Applications of oxy-fuel combustion technology into gas turbine combustors and ion transport membrane reactors

Patent metadata

Field	Value
Publication number	US-2015267611-A1
Application number	US-201414178907-A
Country	US
Kind code	A1
Filing date	Feb 12, 2014
Priority date	Feb 12, 2014
Publication date	Sep 24, 2015
Grant date	—

Abstract

Experimental and numerical investigations on an atmospheric diffusion oxy-combustion flame in a gas turbine model combustor are conducted. The combustor is fuelled with CH 4 CH4 and a mixture of CO 2 and O 2 as oxidizer. The stability of the oxy-combustion flame is affected when the operating percentage of oxygen in the oxidizer mixture is reduced below 25%. A new 3D reactor design is introduced for the substitution of ITM reactors into a gas turbine combustor. A new oxygen permeation equation model has been developed by fitting the experimental data available in the literature for a LSCF ion transport membrane. The monolith structure design ITM reactor is capable of delivering power ranging from 5 to 8 MWe based on cycle first law efficiency.

First claim

1 . A monolith structure ion transport membrane reactor comprising:
a plurality of first ionic ceramic membranes that separate an oxygen gas from a feed sweep gas; a plurality of second ionic ceramic membranes; a reactor containing a plurality of channels formed by the first and second ionic ceramic membranes; an inlet; wherein the oxygen gas passes through the second ionic ceramic membrane to react with a fuel gas in a channel to create a flame; wherein the reactor has at least 50,000 permeate channels in which the oxygen gas and the fuel gas combust; and wherein the channels have a width of 1-15 mm.

2 . The reactor of claim 1 in which the total surface area of the ionic ceramic membrane is 2500 m 2 -3000 m 2 and the ionic ceramic membrane thickness is 0.5-1.0 mm.

3 . The reactor of claim 1 in which the reactor has a power output ranging from 5-8 MWe based on cycle first law efficiency.

4 . The reactor of claim 1 in which a methane concentration remains above about 5% at both the inlet of the reactor and in the permeate channels of the reactor.

5 . The reactor of claim 1 wherein both the separation of the oxygen gas from the feed sweep gas and the reaction of the oxygen gas with the fuel gas occurs inside the reactor.

6 . A swirl stabilized gas turbine oxy-combustor, comprising:
a mixing chamber having one or more inlets and one outlet in which oxygen is mixed with carbon dioxide; a supply pipe connected to the mixing chamber to pass a feed gas into an inlet of a combustion chamber; a bluff body having slits on one or more surfaces forming fuel channels wherein the inlet of the combustion chamber generates fuel flow velocity; and wherein the combustion chamber is downstream from the mixing chamber.

7 . The combustor of claim 6 wherein the mixing chamber has three or more inlets.

8 . A method for oxy-combustion of a non-swirling fuel using the combustor of claim 6 , comprising:
separating O 2 from the atmosphere through a plurality of air separation units to create an oxidizer mixture; introducing the feed gas through a plurality of channels configured to a round surface of the bluff body; supplying the oxidizer mixture to the combustion chamber through an annular space between the fuel inlet pipe and an outside diffuser; combusting the feed gas and the oxidizer mixture in the combustion chamber; and mixing the combustion products with a fresh gas in an outer recirculation zone.

9 . The method of claim 8 in which the operating percentage of oxygen in the oxidizer mixture is above 25%.

Assignees

• Univ King Fahd Pet & Minerals

Inventors

• Nemitallah Medhat Ahmed
• Habib Mohamed Abdel-Aziz

Classifications

• F23R3/286

  having fuel-air premixing devices (F23R3/30 takes precedence) · CPC title

• F23L7/007

  Supplying oxygen or oxygen-enriched air · CPC title

• F02C3/20 Primary

  using a special fuel, oxidant, or dilution fluid to generate the combustion products · CPC title

• Y02E20/32

  Direct CO2 mitigation · CPC title

• Y02E20/34

  Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery · CPC title