Patent ID: 7455828
Filing Date: 2008-11-25
Classification: C01B,Y02E,Y10S

Abstract:
1. A process for obtaining a hydrogen product from a feed gas consisting essentially of an acid gas, comprised of hydrogen sulfide, comprising the following steps: (a) first separating the feed gas to obtain a first purified hydrogen sulfide fraction from the feed gas, wherein the first purified hydrogen sulfide fraction is comprised of at least about 90 percent hydrogen sulfide by volume; (b) dissociating hydrogen sulfide present in the first purified hydrogen sulfide fraction into elemental hydrogen and elemental sulfur to convert the first purified hydrogen sulfide fraction into a dissociated first purified hydrogen sulfide fraction, wherein the dissociated first purified hydrogen sulfide fraction is comprised of elemental hydrogen and elemental sulfur; (c) second separating the dissociated first purified hydrogen sulfide fraction to obtain a hydrogen rich fraction from the dissociated first purified hydrogen sulfide fraction, wherein the hydrogen rich fraction is comprised of elemental hydrogen; and (d) obtaining the hydrogen product from the hydrogen rich fraction, wherein the hydrogen product is comprised of elemental hydrogen.