Process for the conversion of carbon-based material by a hybrid route combining direct liquefaction and indirect liquefaction in the presence of hydrogen resulting from non-fossil resources

Process for the conversion of carbon-based material to fuel bases, comprising the following stages:

• a) liquefaction of at least a portion of the said carbon-based material in the presence of hydrogen in at least one reactor comprising a supported catalyst as an ebullated bed,
• b) separation of the effluent obtained on conclusion of stage a) into at least one light fraction of fuel base hydrocarbons and a residual fraction comprising compounds boiling at at least 340° C.,
• c) production of hydrogen using at least one non-fossil resource, the hydrogen thus produced being at least in part introduced into the liquefaction stage a), and the subsequent reverse water gas reaction stage e) and subsequent Fischer-Tropsch reaction stage f),
• d) gasification of a portion of the carbon-based material and/or of a portion at least of the residual fraction resulting from stage b) in order to produce synthesis gas comprising hydrogen, CO and CO2, and a residual fraction from the gasification,
• e) separation of a portion at least of the CO2 present in the synthesis gas and conversion of the separated CO2 by a reverse water gas reaction in the presence of hydrogen resulting from stage c), to produce CO and water,
• f) conversion of the synthesis gas, supplemented with at least a portion of the CO resulting from stage e) and at least a portion of hydrogen resulting from stage c), by Fischer-Tropsch synthesis to give fuel bases.