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Flash Pyrolysis Studies of Coal Dust Combustion. Final Technical Report.

Petrella-RV; Frost-JR; Frick-HR; Bowman-JJ
For Reference Only At Bureau Libraries :136 pages
The flash-induced combustion of sewell and Pittsburgh coals was studied in air and in oxygen. The primary decomposition and combustion processes occur within the first 300 usec in oxygen and slightly later in air. Strong absorption spectra of cn and oh are indicative of the decomposition and combustion processes. Kinetic spectroscopy and combustion product analyses indicate that only about 35 pct of the coal dust is consumed in the explosive combustion which takes place in several distinct but similar steps. The combustion-modifying effects of (nh4)2hpo3, nh4h2po4, khco3, and rock dust were studied in the 1- to 20-wt-pct range in coal dust flash combusted in air and in oxygen. The study shows rock dust to be the most efficient coal combustion inhibitor. The least effective agent, khco3, has phosphate salts showing marginal effectiveness.
Publication Date
Document Type
CP; Final Contract Report;
Fiscal Year
Identifying No.
OFR 47-78
NIOSH Division
Source Name
For Reference Only At Bureau Libraries
Performing Organization
Dow Chemical Company
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division