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US 2008/0176174 A1Published application
Purification of carbon dioxide
AssigneeAir Products and Chemicals, Inc.
InventorsVincent White, Rodney John Allam
Life of this patent
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Abstract
Carbon dioxide is separated from a feed gas, preferably derived from flue gas from an oxyfuel combustion process, in a membrane separation system to produce separated carbon dioxide gas which is fed to the oxyfuel combustion process to improve the performance of the process.
Claims25
A method for oxyfuel combustion of a fuel selected from the group consisting of carbonaceous fuel;
- hydrocarbonaceous fuel;
- and mixtures thereof, said method comprising:
- combusting said fuel in the presence of oxygen in an oxyfuel combustion unit to produce flue gas comprising carbon dioxide;
- separating carbon dioxide from feed gas comprising carbon dioxide by diffusion across at least one permeable membrane in a membrane separation system to produce separated carbon dioxide gas and vent gas;
- and
- feeding at least a portion of said separated carbon dioxide gas from said membrane separation system to said oxyfuel combustion unit.
3 more elements
Dependencies are inferred from the claim text.