Patent ID: 6852762

Claim:
A process for producing liquid hydrocarbons from a hydrocarbonaceous feedstock which comprises the following steps: (i) catalytically reforming at least part of the hydrocarbonaceous feedstock at elevated temperature and pressure with steam in at least one reforming zone; (ii) heating the reforming zone(s) by means of a carbon dioxide containing heating gas comprising a product obtained by partial oxidation of reformer product obtained in step (i) and carbon dioxide depleted light product obtained in step (vi) with an oxygen containing gas in an oxidation zone; (iii) separating carbon dioxide from cooled down heating gas obtained in step (ii); (iv) catalytically converting at least part of the carbon dioxide depleted gas stream obtained in step (iii) at elevated temperature and pressure into normally liquid hydrocarbons; (v) separating product steam obtained in step (iv) into a light product comprising mainly unconverted synthesis gas, inerts and light hydrocarbons and a heavy product comprising mainly normally liquid and solid hydrocarbons; (vi) separating carbon dioxide from light product obtained in step (v); and (vii) combining at least part of the carbon dioxide feed obtained in step (iii) and step (vi) with hydrocarbonaceous feed for step (i).