Preliminary Evaluation of Underground Coal Gasification At Hanna, Wyo.
Campbell GG; Brandenburg CF; Boyd RM
NTIS: PB 241-925 :14 pages
The Bureau of Mines initiated a field test of underground coal gasification to investigate the technologic feasibility of gasifying a subbituminous coal. The test site is near the town of Hanna, Wyoming, about 70 miles northwest of Laramie. Preliminary results of the experiment are described. The coal was ignited in the central well of a 16-well pattern. Both forward and reverse combustion techniques were attempted to prepare a path of sufficient permeability to permit the high air injection rates necessary for gasification. Gasification between linked wellbores was sustained for periods as long as 3 months. Hydrogen-rich gas having a heating value of 100 to 150 btu/scf was produced. Work done in cooperation with the University of Wyoming.
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