A method of forming a syngas for producing liquid hydrocarbons

Abstract

A method of forming a syngas for producing liquid hydrocarbons, the method comprising: providing a feed gas comprising carbon dioxide, hydrogen and compounds of sulfur; providing a carbon-monoxide-enriched feed gas by passing the feed gas to a reverse-water-gas-shift reaction chamber to convert a portion of the carbon dioxide and a portion of the hydrogen to carbon monoxide and water, and to convert at least a portion of the compounds of sulfur to hydrogen sulfide; passing the carbon-monoxide-enriched feed gas to a carbon-dioxide-removal unit to provide the syngas and a carbon-dioxide-enriched stream, the carbon-dioxide-enriched stream comprising carbon dioxide and hydrogen sulfide; providing a purified carbon-dioxide stream by passing the carbon-dioxide-enriched stream to a hydrogen-sulfide-removal unit to remove hydrogen sulfide from the carbon-dioxide-enriched stream; and recycling the purified carbon-dioxide stream into the feed gas.

Dependencies are inferred from the claim text.