Method and apparatus for producing liquid biofuel from solid biomass

A method for producing liquid hydro carbonaceous product (1) such as biofuel from solid biomass (2), characterized by the method comprising:

• a gasifying step for gasifying solid biomass (2) in a fluidized bed gasifier (6) at 750-850° C. to produce raw synthesis gas (3),
• conditioning of the raw synthesis gas (3) to purify the raw synthesis gas (3) to obtain purified synthesis gas (4) having a molar ratio of hydrogen to carbon monoxide between 2.5 to 1 and 0.5 to 1, preferably to between 2.1 to 1 and 1.8 to 1, more preferably about 2 to 1, wherein one of the conditioning steps is a catalytic treatment in a reformer (18), one of the conditioning steps is a water-gas-shift reaction in a water-to-gas shift reactor (21) and the last conditioning step is sulfur removal in a guard bed and
• subjecting purified synthesis gas (4) to a Fischer-Tropsch synthesis in a Fischer-Tropsch reactor (5) to produce liquid hydro carbonaceous product (1).