Patent ID: 8765019
Filing Date: 2014-07-01
Classification: C01B,C10G

Abstract:
1. Process for the preparation of synthesis gas from an essentially dry hydrocarbon feedstock comprising olefins, hydrogen and carbon monoxide, the process comprising the following steps: (a) selectively hydrogenating the olefins in the hydrocarbon feedstock at a temperature between 60 and 190° C. to obtain a hydrogenated hydrocarbon feedstock comprising hydrogen, carbon monoxide and saturated hydrocarbons, wherein selectively hydrogenating the olefins in the hydrocarbon feedstock is conducted without introduction of steam or water in either an isothermal reactor, or in an adiabatic reactor in which the inlet temperature is in a range of 70 to 120° C., and the outlet temperature is in a range of 140 to 190° C.; (b) adding steam to the hydrogenated hydrocarbon feedstock; (c) performing a water gas shift reaction in the presence of steam on the hydrogenated hydrocarbon feedstock to obtain a shifted, hydrogenated hydrocarbon mixture; and (d) performing partial oxidation or reforming of the shifted, hydrogenated hydrocarbon mixture, wherein the partial oxidation or reforming forms a synthesis gas having a molecular hydrogen-to-carbon monoxide-molar ratio lower than or equal to 2.6.