PROCESS FOR PRODUCING HYDROCARBONS

摘要

The invention relates to a process for the production of liquid hydrocarbons by the use of light-end fractions from downstream synthesis in the reforming section of the plant.

主权项

1. Process for the production of liquid hydrocarbons from a hydrocarbon feedstock comprising:
(a) combining a light-end fraction stream from the upgrading stage of step (g) with a stream of natural gas to form said hydrocarbon feedstock; (b) passing said hydrocarbon feedstock through a hydrogenation stage to form a hydrogenated feedstock; (c) passing the hydrogenated feedstock through a desulfurization stage to form a desulfurized feedstock; (d) passing the desulfurized feedstock through a pre-reforming stage under the addition of steam to form a pre-reformed gas; (e) passing the pre-reformed gas through an autothermal reformer (ATR) or Catalytic Partial Oxidation unit (CPO) under the addition of an oxidant gas to form a synthesis gas; (f) passing the synthesis gas through a Fischer-Tropsch synthesis stage to form a tail gas stream and a raw product stream of hydrocarbons; (g) passing the raw product stream of hydrocarbons through an upgrading stage to form a final product stream of liquid hydrocarbons and a light-end fraction stream, in which the light-end fraction stream comprises a C1-C6 fraction and C6+ fraction containing paraffinic and olefinic hydrocarbons, but no naphtha.