Provided is a process capable of converting the cokes on spent catalysts in a fluid catalytic cracking (FCC) process into synthesis gas. The produced synthesis gas contains high concentrations of CO and H.sub.2 and may be utilized in many downstream applications such as syngas fermentation for alcohol production, hydrogen production and synthesis of chemical intermediates. A reducer/regenerator reactor for a fluid catalytic process comprising a chemical looping system to produce synthesis gas is also described.

A looping reaction hydrogen production system includes a reduction reaction device, a primary separation device, a hydrogen production reaction device, a secondary separation device, a primary heat transfer device and a cooling purification device. Based on looping combustion reaction mechanism, the system makes MeO/Me circularly flow between the hydrogen production reaction device and the reduction reaction device to respectively generate a reduction/oxidation chemical reaction, and to convert the conventional carbon-based solid fuel into the high-purity clean hydrogen energy. Compared with the conventional hydrogen production technology from water-gas shift reaction of syngas, the system reduces water consumption, energy consumption and environmental pollution of the hydrogen production process; converts conventional carbon-based fuel into clean hydrogen energy by use of renewable energy sources, such as solar energy; and achieves efficient capture and storage of gaseous CO.sub.2.

A process and system for the generation gaseous fuels, the process comprising gasifying a carbonaceous fuel with vitiated air in the presence of lime and water to provide calcium carbonate, a gaseous fuel and heat; the system comprising a reactor for the gasification of the carbonaceous fuel with vitiated air in the presence of lime and water, and a heat exchanger to extract heat from the gaseous fuel. Use in the generation of gaseous fuels, in energy distribution and in grid energy firming.

Exemplary reactor systems may include multiple reactors in fluid communication. Oxygen carrier particles comprising a support material and metal oxide can be provided to a first reactor along with flue gas comprising carbon dioxide (CO2). An output of the first reactor is free or substantially free of carbon dioxide (CO2). The oxygen carrier particles can then be provided to one or more reactors in the system along with a hydrocarbon stream and, in some instances, an oxidizing stream. Outlets from these one or more reactors may include hydrogen gas (H2), carbon monoxide (CO), and/or other species, depending upon the content of the hydrocarbon streams and the oxidizing streams.

Provided is a process capable of converting the cokes on spent catalysts in a fluid catalytic cracking (FCC) process into synthesis gas. The produced synthesis gas contains high concentrations of CO and H.sub.2 and may be utilized in many downstream applications such as syngas fermentation for alcohol production, hydrogen production and synthesis of chemical intermediates. A reducer/regenerator reactor for a fluid catalytic process comprising a chemical looping system to produce synthesis gas is also described.

The disclosure provides a tri-metallic ferrite oxygen carrier for the chemical looping combustion of carbonaceous fuels. The tri-metallic ferrite oxygen carrier comprises Cu.sub.xFe.sub.yMn.sub.zO.sub.4-δ, where Cu.sub.xFe.sub.yMn.sub.zO.sub.4-δ is a chemical composition. Generally, 0.5≦x≦2.0, 0.2≦y≦2.5, and 0.2≦z≦2.5, and in some embodiments, 0.8≦x≦1.2, y≦1.2, and z≧0.8. The tri-metallic ferrite oxygen carrier may be used in various applications for the combustion of carbonaceous fuels, including as an oxygen carrier for chemical looping combustion.

A system and method for producing Syngas from the CO.sub.2 in a gaseous stream, such as an exhaust stream, from a power plant or industrial plant, like a cement kiln, is disclosed. A preferred embodiment includes providing the gaseous stream to pyrolysis reactor along with a carbon source such as coke. The CO.sub.2 and carbon are heated to about 1330° C. and at about one atmosphere with reactants such as steam such that a reaction takes place that produces Syngas, carbon dioxide (CO.sub.2) and hydrogen (H.sub.2). The Syngas is then cleaned and provided to a Fischer-Tropsch synthesis reactor to produce Ethanol or Bio-catalytic synthesis reactor.

A process for the production of syngas, comprising the steps of generating hydrogen and/or carbon monoxide from a hydrocarbon gas by contacting said hydrocarbon gas with a metal oxide in a first non-stoichiometric state MxOy-α such as to reduce said metal oxide in a first non-stoichiometric state MxOy-α towards a second non-stoichiometric state MxOy-β; generating hydrogen and/or carbon monoxide from a regenerating gas by contacting the metal oxide in the second non-stoichiometric state MxOy-β with said regenerating gas such as to oxidize the metal oxide in the second non-stoichiometric state MxOy-β towards the first non-stoichiometric state MxOy-α; characterized in that the β>α and α>0 and β<y.

An exemplary reactor system may include a first reactor, a second reactor, a third reactor, and a fourth reactor. The first reactor may be in parallel with the second reactor and the third reactor. The second reactor and third reactor may be in series. The fourth reactor may be configured to receive reduced oxygen carriers from the other reactors, generate oxidized oxygen carriers, and provide the oxidized oxygen carriers back to the other reactors. Carbonaceous feedstock may be used within one or more reactors.

The invention provides a process for producing hydrogen having the steps of reacting a fuel with a combination of two oxygen carriers to produce gaseous products and reduced oxygen carriers; reacting a portion of the reduced oxygen carriers with steam to generate hydrogen and partially oxidized oxygen carriers; and reacting the partially oxidized oxygen carriers and remaining reduced oxygen carriers with air to generate heat and regenerate the two oxygen carriers in their original oxidation state, wherein the heat and regenerated oxygen carriers are reused.