Abstract
Using a Gieseler plastometer to measure the thermoplastic behavior, a systematic study of the change in fluid properties with progressive oxidative weathering of three high volatile A bituminous and one low volatile bituminous coal was performed. The degree of fluidity was found to decrease rapidly with initial oxidation and then more slowly with additional oxidation. The effect of oxidation on liquefaction behavior also was studied. A level of oxidation, which significantly reduced Gieseler fluidity, had no detrimental effect on the liquefaction conversion determined as ethyl acetate soluble material, of three of the four coals tested.
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