Oxygen transport membrane based advanced power cycle with low pressure synthesis gas slip stream

摘要

A method and system for generating electrical power in which a high pressure synthesis gas stream generated in a gasifier is partially oxidized in an oxygen transport membrane based reactor, expanded and thereafter, is combusted in an oxygen transport membrane based boiler. A low pressure synthesis gas slip stream is split off downstream of the expanders and used as the source of fuel in the oxygen transport membrane based partial oxidation reactors to allow the oxygen transport membrane to operate at low fuel pressures with high fuel utilization. The combustion within the boiler 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.

主权项

1. A method of generating electrical power comprising the steps of:
generating a synthesis gas stream in a gasifier; heating the synthesis gas stream via indirect heat exchange with radiant heat generated from at least one oxygen transport membrane based partial oxidation reactor; expanding the heated synthesis gas stream in at least one expansion stage; diverting a portion of the expanded synthesis gas stream to the at least one oxygen transport membrane based partial oxidation reactor where such diverted portion of the synthesis gas stream is partially oxidized with permeated oxygen from the oxygen transport membrane based partial oxidation reactor to produce a reaction product stream and the radiant heat; feeding another portion of the expanded synthesis gas stream and the reaction product stream to an oxygen transport membrane based boiler where the synthesis gas stream and reaction product stream react with permeated oxygen and a source of supplemental oxygen to produce steam from a source of boiler feed water and to produce a carbon dioxide containing flue gas stream; extracting energy from the steam by a steam turbine subsystem operatively associated with the oxygen transport membrane based boiler and converting the extracted energy to electrical power; and purifying the carbon dioxide containing flue gas stream to produce a carbon dioxide-rich stream.