On-board H-2 generation by catalytic dehydrogenation of hydrocarbon mixtures or fuels

The partial dehydrogenation (PDh) of hydrocarbon blends may be a suitable way to produce H-2 on-board of automotives or airplanes to feed fuel cells and produce electric power, avoiding storage problems. In this work very interesting data have been collected using Jet A-1 surrogate and Pt-Sn/beta-Al2O3 catalysts, operating at 450 degrees C and feeding the vaporised hydrocarbon blend without any carrier gas. The use of Pt/Sn catalyst with 1:1 (w/w) ratio leads to the best compromise between activity and stability with time-on-stream, due to the formation of Pt-rich alloys. Nevertheless, all studied catalysts exhibited limited thio-tolerance. In optimized reaction conditions, H-2 productivity of 3000 NL/kg(cat)/h, sufficient to produce 3 kW of electric power, considering purification steps and a fuel efficiency of 50%, was obtained. (C) 2011 Elsevier B.V. All rights reserved.