Patent ID: 8273323
Filing Date: 2012-09-25
Classification: B01D,C01B,C10J,C10K,Y02C,Y02P

Abstract:
1. A process for producing hydrogen from hydrocarbonaceous educts in which the starting material is autothermally gasified by non-catalytic partial oxidation in a first reaction stage by adding oxygen-containing gas and steam at a temperature of 1200 to 1500° C. and a pressure of 15 to 100 bar abs to obtain a raw gas containing H 2 and CO as main components as well as the components CO 2 , H 2 O, CH 4 and traces of H 2 S, COS, C n H m , N 2 and Ar, and the metal ashes contained in the raw gas are removed as molten slag together with the soot by means of quenching, and in a second reaction stage the CO contained in the raw gas is converted to CO 2 and further H 2 by adding steam, wherein the converted raw synthesis gas leaving the second reaction stage is separated into high-purity H 2 and into a gas mixture containing 0.5 to 10 vol-% of H 2 S, 50 to 95 vol-% of CO 2 , 5 to 20 vol-% of H 2 , 0.1 to 10 vol-% of CO and 0.1 to 10 vol-% of CH 4 , Ar, N 2 by a pressure-swing absorption process in a third stage, the gas mixture is supplied to a tail gas wash of a Claus process, H 2 S selectively separated from the gas mixture is introduced into the feed gas of the Claus process, and the desulfurized waste gas of the tail gas wash, mixed with the tail gas of the Claus process, is burnt.