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).
The smaller molecules obtainable from coal and their significance: Part 1. Solvent extraction of a weakly-caking coal at atmospheric pressure
During prolonged extraction of a weakly-caking bituminous coal with benzene/ethanol (7:3 by volume), hydrocarbons of larger critical diameters predominated in the earlier extracts; the range of n -alkanes, approximately C 12 –C 40 , emerged relatively evenly throughout; and small finite amounts of olefins were found after 50 h. The total amount of hydrocarbons extracted in 250 h was twice that obtained in 50 h. These observations are explained on the basis of molecular sieve and adsorption effects.