A. Karcz et S. Porada, FORMATION OF C-1-C-3 HYDROCARBONS DURING PRESSURE PYROLYSIS AND HYDROGASIFICATION IN RELATION TO STRUCTURAL-CHANGES IN COAL, Fuel, 74(6), 1995, pp. 806-809
A comparative study on pyrolysis and hydrogasification of a bituminous
coal was conducted under non-isothermal heating at 3 K min(-1) to 120
0 K. The kinetics of C-1-C-3 hydrocarbon formation were measured and t
otal yields of the products were evaluated. The chemical and optical s
tructures of the coal chars obtained at different temperatures were al
so investigated. At temperatures > 750 K, the influence of gas atmosph
ere (Ar or H-2) on the kinetics of hydrocarbon formation was found sig
nificant. The use of hydrogen atmosphere even at the relatively low ex
perimental pressure of 2.5 MPa resulted in a high conversion (40%) of
carbon to C-1-C-3 hydrocarbons as well as in inhibition of the formati
on of optical anisotropic structures in the char.