Attenuated combustion for clean power and hydrogen capture
Systems and systems to generate clean energy and for providing hydrogen capture and carbon capture sequestration are provided. Hydrogen from partial combustion of hydrocarbon fuel in combination with full combustion of carbon from hydrocarbon fuel is used to generate clean power with hydrogen capture and carbon capture sequestration.
1. A method for generating energy, the method comprising:
partially combusting a hydrocarbon fuel and providing a hot combustion gas stream, the combustion gas stream comprising hydrogen (H2), carbon dioxide (CO2) water and carbon monoxide (CO);
at least partially separating the water from the combustion gas stream and providing CO/CO2/H2 streams;
at least partially separating the hydrogen from the combustion gas stream to provide a CO/CO2 stream and a hydrogen stream;
at least partially separating the CO from the CO/CO2 stream and providing a CO stream;
completely combusting at least a portion of the CO stream and providing a source of CO2 working fluid; and
introducing said source of CO2 working fluid to at least one expander unit for receiving and expanding the source of CO2 working fluid; the at least one expander unit coupled to at least one turbine configured to generate energy.
2. The method of claim 1 wherein the method is partially closed loop or closed loop.
3. The method of claim 1 , further comprising at least partially capturing the hydrogen.
4. A system for generating energy, the system comprising:
in a partial combustor, partially combusting a hydrocarbon fuel and providing a combustion gas stream comprising an amount of hydrogen, an amount of carbon dioxide (CO2), and an amount of carbon monoxide (CO), an amount of water, therefrom;
a first separator to separate the amount of water from the combustion gas stream and the amount of hydrogen from the combustion gas stream and provide a CO/CO2 stream and a hydrogen stream;
a second separator configured to separate the amount of CO from the CO/CO2 stream and provide a CO stream;
in a oxy-combustor, completely combusting at least a portion of the CO stream and providing a carbon dioxide (CO2) working fluid; and
at least one expander unit for receiving and expanding the source of CO2; and
at least one turbine coupled to the at least one expander unit, the at least one turbine configured to generate energy.
5. The system of claim 4 , wherein the system is partially closed loop or closed loop.
6. The system of claim 4 , further comprising an air separating unit, wherein the air separating unit is coupled to one or both of the partial combustor and oxy-combustor.
7. The system of claim 4 , further comprising at least one carbon capture sequestration (CCS) unit coupled to the expander unit.