Integrated energy and/or synthesis gas production method by in-situ oxygen production, chemical looping combustion and gasification

A method of producing energy and/or synthesis gas through gasification of at least one liquid and/or solid feed in at least one chemical loop comprising at least four distinct oxidation, reduction, gasification and oxygen production reaction zones, wherein:

• a) oxygen is produced in an oxygen production reaction zone R2 by exposing an oxygen carrier solid comprising a metallic oxide, in its state of maximum oxidation, to a gaseous atmosphere with a low oxygen partial pressure comprising a carrier gas comprising reduction effluents;
• b) the oxygen produced in stage a) is transported by means of the carrier gas to a gasification reaction zone R4 and gasification of the liquid and/or solid feed is carried out by contacting said oxygen-enriched carrier gas at high temperature with said feed so as to produce synthesis gas CO+H2;
• c) reduction of the oxygen carrier solid is carried out so as to release oxygen allowing to oxidize the synthesis gas, in a reduction reaction zone R3, the reduction reaction in said reduction reaction zone being exothermic;
• d) the oxygen carrier solid that has been at least partly reduced to provide the system with oxygen is oxidized on contact with air so as to recover its maximum oxidation state, in an oxidation reaction zone R1,
• and wherein the heat provided by the reactions involved in said oxidation reaction zone R1 and in said reduction reaction zone R3 is used to allow energetic operation of the method.