Characteristics of in situ coal gasification liquids from a cretaceous coal
The concept of harnessing energy from fossil fuel by gasification of coal in the ground has been revived with the aim to increase usuable coal reserves and to minimize the environmental impacts of mining and other problems. We report here the characteristics of liquids formed as a by-product of an underground gasification pilot test burn of a Cretaceous coal seam at a central Alberta location. The simplicity of the composition of liquids produced suggests that in situ coal gasification may be an economically viable source of refinery feeds or fuel.
Chemical structure of Wyodak coal
Abstract The chemical structure of a sub-bituminous coal from the Wyodak seam, Wyoming, has been investigated using the technique of per TFA oxidative degradation. The relative amounts of products differ markedly from those from a typical bituminous coal (Illinois No. 6 seam, Monterey mine).
Evolution of volatile hydrocarbons from coal
The products in the range C4 to C10 obtained from a series of coals by heating in stages from ambient temperature up to 700° have been analysed by gas-liquid chromatography. Aliphatic and aromatic compounds are evolved even below 100°. The rates of evolution do not increase regularly with temperature, but show two distinct maxima. Coals of different rank, and different macerals of the same coal, are compared.