Abstract
The extension of shock tube techniques to the study of ignition and burnout of pulverized coal is examined. Nonintrusive optical techniques for characterizing the particle size distribution and the particle temperature as a function of time during burnout are described. Comparison of surface oxidation rates of soot particles and several bituminous coals obtained in the shock tube are in excellent agreement with the higher temperature results found in other apparatus. Because of the wide but controllable ranges of total pressures, oxygen parital pressures, particle temperatures, and coal loadings obtainable, the shock tube offers an additional instrument for the study of solid particle ignition and reactivity under conditions comparable to those found in mine explosions and anticipated in high intensity combustors.
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