# US 8,539,776 B2 · Generating power using an ion transport membrane

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- Number: US 8,539,776 B2
- Document ID: US8539776B2
- Status: Granted
- Kind: B2
- Application number: 13/183,340
- Filed: 2011-07-14
- Published: 2012-02-09
- Granted: 2013-09-24
- Earliest claimed: 2010-07-14
- Assignees: GTLpetrol LLC
- Applicants: Rodney J. Allam
- Inventors: Rodney J. Allam
- Web page: https://patentgrep.com/patent/US8539776B2

## CPC

- F02C 7/22: Fuel supply systems
- C01B 13/0251: {by making use of membranes}
- F02C 3/28: using a separate gas producer for gasifying the fuel before combustion
- F02C 3/30: Adding water, steam or other fluids {for influencing combustion, e.g. to obtain cleaner exhaust gases (F02C7/141, F02C7/30, F01D21/00, F01K21/04, F23D11/10 take precedence)}
- F02C 6/06: providing compressed gas (F02C6/10 takes precedence)
- F02C 6/10: supplying working fluid to a user, e.g. a chemical process, which returns working fluid to a turbine of the plant
- F02C 6/18: using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants (using waste heat as source of energy for refrigeration plants F25B27/02; using the waste heat of a gasturbine for steam generation or in a steam cycle see F01K23/10)
- F02C 7/00: Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants (controlling F02C9/00)
- C01B 2203/84: Energy production
- F05D 2220/722: as part of an integrated gasification combined cycle
- F05D 2220/75: equipment using fuel having a low calorific value, e.g. low BTU fuel, waste end, syngas, biomass fuel or flare gas
- F05D 2260/213: by the provision of a heat exchanger within the cooling circuit
- F05D 2270/20: to optimize the performance of a machine
- Y02E 20/16: Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E 20/18: Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
- Y02E 50/10: Biofuels, e.g. bio-diesel
- F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00)
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A system may include a compressor, a heat exchanger and an ITM. The compressor is configured to receive an air stream and compress the air stream to generate a pressurized stream. The heat exchanger is configured to receive the pressured stream and indirectly heat the pressurized stream using heat from an oxygen stream from an Ion Transport Membrane (ITM). The ITM is configured to receive the heated pressurized stream and generate an oxygen stream and the non-permeate stream, wherein the non-permeate stream is passed to a gas turbine burner and the oxygen stream is passed to the heat exchanger.

## Claims

### Claim 1

A system, comprising:
a gas turbine including a turbine compressor, wherein the turbine compressor discharges an air stream in connection with compressing air used during combustion;
a separate air compressor configured to receive the air stream and compress the air stream to generate a pressurized stream;
a first heat exchanger configured to receive at least a first portion of the pressurized stream and indirectly heat the first portion using heat from an oxygen stream from an Ion Transport Membrane (ITM);
a second heat exchanger configured to receive at least a second portion of the pressurized stream and indirectly heat the second portion to an ITM inlet temperature using heat from a heated non-permeate stream from the ITM which has been further heated;
the ITM configured to receive a combination of the heated first portion and the heated second portion and generate the oxygen stream and the non-permeate stream, wherein the non-permeate stream is passed to a fuel gas burner and the oxygen stream is passed to the first heat exchanger;
the fuel gas burner configured to receive the non-permeate stream and combust a fuel gas in combination with the non-permeate stream to generate the heated non-permeate stream and pass the heated non-permeate stream to the second heat exchanger;
a conduit configured to receive a cooled non-permeate stream from the second heat exchanger and introduce the cooled non-permeate in a gas turbine burner; and
the gas turbine burner which combusts a fuel gas mixed with at least a portion of the cooled non-permeate stream in air, wherein a temperature of the combination of mixture of fuel gas and the cooled non-permeate stream is below a predefined threshold temperature for the gas turbine burner, and a concentration of oxygen in the cooled non-permeate stream is such that when mixed with a fuel gas results in an oxygen concentration below a lower flammable limit of the mixture.

### Claim 2 (depends on 1)

The system of claim 1, wherein 40% and 60% of the combination is received from an air compressor which is separate from the gas turbine.

### Claim 3 (depends on 1)

The system of claim 1, wherein the heated non-permeate stream has a temperature about 800° C. or higher.

### Claim 4 (depends on 1)

The system of claim 1, wherein the concentration of oxygen of the cooled non-permeate stream is about below 2.5% or less molar concentration.

### Claim 5 (depends on 1)

The system of claim 1, wherein the combination has a temperature range from about 800° C. to about 900° C.

### Claim 6 (depends on 1)

The system of claim 1, wherein the air stream discharged from the gas turbine compressor as part of the air feed for the ITM is compressed in a pressure range from about 2 bars to 10 bars.