Interaction between a bimetallic Ni-Co catalyst and micrometer-sized CaO for enhanced H2 production during cellulose decomposition
No Thumbnail Available
Date
2011-01-01
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
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 H2O. 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 H2 generation could not be enhanced by using more of a single additive. However, the combination of both the additives dramatically promoted selective H2 generation. The mechanism of their interaction is discussed. When the catalyst, CaO, and 1 vol.% H2O were present, a stable sustained (interval of >150 °C) high-rate (max >80 vol.%) H2 output resulted. The cumulative H2 yield (250–550 °C) reached 688 ml/g cellulose and the H2 selectivity during this period was nearly 70 vol.%. The char yield was also minimized, at 5.2%. © 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd.
Description
Keywords
Catalysts, Cellulose, Calcium oxides, Hydrogen production, Decomposition, Cobalt, Niobium, Bimetals
Citation
Zhao, M., Yang, X. S., Church, T. L., Harris, A. T., (2012). Interaction between a bimetallic Ni-Co catalyst and micrometer-sized CaO for enhanced H-2 production during cellulose decomposition. International Journal of Hydrogen Energy, 37(2), 421-431. doi:10.1016/j.ijhydene.2010.09.053