Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Conditioning of fly ash with sulfur trioxide and ammonia.
Author Dismukes, Edward B.
Other Authors
Author Title of a Work
Dismukes, Edward B.
CORP Author Southern Research Inst., Birmingham, Ala.;Environmental Protection Agency, Washington, D.C. Office of Research and Development.;Tennessee Valley Authority, Chattanooga. Power Research Staff.
Publisher NTIS,
Year Published 1975
Report Number EPA/600/2-75/015; SORI-EAS-75-311; 2932-3-F; EPA-68-02-1303; CPA-70-149; EPA-ROAP-21ADJ; TVA-F75-PRS-5
Stock Number PB-247 231
OCLC Number 17960040
Subjects Fly ash. ; Air--Pollution. ; Electrostatic precipitation.
Additional Subjects Air pollution control ; Electrostatic precipitation ; Fly ash ; Electric power plants ; Flue gases ; Additives ; Combustion products ; Coal ; Sulfur trioxide ; Ammonia ; Ash content ; Chemical analysis ; Chemical properties ; Electrical resistivity ; Particles ; Particle size ; Cost estimates ; Particulates
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 600-2-75-015 Headquarters Library/Washington,DC 09/07/2011
EJBD  EPA 600-2-75-015 c.1 Headquarters Library/Washington,DC 02/28/2013
EKBD  EPA-600/2-75-015 Research Triangle Park Library/RTP, NC 05/23/1997
ESAD  EPA 600-2-75-015 Region 10 Library/Seattle,WA 08/28/2018 DISPERSAL
NTIS  PB-247 231 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation 154 pages
The report summarizes research on the conditioning of fly ash in coal-burning electric power stations with two flue-gas additives--sulfur trioxide and ammonia. It presents experimental data on the use of these additives to improve the efficiency of electrostatic precipitation of fly ash by adjusting the electrical resistivity of the ash and by other less widely recognized mechanisms. The report shows that the primary role of sulfur trioxide is lowering resistivity from the excessive values found with ash from low-sulfur coals. It also indicates that the role of ammonia does not involve a change in resistivity, despite findings to the contrary by other investigators. At least for the specific circumstances investigated, the research data indicate that conditioning by ammonia involves a space-charge enhancement of the electric field in the interelectrode space of a precipitator and, sometimes additionally, an increase in the cohesiveness of the collected ash. The report addresses both the theoretical aspects of conditioning mechanisms, and such practical matters as the effectiveness of each agent as a function of the concentration added, the facilities used for adding the agent, the chemical composition of the ash treated, and the temperature of the ash during conditioning and precipitation.
PB 247 231.