Coal plasticity at high heating rates and temperatures. Twelfth technical progress report, first quarter: January 1, 1993--March 31, 1993

The results of the multiple independent parallel reaction (MIPR) kinetics model are reported and discussed. The MIPR model`s results agree well with the data. The effects of holding temperature, heating rate, and coal type on plasticity are displayed by the model. However, the model does not address the secondary reactions forming higher molecular weight liquid hypothesized to be responsible for the initial rise in viscosity during solidification. The average standard error of estimates for the plastic period and maximum plasticity are 0.13 s and 317 Pa-s, respectively. These values are comparable to the measurement resolution of the plastometer (0.1 s and {plus_minus} 200 Pa{center_dot}s).