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Title: Interaction between a bimetallic Ni-Co catalyst and micrometer-sized CaO for enhanced H2 production during cellulose decomposition
Authors: Zhao, M
Yang, X
Church, TL
Harris, AT
Keywords: Cellulose
Issue Date: 1-Jan-2011
Publisher: ELSEVIER
Citation: Zhao, M., Yang, X.S., Church, T.L., Harris, A.T. (2011). Interaction between a bimetallic Ni-Co catalyst and micrometer-sized CaO for enhanced H(2) production during cellulose decomposition. International Journal of Hydrogen Energy, 36(1), 421-431.
Abstract: An SBA-15 supported Ni-Co catalyst and micrometer-sized CaO were used as additives in cellulose decomposition in the presence and absence of injected H(2)O. A thermogravimetric analyser coupled to a mass spectrometer (TG-MS) was used to examine the different roles of the Ni-Co catalyst and CaO in tuning the kinetics of decomposition and the distribution of the gaseous products. There existed optimal additive/cellulose ratios beyond which H(2) generation could not be enhanced by using more of a single additive. However, the combination of both the additives dramatically promoted selective H(2) generation. The mechanism of their interaction is discussed. When the catalyst, CaO, and 1 vol.% H(2)O were present, a stable sustained (interval of > 150 degrees C) high-rate (max > 80 vol.%) H(2) output resulted. The cumulative H(2) yield (250-550 degrees C) reached 688 ml/g cellulose and the H(2) selectivity during this period was nearly 70 vol.%. The char yield was also minimized, at 5.2%. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
ISSN: 0360-3199
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