Keywords
Coal, Fly Ash, Char, Soot
Abstract
The unburned carbon in the fly ash produced by low-NOx pulverized coal combustion has been shown by electron microscopy to be a mixture of porous coal char particles and aggregates of submicron particles, which are thought to be soot. The carbon is bimodally distributed with large soot aggregates mixed with the char in the particles larger than 10 microns and dispersed soot found with the submicron particles. A method for determining the mass of soot and char by liquid-suspension gravity separation was used with both laboratory-scale and power plant fly ash samples. For low-NOx, staged, pilot-scale combustion of bituminous coal the soot in the furnace exit ash was estimated to be 0.2–0.6% of the fuel carbon, which was about 35% of the total unburned carbon.
Original Publication Citation
Veranth, J. M., T. H. Fletcher, D. W. Pershing, and A. F. Sarofim, "Measurement of Soot and Char in Pulverized Coal Fly Ash," Fuel, 79(9), 1067-1075 (2000).
BYU ScholarsArchive Citation
Veranth, John M.; Fletcher, Thomas H.; Pershing, David W.; and Sarofim, Adel F., "Measurement of Soot and Char in Pulverized Coal Fly Ash" (2000). Faculty Publications. 7050.
https://scholarsarchive.byu.edu/facpub/7050
Document Type
Peer-Reviewed Article
Publication Date
2000
Publisher
Elsevier
Language
English
College
Ira A. Fulton College of Engineering
Department
Chemical Engineering
Copyright Status
2000 Elsevier Science Ltd. All rights reserved.
Copyright Use Information
https://lib.byu.edu/about/copyright/