Predicting Hg emissions rates from utility gas cleaning systems

This study validates the Hg emissions rates from NEA’s MercuRator™ with field test data for 25 full-scale utility gas cleaning systems that emphasize SCR/ESP/FGD combinations and activated carbon injection (ACI). Validations of the extents of Hg 0 oxidation across SCRs and of Hg retention in wet FGD...

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Bibliographic Details
Published in:Fuel (Guildford) 2010-04, Vol.89 (4), p.859-867
Main Authors: Naik, Chitralkumar V., Krishnakumar, Balaji, Niksa, Stephen
Format: Article
Language:English
Subjects:
Air pollution caused by fuel industries
Applied sciences
Emissions prediction
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Installations for energy generation and conversion: thermal and electrical energy
Mercury emissions
Mercury speciation
Pollution reduction
Reaction mechanisms
Stack gas and industrial effluent processing
Thermal power plants
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Summary:This study validates the Hg emissions rates from NEA’s MercuRator™ with field test data for 25 full-scale utility gas cleaning systems that emphasize SCR/ESP/FGD combinations and activated carbon injection (ACI). Validations of the extents of Hg 0 oxidation across SCRs and of Hg retention in wet FGDs gave correlation coefficients greater than 0.9 for both units. The validations for ACI applications yielded the first quantitative interpretations for different saturation levels of Hg capture for the highest ACI rates. When all the reaction mechanisms were combined to simulate Hg transformations along complete gas cleaning systems, the predicted Hg emissions rates were correctly rank ordered for nine of ten stations with SCR/CESP/FGD combinations, and for all six ACI test sites.
ISSN:0016-2361
1873-7153
DOI:10.1016/j.fuel.2009.02.004