Process for enriched combustion using solid electrolyte ionic conductor systems
AssigneePraxair Technology, Inc.
InventorHisashi Kobayashi
Life of this patent
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Abstract
A combustion or partial oxidation process for using an oxidant with a low nitrogen concentration. An oxygen-containing gas is introduced into an ion transport module including an ion transport membrane having a retentate side with a first pressure and a permeate side with a second pressure to separate a purified oxygen gas stream on the permeate side and correspondingly depleting the oxygen on the retentate side to produce the oxygen-depleted gas stream. A purge gas stream containing a low concentration of nitrogen is passed to the permeate side to form an oxidant stream containing less than about 40% oxygen. The oxidant stream and a fuel are then introduced into a combustion or reaction chamber to produce heat and products of combustion or partial oxidation.
Claims19
A combustion process using an oxidant with a low nitrogen concentration comprising:
- (a) introducing an oxygen-containing gas to an ion transport module including an ion transport membrane having a retentate side with a first pressure and a permeate side with a second pressure forming a permeate chamber to separate a purified oxygen gas stream on the permeate side and correspondingly depleting the oxygen on the retentate side to produce an oxygen-depleted gas stream;
- (b) passing a purge gas stream containing a low concentration of nitrogen to the permeate side to form an oxidant stream containing less than about 40% oxygen;
- and
- (c) introducing said oxidant stream and a fuel into a combustion chamber to produce heat and products of combustion.
A combustion process using an oxidant with a low nitrogen concentration comprising:
- (a) introducing an oxygen-containing gas to an ion transport module including a first and second ion transport membranes, said first ion transport membrane having a first retentate side with a first retentate pressure and a first permeate side with a first permeate pressure forming a first permeate chamber to separate a first purified oxygen gas stream on the first permeate side and correspondingly depleting the oxygen on the first retentate side to produce a first oxygen-depleted gas stream;
- (b) introducing said first oxygen-depleted gas stream to said second ion transport membrane having a second retentate side with a second retentate pressure and a second permeate side with a second permeate pressure forming a second permeate chamber to separate a second purified oxygen gas stream on the second permeate side and correspondingly depleting the oxygen on the second retentate side to produce a second oxygen-depleted gas stream;
- (c) passing a first purge gas stream containing a low concentration of nitrogen to said first permeate side to form an oxidant stream containing less than about 40% oxygen;
- (d) passing a second purge gas stream containing a fuel and a low concentration of nitrogen to said second permeate side to form a syngas stream;
- and
- (e) introducing said oxidant stream, said syngas stream into a combustion chamber to produce heat and products of combustion.
Dependencies are inferred from the claim text.