A Current Appraisal of Underground Coal Gasification.
NTIS: PB 209 274 Available for Reference At Bureau Libraries :285 pages
This report describes a study made for the Bureau of Mines to reevaluate undeground coal gasification technology. The technology was appraised to determine (1) whether the current (1971) state of the technology offers a technically feasible method for gasifying coal underground that is applicable to reserves of bituminous and lower rank coals in the United States; (2) whether a program of research and further development of the technology could ultimately make it a technically feasible alternative to curent open pit and underground coal mining operations; (3) what the nature and cost of further research and development work in the technology should be. The study showed that underground coal gasification in the United States is technically feasible, but economic feasibility is yet to be determined; new activity should obtain reliable production- oriented cost estimates for large-scale use of the product gas; technical objectives should include prevention of roof collapse and knowledge of burning face position and temperature. Cost of further work is estimated at $2.5 To $3.5 million.
NTIS Accession No.
NTIS: PB 209 274; Available for Reference At Bureau Libraries