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US 8,196,387 B2Granted
Electrical power generation apparatus
AssigneePraxair Technology, Inc.
InventorsMinish Mahendra Shah, Aqil Jamal, Raymond Francis Dmevich, Bart Antonie van Hassel, Gervase Maxwell Christie, Hisashi Kobayashi, Lawrence E. Bool, III
Life of this patent
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Abstract
An apparatus for generating electrical power in which a synthesis gas stream generated in a gasifier is partially oxidized, expanded and thereafter, is combusted in an oxygen transport membrane system of a boiler. The combustion generates heat to raise steam to in turn generate electricity by a generator coupled to a steam turbine. The resultant flue gas can be purified to produce a carbon dioxide product.
Claims17
An apparatus for generating electrical power comprising:
- a gasifier for generating a synthesis gas stream;
- at least one partial oxidation stage configured to partially oxidize the synthesis gas stream and thereby oxidize a volatile content of the synthesis gas stream and to heat the synthesis gas stream, the at least one partial oxidation stage having an oxygen transport membrane reactor configured to generate oxygen to support the partial oxidation of the synthesis gas stream;
- at least one expansion stage having an expander for expanding the synthesis gas stream after having been heated in the at least one partial oxidation stage and a generator coupled to the expander for generating electrical power;
- an oxygen transport membrane boiler in flow communication with the at least one expansion stage and configured to generate:
- heat from combustion of the synthesis gas stream while at an elevated temperature;
- a flue gas containing carbon dioxide from the combustion of the synthesis gas stream;
- and steam through indirect heat transfer of the heat to boiler feed water;
- the oxygen transport membrane boiler having an oxygen transport membrane system operatively associated with a boiler, the oxygen transport membrane system configured to separate additional oxygen from an oxygen containing stream and support the combustion of the synthesis gas stream with the additional oxygen and the boiler configured to produce the steam by the indirect transfer of the heat to the boiler feed water;
- a steam cycle operatively associated with the oxygen transport membrane boiler and having a steam turbine system to extract energy from the steam;
- an additional electrical generator coupled to the steam turbine system to convert the energy to additional electrical power;
- and
- a purification system configured to purify the flue gas stream to produce a carbon dioxide-rich stream.
9 more elements
Dependencies are inferred from the claim text.