Hydrogen storage by decalin/naphthalene pair and hydrogen supply to fuel cells by use of superheated liquid-film-type catalysis

Platinum-rhenium composite catalysts supported on granular activated carbon in “superheated liquid-film” states gave excellent reactivities for decalin dehydrogenation, where the conversion of almost 100% from decalin to naphthalene was attained within 1 h by heating at 280 °C in a batch-wise reactor. “Superheated liquid-film” conditions were also realized in a continuous-type reactor at the same temperature (280 °C). With the goal of maintaining rapid evolution of hydrogen stationarily, a rather wide range of decalin feed rates was allowable with use of platinum particles supported on activated carbon cloth. Decalin should be evaluated as an organic chemical hydride not only because of its storage densities but also because of its potential power densities for fuel-cell vehicles.