Patent ID: 7741377

Claim:
A process to prepare a paraffinic hydrocarbon from a solid carbonaceous feedstock by performing the following steps, (a) feeding an oxygen comprising gas and the carbonaceous feedstock to a burner positioned horizontal and firing into a reactor vessel, (b) performing a partial oxidation of the carbonaceous feedstock in said burner to obtain a stream of hot synthesis gas which flows upwardly relative to the burner and a liquid slag which flows downwardly relative to the burner, (c) cooling the hot synthesis gas by first cooling the gas to a temperature of between 500 and 900° C. by injecting a gaseous or liquid cooling medium into the synthesis gas and subsequently cooling the gas to below 500° C. by directly contacting with water, (d) separating solids from the cooled synthesis gas by means of a water scrubbing process step, (e) performing a water shift reaction on at least part of the scrubbed synthesis gas, (f) separating sulphur compounds, carbon dioxide and other possible impurities from the shifted gas to obtain a purified synthesis gas, and (g) performing a Fischer-Tropsch synthesis using the purified synthesis gas of step (f) to obtain a synthesis product comprising paraffinic hydrocarbons.