Spontaneous Combustion of Coal and Maceral Enriched Fractions under Storage Pneumatic Transport Conditions: Final Report, March 1-December 31, 1987.

摘要

The objective of this project is to understand the mechanisms responsible for the spontaneous combustion of ultrafine (particle size < 250 mu m) bituminous coals and of maceral-enriched fractions under storage, air flow, and/or dense-phase pneumatic transport conditions. Specifically, this research attempts to understand physical interactions and chemical reaction pathways, which may lead to spontaneous ignition of bituminous coals, by examining the role played by maceral type and concentration, by water wetting, by particle size, by volatile content, by moisture content, and by ash content on the low temperature oxidation susceptibility and ignition characteristics of bituminous coals. To determine the role of these factors, spontaneous ignition temperature measurements, low temperature oxidation measurements via Fourier transform infrared (FTIR) analyses, and differential scanning calorimetry measurements were made on eight bituminous coals from the Hartshorne seam, on Elkhorn No. 3 high-volatile bituminous coal, and on pure maceral fractions of bituminous coal. 27 refs., 62 figs., 7 tabs. (ERA citation 14:021634)