Reactions of a high-volatile A bituminous coal in argon plasmas were studied. The effects of coal feed rate, coal particle size, and plasma temperature on yields and product composition were examined. Products were a solid residue and gas containing hydrogen, methane, acetylene, diacetylene, and carbon monoxide. Yields of gaseous products increased with increased temperature and decreased coal particle size. Acetylene, the principal hydrocarbon gas produced, was obtained in yields as high as 1 5 weight % of moistureand ash-free coal. In all experiments, plasmas contained sufficient energy to heat the coal to temperatures
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