DRIFT SPECTROSCOPY AND OPTICAL REFLECTANCE OF HEAT-TREATED COAL FROM A QUENCHED GASIFIER

Coal samples collected from a quenched coal gasifier were characterize d for (thermal) heterogeneity by optical reflectance measurements. DRI FT spectroscopy served to estimate the final temperature to which the samples were exposed. Particle size information on the coal samples wa s superimposed on the results for the thermal history of the char samp les collected from the gasifier bed. A good match was found between th ese different sets of data. The implications for gasifier operation ar e discussed.