Oxygen transport membrane reactor based method and system for generating electric power

摘要

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.

主权项

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.