TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The non fossil resource is water, hydrochloric acid, hydrogen chloride, hydrogen sulfide and/or biomass. The carbon material is a filler comprising coal, biomass, algae, charges obtained from the oil and/or refining oil, products obtained from thermochemical conversion or hydrothermal conversion of charges and/or hydrocarbon wastes. Preferred Process: The producing hydrogen comprises decomposition of water by electrolysis, electrolysis at high temperature, thermochemical cycles and/or microorganisms. The producing hydrogen comprises: electrolysis of hydrochloric acid and/or reaction of hydrogen chloride with cerium dioxide; decomposition of hydrogen sulfide by heat treatment and/or by reaction of metal oxides; and gasification of biomass. The energy feeding the hydrogen production is a non-fossil energy comprising nuclear energy, solar photovoltaic energy, low temperature solar thermal energy, high temperature solar thermal energy, wind energy, hydraulic energy or hydroelectricity, ocean energy, geothermal and/or biomass. The process comprises hydrogen production by gasification of at least one selected fossil resource from coal, petroleum residue and/or residue obtained from the liquefaction, or by steam reforming of natural gas, unconventional gas rich in methane and/or light hydrocarbon fractions, where the hydrogen thus produced is in part or in whole introduced in at least one liquefaction step. The oxygen required for gasification is obtained from decomposition of water by electrolysis. The process comprises capturing and storing of carbon dioxide from emissions emitted during the production of utilities and/or in the hydrogen production. The process of carbon dioxide capture comprises absorption by amines and/or potassium carbonate. The effluent obtained after the liquefaction step undergoes separation of a gas phase, at least a light fraction of liquid hydrocarbons of naphtha, kerosene and/or diesel, vacuum gas oil fraction, a vacuum residue and a solid fraction that is in the vacuum residue. The vacuum gas oil fraction is recycled in whole or in part in the step (a). The light fraction and/or the vacuum gas oil fraction are subjected to a hydrotreating step/hydrocracking step, and with or without intermediate decompression.