화학공학소재연구정보센터
International Journal of Hydrogen Energy, Vol.35, No.9, 4020-4026, 2010
Efficient hydrogen supply through catalytic dehydrogenation of methylcyclohexane over Pt/metal oxide catalysts
This paper describes the results of experiments on dehydrogenation of methylcyclohexane over Pt supported on metal oxides (Pt/MO) and Pt supported on perovskite (Pt/Per) catalysts. The reaction is being considered as a means for delivery of hydrogen to fueling stations in the form of more easily transportable methylcyclohexane. Among Pt/MO catalysts, the best activity as determined by the hydrogen evolution rate was observed over Pt/La(2)O(3) catalyst at 21.1 mmol/g(met)/min. Perovskite:supported catalysts exhibited relatively higher activity and selectivity, with Pt/La(0.7)Y(0.3)NiO(3) giving the best performance. This Pt/Per catalyst had an activity of ca 45 mmol/g(met)/min with nearly 100% selectivity towards dehydrogenation. The catalysts were characterized using XRD, CO-chemisorption and SEM-EDXA techniques. The present study reports catalysts that minimize the use of Pt and explores tailoring the properties of the perovskite structure. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.