An oxygen fired fluidized bed combustor system (Oxy-FBC) is provided. The system provides means of producing a nearly pure stream of carbon dioxide for storage at high efficiency by controlling the oxygen content within certain regions of the combustor to control the rate of heat release allowing efficient transfer of heat from the combustor to the boiler tubes while avoiding excessively high temperatures that will cause ash melting, and simultaneously remove sulphur from the combustor via sorbents such as limestone and dolomite. The present invention utilizes a coarse oxygen carrier bed material to distribute heat and oxygen throughout an Oxy-FBC, while injecting fine sulphur sorbent that will continuously be removed from the bed.

An oxygen fired fluidized bed combustor system (Oxy-FBC) is provided. The system provides means of producing a nearly pure stream of carbon dioxide for storage at high efficiency by controlling the oxygen content within certain regions of the combustor to control the rate of heat release allowing efficient transfer of heat from the combustor to the boiler tubes while avoiding excessively high temperatures that will cause ash melting, and simultaneously remove sulphur from the combustor via sorbents such as limestone and dolomite. The present invention utilizes a coarse oxygen carrier bed material to distribute heat and oxygen throughout an Oxy-FBC, while injecting fine sulphur sorbent that will continuously be removed from the bed.

The invention relates to a method and to a device for chemical looping combustion CLC of a solid hydrocarbon feed wherein it is proposed to inject the solid hydrocarbon feed so as to limit any occurrence of sticking of the feed to the walls of the injection device. The solid feed is fed into a conveying zone operating under fluidized bed conditions and opening into a combustion reactor. A fluidization gas is injected into this conveying zone while controlling the flow of gas in such a way that the superficial velocity of the gas in the conveying zone is higher than the terminal velocity of the solid hydrocarbon feed particles and the terminal velocity of solid particles present in the combustion reactor, and while controlling the fluidization gas temperature in such a way that the temperature in the conveying zone is less than or equal to 500 C.

The invention relates to a method and to a device for chemical looping combustion CLC of a solid hydrocarbon feed wherein it is proposed to inject the solid hydrocarbon feed so as to limit any occurrence of sticking of the feed to the walls of the injection device. The solid feed is fed into a conveying zone operating under fluidized bed conditions and opening into a combustion reactor. A fluidization gas is injected into this conveying zone while controlling the flow of gas in such a way that the superficial velocity of the gas in the conveying zone is higher than the terminal velocity of the solid hydrocarbon feed particles and the terminal velocity of solid particles present in the combustion reactor, and while controlling the fluidization gas temperature in such a way that the temperature in the conveying zone is less than or equal to 500 C.

The present invention provides a method and system (1) for producing oxygen. Oxygen-carrier particles are transferred between a reduction process (10) and an oxidation process (15) connected to form a chemical looping process. The reduction process produces oxygen-depleted carrier particles and an exhaust gas mixture. Oxygen is separated from the exhaust gas mixture, preferably by a condenser (5). The oxygen-depleted carrier particles are returned to the oxidation process for regenerating the oxygen-depleted carrier particles with oxygen. The reduction process is performed during a first time period and the oxidation process is performed in a second time period.

The present invention provides a method and system (1) for producing oxygen. Oxygen-carrier particles are transferred between a reduction process (10) and an oxidation process (15) connected to form a chemical looping process. The reduction process produces oxygen-depleted carrier particles and an exhaust gas mixture. Oxygen is separated from the exhaust gas mixture, preferably by a condenser (5). The oxygen-depleted carrier particles are returned to the oxidation process for regenerating the oxygen-depleted carrier particles with oxygen. The reduction process is performed during a first time period and the oxidation process is performed in a second time period.

A system integrating heavy fuel coking and chemical looping combustion is provided. The system includes a source of heavy fuel, a cracking reactor into which the fuel and metal oxides are introduced, a fuel reactor in fluid communication with the cracking reactor, and an air reactor in fluid communication with the fuel reactor. In the cracking reactor, the fuel undergoes a cracking reaction forming products and petcoke deposits on the metal oxides. The fuel reactor is configured to gasify metal oxides with petcoke deposits to produce syngas and reduce the metal oxides. The system transports a first portion of the reduced metal oxides to the cracking reactor and a second portion to the fuel reactor. The air reactor is configured to receive reduced metal oxides from the fuel reactor and oxidize them. The system is further configured to transport the oxidized metal oxides to the fuel reactor.

A system integrating heavy fuel coking and chemical looping combustion is provided. The system includes a source of heavy fuel, a cracking reactor into which the fuel and metal oxides are introduced, a fuel reactor in fluid communication with the cracking reactor, and an air reactor in fluid communication with the fuel reactor. In the cracking reactor, the fuel undergoes a cracking reaction forming products and petcoke deposits on the metal oxides. The fuel reactor is configured to gasify metal oxides with petcoke deposits to produce syngas and reduce the metal oxides. The system transports a first portion of the reduced metal oxides to the cracking reactor and a second portion to the fuel reactor. The air reactor is configured to receive reduced metal oxides from the fuel reactor and oxidize them. The system is further configured to transport the oxidized metal oxides to the fuel reactor.

A method is disclosed for fluidizing a spent catalyst in a regenerator during a combustion process. The combustor includes a vessel and an air distributor. The air distributor includes an air grid and a plurality of first nozzles extending from the air grid. Spent catalyst is introduced into the vessel. Air is provided to the vessel via the plurality of first nozzles at a base combustion air rate. Additional air is provided to the vessels via a plurality of second nozzles of a fluffing air distributor at a fluffing air rate that is between 0.5 wt % and 10 wt % of the base combustion air rate to fluidize the catalyst. The second nozzles have outlets that are disposed below the air grid and above a bottom head of the vessel.

A method is disclosed for fluidizing a spent catalyst in a regenerator during a combustion process. The combustor includes a vessel and an air distributor. The air distributor includes an air grid and a plurality of first nozzles extending from the air grid. Spent catalyst is introduced into the vessel. Air is provided to the vessel via the plurality of first nozzles at a base combustion air rate. Additional air is provided to the vessels via a plurality of second nozzles of a fluffing air distributor at a fluffing air rate that is between 0.5 wt % and 10 wt % of the base combustion air rate to fluidize the catalyst. The second nozzles have outlets that are disposed below the air grid and above a bottom head of the vessel.