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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

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Wang, Y, McIlveen-Wright, D, Huang, Y, Hewitt, NJ, Eames, PC, Rezvani, S, McMullan, JT and Roskilly, AP (2007) The application of FLOX/COSTAIR technologies to reduce NOx emissions from coal/biomass fired power plant: a technical assessment based on computational simulation. Fuel, 86 (14). pp. 2101-2108. [Journal article]

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URL: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V3B-4N14BR3-1&_user=735339&_coverDate=09%2F30%2F2007&_alid=1680225913&_rdoc=9&_fmt=high&_orig=search&_origin=search&_zone=rslt_list_item&_cdi=5726&_sort=d&_st=13&_docanchor=&view=c&_ct=18&_acct=C0

DOI: doi:10.1016/j.fuel.2007.01.013

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.

Item Type:Journal article
Faculties and Schools:Faculty of Art, Design and the Built Environment
Faculty of Art, Design and the Built Environment > School of the Built Environment
Research Institutes and Groups:Built Environment Research Institute
Built Environment Research Institute > Centre for Sustainable Technologies (CST)
ID Code:10641
Deposited By:Dr David McIlveen-Wright
Deposited On:21 Mar 2011 11:41
Last Modified:21 Mar 2011 11:41

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