Process for cleaning gases form gasification units

Abstract

A process for cleaning gases from a gasification unit comprising the steps of: gasifying a fuel to raw synthesis gas comprising carbon monoxide and steam in a gasification reactor in the presence of a calcium-containing compound and steam removing halogen compounds from the raw synthesis gas catalytic conversion of carbon monoxide and steam in the raw synthesis gas to carbon dioxide and hydrogen in a water gas shift conversion step to provide a shifted gas contacting the shifted gas with a solid sulphur sorbent regenerating the solid sulphur sorbent by passing a stream of steam through the solid sulphur sorbent counter current to the flow direction of the shifted gas to provide a hydrogen sulphide-containing stream of steam transferring the hydrogen sulphide-containing stream of steam from the solid sulphur sorbent directly to the gasification reactor removing the cleaned shifted gas from the solid sulphur sorbent.

Dependencies are inferred from the claim text.