PROCESS FOR REMOVING CONTAMINANTS FROM A GAS STREAM

摘要

The invention relates a process for removing contaminants, including sulphur compounds, from a gas stream comprising the steps of: (a) providing the gas stream which comprises a syngas; (b) subjecting at least part of the syngas to a treatment wherein the hydrogen content of the syngas is increased; (c) contacting at least part of the gas mixture as obtained in step (b) with an absorption liquid that absorbs sulphur compounds to obtain a sulphur compounds-enriched absorption liquid and a sulphur compounds-depleted gas stream; (d) passing at least part of the sulphur compounds-depleted gas stream as obtained in step (c) through a bed of a solid adsorbent for adsorbing contaminants, including metal carbonyls, to obtain a metal carbonyls-depleted gas stream; and (e) passing at least part of the metal carbonyls-depleted gas stream as obtained in step (d) through at least one bed of a solid adsorbent that comprises copper and zinc oxide for the further removal of sulphur compounds and to obtain a sulphur compounds- depleted gas stream. The invention further relates to a synthesis process for preparing hydrogen, a hydrocarbon product or a chemical product wherein the sulphur compounds-depleted gas stream as obtained in step (e) of the present process is used as a reaction component.