Hydrogen Formation with Use of a Flow-type Pulse Reactor for Catalytic Decalin Dehydrogenation

Abstract

The reversible pair of decalin dehydrogenation / naphthalene hydrogenation under mild reaction conditions, adoptable to long-term storage and long-distance transportation of hydrogen, was investigated with use of a flow-type reactor for decalin dehydrogeno-aromatization by affording pulsed liquid substrate to carbon-supported Pt catalysts. The amount ratio of catalyst-to-substrate was very sensitive to the rates of hydrogen evolution as well as of its evaporation, as was found with a bath-wise reactor. Simultaneous pursuits in the flow reactor with respect to catalyst-layer temperatures, evolved amounts of hydrogen and condensate compositions were useful for elucidating the superheated liquid-film states of dehydrogenation catalysts.