Process for gazifying carbon containing residues from mineral oils processing

摘要

In this process for gasifying carbon-containing residues from mineral oils processing under pressures from 20 to 60 bar with oxygen from an air separation plant, with addition of high-pressure steam and cooling of the hot reaction gases from about 1300 DEG C to 250-300 DEG C in a waste heat boiler with a downstream H2S (hydrogen sulphide) scrubbing, shift conversion of CO (carbon monoxide) and CO2 (carbon dioxide) scrubbing, crude H2 (hydrogen) is produced in addition to H2S and CO2. For the utilisation, which has particularly favourable energy balance and is non-polluting, of highly carbon-containing and especially sulphur-containing residues from mineral oils processing, a part stream of the H2S-free crude gas, consisting mainly of hydrogen and CO, is diverted via an expansion turbine as fuel gas for generating high-pressure steam which provides the drive energy both for the air separation plant and for a refrigeration unit for operating the H2S and CO2 scrubbing, and the quantity of steam required for the gasification reaction.