Record Display for the EPA National Library Catalog


Main Title Combustion research on the fate of fuel-nitrogen under conditions of pulverized coal combustion /
Author Levy, J. M. ; Pohl, J. H. ; Sarofim, A. F. ; Song, Y. H. ;
Other Authors
Author Title of a Work
Levy, J. M.
CORP Author United States. Environmental Protection Agency. Office of Research and Development.
Publisher Environmental Protection Agency, Office of Research and Development ; For sale by the National Technical Information Service,
Year Published 1978
Report Number EPA-600/7-78-165; EPA-R-803242
Stock Number 22161
OCLC Number 04702189
ISBN pbk.
Subjects Coal, Pulverized ; Combustion ; Nitrogen compounds
Additional Subjects Air pollution ; Nitrogen oxides ; Coal ; Combustion ; Combustion products ; Nitrogen ; Pyrolysis ; Industrial wastes ; Design criteria ; Performance evaluation ; Oxidation ; Equipment ; Gas analysis ; Chemical analysis ; Volatility ; Chemical reaction mechanisms ; Coal combustion
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EKBD  EPA-600/7-78-165 Research Triangle Park Library/RTP, NC 12/12/2003
ELBD ARCHIVE EPA 600-7-78-165 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
NTIS  PB-286 208 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation x, 176 pages : illustrations ; 28 cm.
The report gives results of an experimental investigation of coal pyrolysis and oxidation, and char oxidation to determine the effects of temperature and fuel/oxygen equivalence ratio on the conversion of coal-nitrogen to NOx. Experiments involved a laboratory laminar flow furnace under conditions representing pulverized coal combustors; i.e., heating rates of 1000 to 1 million K/sec, temperatures of 1000 to 2100 K, and residence times of 2 to 1000 milliseconds. The devolatilization experiments showed that no nitrogen loss occurred until 10 to 15% of the coal had been devolatilized, consistent with the hypothesis that coal-nitrogen is contained mostly in heterocyclic rings. Nitrogen was completely removed from the char by prolonged heating at above 1750 K, implying that nitrogen does not form condensed stable structures at pulverized flame temperatures, as does carbon. After initial fracture, loss of nitrogen and total weight loss are linearly correlated with a nitrogen-to-carbon slope of 1.25 to 1.5. Volatile nitrogen compounds accounted for the major fraction of NOx produced from coal-nitrogen, especially at high temperatures and low fuel/oxygen equivalence ratios. The results suggest that low NOx emissions from pulverized coal combustion are favored by a two-stage design: the first stage operated fuel-rich at high temperature; the second, fuel-lean at low temperature.
Grant no. R803242, task no. 2, program element no. EHE624A. Issued Aug. 1978. Includes bibliographical references (pages 172-176).