During the thirteenth quarter, the main thrust was determination of coal pyrolysis kinetics in the heated tube reactor. This involved measurement of particle temperatures using FT-IR transmission and emission spectroscopy, and developing a heat transfer model to predict the results. Once the particle temperature could be accurately measured and predicted, adjustments were made in the pyrolysis rate constants for individual species to match the observed evolution data. The possible reasons for the discrepancies between our kinetic data and those of other investigators were examined. The results suggest a reinterpretation of heated grid and entrained flow reactor data which have given much lower rates at comparable temperatures. Much of the kinetic data and analysis was summarized in papers submitted to the ACS Division of Fuel Chemistry (Spring, 1985 meeting) and to the Journal of Fuel. Construction was completed on the high pressure reactor system and the test phase was begun. A patent application was filed for the temperature and species concentration measurement techniques involving FT-IR transmission and emission spectroscopy. A summary is included as a section of this report. In addition, sulfur measurements were made on chars from the entrained flow reactor system and the heated tube reactor. The preliminary results indicated the presence of tightly bound organic sulfur. 31 refs., 23 figs., 2 tabs.