Abstract: The present invention relates to a gasification process of a solid carbonaceous material by catalysis in molten salts. A carbonaceous material is contacted, for a defined period in the presence of air with a first molten salt bath. The first molten salt bath includes at least one chloride type salt chosen from NaCl, MgCl2, CaCl2, KCl, FeCl2 and which has a melting point greater than or equal to 300° C., a density greater than 1 measured in the liquid state and at atmospheric pressure. The gases formed are recovered, and are contacted with a second molten salt bath optionally different from said first bath and, at the outlet of said second bath, the recovered gases are either stored optionally under pressure, or reinjected into said first bath or said second bath.