Abstract
A comparative study on pyrolysis and hydrogasification of a bituminous coal was conducted under non-isothermal heating at 3 K min −1 to 1200 K. The kinetics of C 1C 3 hydrocarbon formation were measured and total yields of the products were evaluated. The chemical and optical structures of the coal chars obtained at different temperatures were also investigated. At temperatures > 750 K, the influence of gas atmosphere (Ar or H 2) on the kinetics of hydrocarbon formation was found significant. The use of hydrogen atmosphere even at the relatively low experimental pressure of 2.5 MPa resulted in a high conversion (40%) of carbon to C 1C 3 hydrocarbons as well as in inhibition of the formation of optical anisotropic structures in the char.
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