E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/25
E21B 43/27 (2006.01) E21B 43/16 (2006.01) E21B 43/18 (2006.01) E21B 43/24 (2006.01) E21B 43/243 (2006.01) E21B 43/40 (2006.01)
Patent
CA 1170977
ABSTRACT OF THE DISCLOSURE Method for the underground gasification of solid fuels in which an underground fuel deposit is initially opened up and then converted into a gaseous fuel by means of a gasification medium. The opening of the fuel deposit is effected in a novel manner by treatment with a gas which is in the supercritical state, the gas taking on the volatile organic substances of the solid fuel and the water contained in the solid fuel. The dissolved organic compounds and the water are separated from the charged supercritical gas phase above ground in at least two fractions by pressure reduction and/or a change in temperature. This novel process overcomes the drawback of known processes which cannot remove volatile organic components from the solid fuel, the volatile organics clogging gas permeable pores and cracks existing in the underground solid fuel thus pre- venting or hindering underground gasification.
398860
Coenen Hubert
Kriegel Ernst
Fetherstonhaugh & Co.
Krupp (fried.) Gesellschaft Mit Beschrankter Haftung
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