Production of synthesis gas and synthesis gas derived products
AssigneeSasol Technology (Proprietary) Limited
InventorsMartin Jakobus Keyser, Margaretha Coertzen
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Abstract
A process (10) for producing synthesis gas includes, in a gasification stage (12), gasifying a carbonaceous feestock to provide a raw synthesis gas which includes at least H2, CO and CH4 and, in a partial oxidation stage (14), subjecting the raw synthesis gas to partial oxidation in the presence of oxygen to provide an upgraded synthesis gas which includes less CH4 and more H2 and CO than the raw synthesis gas. The invention extends to a process for producing a synthesis gas derived product.
Claims14
A process for producing synthesis gas, the process including in a gasification stage, gasifying a carbonaceous feedstock in the presence of steam and oxygen and at a temperature below an ash fusion temperature of the carbonaceous feedstock to provide a raw synthesis gas which includes at least H2, CO, CH4, higher hydrocarbons, tars and solids;
- feeding the raw synthesis gas, including higher hydrocarbons, tars and solids, to a partial oxidation stage;
- and
- in the partial oxidation stage, partially oxidising the CH4 to produce CO and H2 and cracking and combusting the tars and higher hydrocarbons by subjecting the raw synthesis gas to partial oxidation in the presence of oxygen thereby to provide an upgraded synthesis gas which is substantially free of heavier hydrocarbons and which includes less CH4 than the raw synthesis gas.
Dependencies are inferred from the claim text.