Abstract
The effects of oxygen on coal gasification characteristics have been investigated by using Drop Tube Furnace. In the pyrolysis tests the influences of oxygen in the oxidizer have been examined, and results show that the reactions in which oxygen don't take part isn't influenced by pressure. The gasification tests with changing oxygen fraction in oxidizer have been done, and results show that, for the high volatile matter coal gasification efficiency isn't influenced by oxygen fraction, but for the low volatile matter coal, it is improved by increasing the oxygen fraction. Moreover, the reactivity of the low volatile matter coal has been investigated, and the effects of oxygen fraction are clarified by comparing the effects of the temperature and the residence time of coal particle.
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