The Coal Gasification Research Studies program consists of three tasks: (1) coal ash behavior studies; (2) high-pressure fluidization studies; and (3) high-temperature fluidization studies. Five fluidized-bed gasification runs were conducted in the 2-inch ID gasifier using char from Pittsburgh seam coal. The first two runs were made with char devolatilized at 1700/sup 0/F. The char used for the other three was devolatilized at 1400/sup 0/F to prevent the formation of metallic iron. Complete analysis of the first two runs has been completed and is presented in this report. In the high-pressure gasification studies the debugging of the data analysis computer program was completed and a series of experimental runs was conducted at ambient temperature and pressure this quarter. Ottawa sand was used as the bed material for these runs. Data were obtained at fluidizing gas velocities of between 1.5 and 2.7 times the minimum fluidization velocity at three radial positions in the bed. The results of these runs showed that the bubble frequency increased with increasing height above the gas distributor except at low velocities where incomplete fluidization occurs and that bubble frequency at the point closest to the wall was lower than at the center of the bed. The local bubble flow rate, defined as the product of the bubble frequency and average bubble pierced-length, at three radial positions in the bed was determined for two excess fluidization velocities. In general, increasing the excess fluidizing gas velocity increases the bubble flow rate. This suggests that the extra fluidizing gas added to the bed was preferentially distributed to the bubble phase. Also, the results indicate that the local bubble flow rate was lowest near the wall of the column. 6 references, 17 figures, 3 tables.