| 摘要 |
Hydrogen transportation and delivery to the fueling stations independent of permanent hydrogen transport infrastructure such as pipelines is an important aspect for penetration of hydrogen based energy to mass applications. A method useful for storage and supply of hydrogen at near ambient conditions is storage of hydrogen in hydrogenated liquid organic compounds. The hydrogen from hydrogenated liquid organic compounds can be released through catalytic dehydrogenation reaction. This invention describes the catalysts for dehydrogenation of hydrogenated liquid organic compounds. This consists of two different types of catalysts with general formula M/support and M-M'/support. Where in case of M/support M is at least one metal selected from Pt, Pd, Rh, Ru, Ir, Os and support is metal oxide at least one selected from Y 2 O 3 or V 2 O 5 or combinations thereof. In the second type of catalysts M-M'/support, metal M is at least one metal selected from group 11 of periodic table metals Cu, Ag, Au and metal M' is at least one metal selected from Pt, Pd, Rh, Ru, Ir, Os, Fe, Ni, Re, Mo, W, V, Cr, Co or combinations thereof well dispersed on high surface area supports such as activated carbon, alumina, alumite, zirconia, silica or combinations thereof. The addition of second metal selected from Pt, Pd, Rh, Ru, Ir, Os, Fe, Ni, Re, Mo, W, V, Cr, Co and at least one metal selected from group 11 metals such as Cu, Ag and AU exhibits the synergistic effects of spillover, migration, and recombinations of hydrogen over metallic catalysts having minimum of two metals resulting in shifting of equilibrium to dehydrogenation reaction. The catalyst is placed in a reactor with minimum diffusion area. The reactor is heated, preferably by using renewable energy sources, such as a solar concentrator. The catalysts in this invention provice relatively high activity and selectivity for delivery of hydrogen for fuel cell applications. The method of using hydrogenated liquid organic hydride is useful for efficient storage and transportation of hydrogen. |
