Coal Pyrolysis at Fire-Level Heat Flux

Pyrolysis of Pittsburgh Seam coal at fire-level surface heat fluxes of 0.76 and 2.0 cal/cm2-sec was investigated by means of measurements of mass-loss rate, density, temperature and internal gas pressure of pyrolyzing coal and thermal properties of coal and coke. Local and overall heats of pyrolysis were determined from these measurements at 2.0 cal/cm2-sec. It was found that as coal pyrolyzes, a surface coke layer (580 °C