Patent ID: 8709113
Filing Date: 2014-04-29
Classification: C10J,F01K,Y02E,Y02P

Abstract:
1. A process for converting a carbonaceous feedstock into a plurality of gaseous products, the process comprising the steps of: (A) supplying a biomass feedstock to a reactor, wherein the biomass feedstock (i) is in particulate form, or (ii) comprises an aqueous slurry; (B) at least partially combusting the biomass feedstock in the reactor in the presence of an oxygen-containing gas and under suitable temperature and pressure to generate heat energy and an exhaust comprising carbon dioxide; (C) utilizing the heat energy to generate steam; (D) introducing a carbonaceous feedstock, an alkali metal gasification catalyst, and at least a portion of the steam to a gasifier; (E) reacting the carbonaceous feedstock in the gasifier in the presence of the steam and the alkali metal gasification catalyst, at a temperature of at least 450° C. to about 900° C., and at a pressure of at least about 400 psig to about 1000 psig, to form a gas stream comprising a plurality of gaseous products comprising methane and at least one or more of hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, ammonia and other higher hydrocarbons; and (F) at least partially separating the plurality of gaseous products to produce a product stream comprising a predominant amount of one of the gaseous products, wherein the exhaust produced from the at least partial combustion of the biomass feedstock is provided to the gasifier and the gas stream comprises carbon dioxide generated from the at least partial combustion of the biomass feedstock and the catalytic gasification of the carbonaceous feedstock.