Process for the conversion of a feed containing biomass for the production of hydrocarbons, by Fischer-Tropsch synthesis

An integrated process for the production of liquid hydrocarbons from a feed containing at least one fraction of biomass and optionally at least one fraction of another feed, said process comprising:

• a) pretreating said biomass fraction and optionally said at least one fraction of another feed comprising at least one of a1), a2), a4):
• a1) drying,
• a2) torrefaction,
• a4) grinding,
• b) optionally combining the resultant pre-treated biomass fraction and said at least one fraction of another feed which may or may not have been pre-treated,
• c) gasifying the resultant effluent obtained from b) and/or of the pre-treated fraction obtained from step a) and optionally of said at least one fraction of another feed introduced directly into gasification in an entrained flow reactor,
• d) conditioning a synthesis gas obtained from c), comprising:
• d1) scrubbing with water and fractionating said synthesis gas into at least two effluents:
• a first portion and a complementary portion,
• d2) eliminating halogenated compounds by passing said first portion through at least one suitable guard bed,
• d3) carrying out a water gas shift reaction on the effluent obtained from d2),
• d4) catalytic hydrolysis of COS and HCN compounds contained in said complementary portion from d1) into H2S and NH3,
• e) recombining at least one fraction of each of the effluents obtained from d3) and d4),
• f) scrubbing the recombined effluent obtained from e) with water in order to eliminate impurities,
• g) eliminating acid gases CO2 and H2S contained in the effluent from f) with one or more chemical or physical solvents, used alone or as a mixture,
• h) finally purifying the synthesis gas obtained from g) over at least one guard bed in order to adsorb traces of impurities,
• i) subjecting the effluent obtained from h) to a catalytic Fischer-Tropsch synthesis reaction.