Mining or in situ disintegration of hard material – In situ conversion of solid to fluid – Input and output wells
Patent
1976-03-08
1977-04-19
Purser, Ernest R.
Mining or in situ disintegration of hard material
In situ conversion of solid to fluid
Input and output wells
166261, 166267, E21C 4300
Patent
active
040184811
ABSTRACT:
This invention relates to the production of combustible gases from coal in situ, in which one or more passages are established between the surface of the ground and an underground coal deposit. The coal is set afire and the fire is sustained by injection of an oxidizer for a period of time. Oxidizer injection is terminated, followed by injection of steam for a period of time into the hot coal bed. Produced gases are captured at the surface. Products of combustion from the burn cycle are saved at the surface, reconstituted by the addition of oxygen, then reinjected for subsequent burn cycles until the sulfur dioxide content is sufficiently high to warrant recovery in surface facilities. Condensible gases are cooled in surface facilities with liquids captured apart from noncondensible gases.
REFERENCES:
patent: 947608 (1910-01-01), Betts
patent: 3628929 (1971-12-01), Glass et al.
patent: 3734184 (1973-05-01), Scott
patent: 3794116 (1974-02-01), Higgins
"Underground Gasification of Coals," Cherin et al., The Colliery Guardian, vol. CLII, No. 3939, June 26, 1936.
"Four New Ways to Manufacture High BTU Gas From Coal," Chemical Engineering, Aug. 1947, pp. 104-106.
In Situ Technology Inc.
Purser Ernest R.
LandOfFree
Gasification of coal in situ does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Gasification of coal in situ, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gasification of coal in situ will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-99711