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Approaches for Clean Combustion in Gas TurbinesHybrid Membrane and Porous-Plates Reactors for Gas Turbine Applications

Approaches for Clean Combustion in Gas Turbines: Hybrid Membrane and Porous-Plates Reactors for... [Because of the high efficiency penalty associated with using cryogenic oxygen separation units in oxy-combustion systems, researchers were striving to find alternative solutions. One of these solutions is the use of ion transport membranes (ITMs) for oxygen production. These ITMs have the capability of extracting oxygen from air at elevated temperatures (above 650 °C). The permeation of oxygen through the ion transport membranes depends on the membrane type, thickness, operating temperature and the partial pressure of oxygen across the membrane. The integration of these membranes in oxy-combustion reactors led to the design of oxygen transport reactors (OTRs) where oxygen-air separation occurs at one side while the fuel burning occurs at the other side of the membrane. The idea is to replace the currently used conventional combustors by multi-membrane reactor system. However, such membrane reactors are suffering from low oxygen permeation and deterioration of membrane performance after a short period of time due to contamination caused by combustion products. Currently, research is focused on improving the membrane performance and chemical stability under more demanding operational conditions. In this regard, dense mixed-ionic-electronic conducting ceramic (MIEC) membrane has shown a good potential for use in oxy-fuel technology. One main challenge in designing an OTR to be used in power plants is the low oxygen flux that makes the required membrane surface area to be very large. Accordingly, improving oxygen permeation in ITMs is a necessary step towards the efficient design of OTRs. Another kind of membranes is the polymeric kind, which can separate gases under low temperatures. In polymeric membrane gas separation, there is no need for thermal heating of the membrane or the involvement of any sorbents to separate a gas mixture, as in the cases of cryogenic distillation and adsorption. The main driving force in polymeric membrane air separation is the partial pressure gradient across the membrane.] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Approaches for Clean Combustion in Gas TurbinesHybrid Membrane and Porous-Plates Reactors for Gas Turbine Applications

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Publisher
Springer International Publishing
Copyright
© Springer Nature Switzerland AG 2020
ISBN
978-3-030-44076-3
Pages
321 –417
DOI
10.1007/978-3-030-44077-0_6
Publisher site
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Abstract

[Because of the high efficiency penalty associated with using cryogenic oxygen separation units in oxy-combustion systems, researchers were striving to find alternative solutions. One of these solutions is the use of ion transport membranes (ITMs) for oxygen production. These ITMs have the capability of extracting oxygen from air at elevated temperatures (above 650 °C). The permeation of oxygen through the ion transport membranes depends on the membrane type, thickness, operating temperature and the partial pressure of oxygen across the membrane. The integration of these membranes in oxy-combustion reactors led to the design of oxygen transport reactors (OTRs) where oxygen-air separation occurs at one side while the fuel burning occurs at the other side of the membrane. The idea is to replace the currently used conventional combustors by multi-membrane reactor system. However, such membrane reactors are suffering from low oxygen permeation and deterioration of membrane performance after a short period of time due to contamination caused by combustion products. Currently, research is focused on improving the membrane performance and chemical stability under more demanding operational conditions. In this regard, dense mixed-ionic-electronic conducting ceramic (MIEC) membrane has shown a good potential for use in oxy-fuel technology. One main challenge in designing an OTR to be used in power plants is the low oxygen flux that makes the required membrane surface area to be very large. Accordingly, improving oxygen permeation in ITMs is a necessary step towards the efficient design of OTRs. Another kind of membranes is the polymeric kind, which can separate gases under low temperatures. In polymeric membrane gas separation, there is no need for thermal heating of the membrane or the involvement of any sorbents to separate a gas mixture, as in the cases of cryogenic distillation and adsorption. The main driving force in polymeric membrane air separation is the partial pressure gradient across the membrane.]

Published: Mar 25, 2020

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