-MS) was used to examine the influence of catalyst loading, support material, and the presence of additional water vapour on H2 selectivity. Normalization of the raw MS data enabled semi-quantitative analysis of the product gas distribution, which facilitated reliable comparison between different experimental conditions. Catalysts were characterized by BET, XRD, SEM/EDX and TEM. MCM-41 supported Ni significantly elevated the yield of H2 and total gaseous product, both under Ar and with the injection of additional water vapour when compared with the γ-Al2O3 support. 15 wt.%Ni/γ-Al2O3 and 5 wt.%Ni/MCM-41 were identified as the most active catalysts from the two groups with regards to H2 selectivity and yield. © 2009 Elsevier B.V. All rights reserved.
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