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US 6,745,573 B2Granted
Integrated air separation and power generation process
AssigneeAmerican Air Liquide, Inc.
InventorsOvidiu Marin, Jean-Pierre Maricourt, Olivier Charon, Pietro DiZanno
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Abstract
An integrated air separation and power generation process produces an O2-enriched gas stream and an N2-enriched gas stream in an air separation unit. The O2-enriched gas stream is introduced with fuel and steam to a combustor, producing flue gas. At least a portion of the flue gas and steam stream exiting the combustor is used to generate power. The N2-enriched gas stream is heated and power is generated from the heated N2-enriched gas stream.
Claims30
An integrated air separation and power generation process, comprising the steps of:
- (a) introducing an O2/N2 source to an air separation unit;
- (b) separating the O2/N2 source into at least an O2-enriched gaseous stream and an N2-enriched gaseous stream;
- (c) introducing at least a portion of the O2-enriched gaseous stream, having a pressure of at least about 3 bars (300 kPa), and fuel to a combustor to produce a combustion mixture;
- (d) burning the combustion mixture to produce at least a flue gas;
- (e) injecting steam into the combustor during the combustion mixture burning step, to produce a modified combustion mixture of at flue gas and steam (resulting in a FG/S stream);
- (f) generating power by introducing the modified combustion mixture exiting the combustor into a first power generating means;
- (g) heating at least a portion of the N2-enriched gaseous stream, having a pressure of at least 3 bars (300 kPa);
- (h) generating power by introducing the heated N2-enriched gaseous stream into a second power generating means;
- and
- wherein the injected steam is in a range of about 70 mol. % to about 99 mol. % of the total of the O2-enriched gaseous stream, fuel, and steam in the combustor.
7 more elements
Dependencies are inferred from the claim text.