Oxygen transport membrane reactor based method and system for generating electric power
First Claim
1. An oxygen transport membrane based power generation system comprising:
- an oxygen transport membrane based combined reforming subsystem configured to produce a hydrogen-rich, high pressure synthesis gas stream from a hydrocarbon containing feed stream and steam; and
an oxygen transport membrane based power cycle subsystem comprising an oxygen transport membrane based boiler reactor configured to produce steam, electric power, and a carbon dioxide containing effluent by combusting the hydrogen-rich, high pressure synthesis gas stream at a pressure at least two times that of ambient pressure in the oxygen transport membrane based boiler reactor, wherein said system additionally comprises;
a first expansion stage for the generation of electric power, wherein said first expansion stage is configured to expand the hydrogen-rich, high pressure synthesis gas stream to an intermediate pressure prior to introducing said intermediate pressure, hydrogen-rich synthesis gas into the oxygen transport membrane based boiler reactor to combust said intermediate pressure, hydrogen-rich synthesis gas to generate or heat steam from a boiler feed stream passing through thermally coupled adjacent steam tubes within the oxygen transport membrane based boiler reactor, anda second expansion stage for the generation of electric power, wherein said second expansion stage comprises a gas turbo expander configured to expand the carbon dioxide containing effluent exiting the oxygen transport membrane based boiler reactor.
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Abstract
A carbon capture enabled system and method for generating electric power and/or fuel from methane containing sources using oxygen transport membranes by first converting the methane containing feed gas into a high pressure synthesis gas. Then, in one configuration the synthesis gas is combusted in oxy-combustion mode in oxygen transport membranes based boiler reactor operating at a pressure at least twice that of ambient pressure and the heat generated heats steam in thermally coupled steam generation tubes within the boiler reactor; the steam is expanded in steam turbine to generate power; and the carbon dioxide rich effluent leaving the boiler reactor is processed to isolate carbon. In another configuration the synthesis gas is further treated in a gas conditioning system configured for carbon capture in a pre-combustion mode using water gas shift reactors and acid gas removal units to produce hydrogen or hydrogen-rich fuel gas that fuels an integrated gas turbine and steam turbine system to generate power. The disclosed method and system can also be adapted to integrate with coal gasification systems to produce power from both coal and methane containing sources with greater than 90% carbon isolation.
265 Citations
19 Claims
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1. An oxygen transport membrane based power generation system comprising:
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an oxygen transport membrane based combined reforming subsystem configured to produce a hydrogen-rich, high pressure synthesis gas stream from a hydrocarbon containing feed stream and steam; and an oxygen transport membrane based power cycle subsystem comprising an oxygen transport membrane based boiler reactor configured to produce steam, electric power, and a carbon dioxide containing effluent by combusting the hydrogen-rich, high pressure synthesis gas stream at a pressure at least two times that of ambient pressure in the oxygen transport membrane based boiler reactor, wherein said system additionally comprises; a first expansion stage for the generation of electric power, wherein said first expansion stage is configured to expand the hydrogen-rich, high pressure synthesis gas stream to an intermediate pressure prior to introducing said intermediate pressure, hydrogen-rich synthesis gas into the oxygen transport membrane based boiler reactor to combust said intermediate pressure, hydrogen-rich synthesis gas to generate or heat steam from a boiler feed stream passing through thermally coupled adjacent steam tubes within the oxygen transport membrane based boiler reactor, and a second expansion stage for the generation of electric power, wherein said second expansion stage comprises a gas turbo expander configured to expand the carbon dioxide containing effluent exiting the oxygen transport membrane based boiler reactor. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A hybrid oxygen transport membrane based power generation system comprising:
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a coal gasification subsystem configured to produce a coal-derived, high pressure synthesis gas stream from a source of coal, steam and oxygen produced from cryogenic distillation of air; an oxygen transport membrane based reforming subsystem configured to produce a reformed hydrogen-rich, high pressure synthesis gas stream from a hydrocarbon containing feed stream and steam; an oxygen transport membrane based power cycle subsystem comprising an oxygen transport membrane based boiler reactor configured to produce steam, electric power, and a carbon dioxide containing effluent by combusting a first synthesis gas feed stream at a pressure at least two times that of ambient pressure in the oxygen transport membrane based boiler reactor, wherein said system additionally comprises; a first expansion stage for the generation of electric power, wherein said first expansion stage is configured to expand the hydrogen-rich, high pressure synthesis gas stream to an intermediate pressure prior to introducing said intermediate pressure, hydrogen-rich synthesis gas into the oxygen transport membrane based boiler reactor to combust said intermediate pressure, hydrogen-rich synthesis gas to generate or heat steam from a boiler feed stream passing through thermally coupled adjacent steam tubes within the oxygen transport membrane based boiler reactor, and a second expansion stage for the generation of electric power, wherein said second expansion stage comprises a gas turbo expander configured to expand the carbon dioxide containing effluent exiting the oxygen transport membrane based boiler reactor; wherein said first synthesis gas feed stream comprises the coal-derived, high pressure synthesis gas stream, or the reformed hydrogen-rich high pressure synthesis gas stream or a combination of both the coal-derived, high pressure synthesis gas stream and the reformed hydrogen-rich high pressure synthesis gas stream. - View Dependent Claims (8)
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9. A carbon capture enabled oxygen transport membrane based power generation system comprising:
an oxygen transport membrane based synthesis gas subsystem configured to treat a methane containing feed stream to form a hydrogen-rich effluent stream wherein the oxygen transport membrane based synthesis gas subsystem further comprises an oxygen transport membrane reforming reactor configured to react the methane containing feed stream with oxygen provided across the membrane from an oxygen containing feed stream and steam to form the hydrogen-rich effluent stream; a gas conditioning subsystem configured to treat the hydrogen-rich effluent stream to produce a hydrogen or a hydrogen-rich fuel gas and a carbon dioxide rich effluent stream; and an integrated power generation subsystem comprising an air-blown gas turbine configured to be fueled by the hydrogen-rich fuel gas to generate electricity and a gas turbine exhaust stream at elevated temperature;
a heat recovery steam generator configured to raise steam by recovering heat from the gas turbine exhaust stream; and
a steam turbine configured to generate electricity utilizing steam generated in the heat recovery steam generator.- View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
Specification