During the twelfth quarter, the main thrust was determination of coal pyrolysis kinetics in the heated tube reactor. This involved measurement of particle temperature using FT-IR transmission and emission spectroscopy, residence time determinations with photodiodes, material balances, and FT-IR analysis of chars. The particle temperatures determined by FT-IR were generally close to those estimated from a knowledge of the gas temperature. The residence time determinations indicated that the particle velocity was between 80 and 100% of the average gas velocity, depending on size and the gas flow rate. Material balances done in the newer Inconel 702 tube agreed very well with those done previously in a stainless steel tube. The FT-IR char analyses were also consistent with previous results and the aliphatic region followed the trends of product yields quite closely. It was found that primary pyrolysis, measured by the initial rapid weight loss and the loss of aliphatic material, occurs between 50 cm and 115 cm for an equilibrium tube temperature of 800/sup 0/C and a cold gas velocity of approx.28 meters/second. The transit time over this distance is about 14 msec. while the particle temperature is increasing from 650 to 780/sup 0/C. The results suggest that k is at least 100 s/sup -1/ at 800/sup 0/C for the rate of evolution of tar and hydrocarbons which dominate primary pyrolysis and weight loss. Construction was nearly completed on the high pressure reactor system. A plan was formulated for the initial test phase. In addition, preliminary sulfur measurements were made on chars from entrained flow reactor system. 13 refs., 22 figs., 1 tab.