The application of FLOX/COSTAIR technologies to reduce NOx emissions from coal/biomass fired power plant: a technical assessment based on computational simulation

Y Wang, D McIlveen-Wright, Y Huang, NJ Hewitt, PC Eames, S Rezvani, JT McMullan, AP Roskilly

Research output: Contribution to journalArticle

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Abstract

Nitrogen oxides (NOx) is one of the harmful emissions from power plants. Efforts are made to reduce NOx emissions by researchers and engineers all the times. NOx emissions are from three resources during the combustion: prompt NO, fuel NO and thermal NO. The last one – thermal NO, which is described by ‘Zeldovich-mechanism’, is the main source for NOx emissions. The thermal NO emission mainly results from the high combustion temperature in the combustion process. In order to control the NO formation, the control of peak combustion temperature is the key factor, as well as the oxygen concentration in the combustion areas. Flameless oxidation (FLOX) and continuous staged air combustion (COSTAIR) are two relatively new technologies to control the combustion temperature and the reaction rate and consequently to control the NOx emissions.In this study both FLOX and COSTAIR technologies are assessed based on a 12 MWe, coal-fired, circulating fluidised bed combustion (CFBC) power plant by using ECLIPSE simulation software, together with a circulating fluidised bed gasification (CFBG) plus normal burner plant. Two different fuels – coal and biomass (straw) are used for the simulation. The technical results from the study show that the application of FLOX technology to the plant may reduce NOx emissions by 90% and the application of COSTAIR technology can reduce NOx emissions by 80–85% from the power plant. The emissions from the straw-fuelled plants are all lower than that of coal-fuelled ones although with less plant efficiencies.
LanguageEnglish
Pages2101-2108
JournalFuel
Volume86
Issue number14
DOIs
Publication statusPublished - Sep 2007

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Nitrogen Oxides
Coal
Nitrogen oxides
Power plants
Biomass
Oxidation
Air
Straw
Fuel burners
Gasification
Temperature
Reaction rates

Cite this

Wang, Y ; McIlveen-Wright, D ; Huang, Y ; Hewitt, NJ ; Eames, PC ; Rezvani, S ; McMullan, JT ; Roskilly, AP. / The application of FLOX/COSTAIR technologies to reduce NOx emissions from coal/biomass fired power plant: a technical assessment based on computational simulation. In: Fuel. 2007 ; Vol. 86, No. 14. pp. 2101-2108.
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abstract = "Nitrogen oxides (NOx) is one of the harmful emissions from power plants. Efforts are made to reduce NOx emissions by researchers and engineers all the times. NOx emissions are from three resources during the combustion: prompt NO, fuel NO and thermal NO. The last one – thermal NO, which is described by ‘Zeldovich-mechanism’, is the main source for NOx emissions. The thermal NO emission mainly results from the high combustion temperature in the combustion process. In order to control the NO formation, the control of peak combustion temperature is the key factor, as well as the oxygen concentration in the combustion areas. Flameless oxidation (FLOX) and continuous staged air combustion (COSTAIR) are two relatively new technologies to control the combustion temperature and the reaction rate and consequently to control the NOx emissions.In this study both FLOX and COSTAIR technologies are assessed based on a 12 MWe, coal-fired, circulating fluidised bed combustion (CFBC) power plant by using ECLIPSE simulation software, together with a circulating fluidised bed gasification (CFBG) plus normal burner plant. Two different fuels – coal and biomass (straw) are used for the simulation. The technical results from the study show that the application of FLOX technology to the plant may reduce NOx emissions by 90{\%} and the application of COSTAIR technology can reduce NOx emissions by 80–85{\%} from the power plant. The emissions from the straw-fuelled plants are all lower than that of coal-fuelled ones although with less plant efficiencies.",
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The application of FLOX/COSTAIR technologies to reduce NOx emissions from coal/biomass fired power plant: a technical assessment based on computational simulation. / Wang, Y; McIlveen-Wright, D; Huang, Y; Hewitt, NJ; Eames, PC; Rezvani, S; McMullan, JT; Roskilly, AP.

In: Fuel, Vol. 86, No. 14, 09.2007, p. 2101-2108.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The application of FLOX/COSTAIR technologies to reduce NOx emissions from coal/biomass fired power plant: a technical assessment based on computational simulation

AU - Wang, Y

AU - McIlveen-Wright, D

AU - Huang, Y

AU - Hewitt, NJ

AU - Eames, PC

AU - Rezvani, S

AU - McMullan, JT

AU - Roskilly, AP

PY - 2007/9

Y1 - 2007/9

N2 - Nitrogen oxides (NOx) is one of the harmful emissions from power plants. Efforts are made to reduce NOx emissions by researchers and engineers all the times. NOx emissions are from three resources during the combustion: prompt NO, fuel NO and thermal NO. The last one – thermal NO, which is described by ‘Zeldovich-mechanism’, is the main source for NOx emissions. The thermal NO emission mainly results from the high combustion temperature in the combustion process. In order to control the NO formation, the control of peak combustion temperature is the key factor, as well as the oxygen concentration in the combustion areas. Flameless oxidation (FLOX) and continuous staged air combustion (COSTAIR) are two relatively new technologies to control the combustion temperature and the reaction rate and consequently to control the NOx emissions.In this study both FLOX and COSTAIR technologies are assessed based on a 12 MWe, coal-fired, circulating fluidised bed combustion (CFBC) power plant by using ECLIPSE simulation software, together with a circulating fluidised bed gasification (CFBG) plus normal burner plant. Two different fuels – coal and biomass (straw) are used for the simulation. The technical results from the study show that the application of FLOX technology to the plant may reduce NOx emissions by 90% and the application of COSTAIR technology can reduce NOx emissions by 80–85% from the power plant. The emissions from the straw-fuelled plants are all lower than that of coal-fuelled ones although with less plant efficiencies.

AB - Nitrogen oxides (NOx) is one of the harmful emissions from power plants. Efforts are made to reduce NOx emissions by researchers and engineers all the times. NOx emissions are from three resources during the combustion: prompt NO, fuel NO and thermal NO. The last one – thermal NO, which is described by ‘Zeldovich-mechanism’, is the main source for NOx emissions. The thermal NO emission mainly results from the high combustion temperature in the combustion process. In order to control the NO formation, the control of peak combustion temperature is the key factor, as well as the oxygen concentration in the combustion areas. Flameless oxidation (FLOX) and continuous staged air combustion (COSTAIR) are two relatively new technologies to control the combustion temperature and the reaction rate and consequently to control the NOx emissions.In this study both FLOX and COSTAIR technologies are assessed based on a 12 MWe, coal-fired, circulating fluidised bed combustion (CFBC) power plant by using ECLIPSE simulation software, together with a circulating fluidised bed gasification (CFBG) plus normal burner plant. Two different fuels – coal and biomass (straw) are used for the simulation. The technical results from the study show that the application of FLOX technology to the plant may reduce NOx emissions by 90% and the application of COSTAIR technology can reduce NOx emissions by 80–85% from the power plant. The emissions from the straw-fuelled plants are all lower than that of coal-fuelled ones although with less plant efficiencies.

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JF - Fuel

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ER -