Abstract
The effects of reaction temperature, oxygen/coal and steam/coal ratios and residence time on coal gasification performance in entrained flow were determined by means of a drop tube reactor (0.05 m.i.d. × 1.0 m high). The H 2 CO molar ratio decreases with increasing reaction temperature and the H 2 + CO content of the product gas exhibit a maximum around the ash fusion temperature. With increasing O 2 content, carbon conversion increases and the rate of production of H 2 and CO increases initially to a maximum value. The optimum O 2 coal ratio is in the range 0.6-0.9 for different coals.
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