Results of the Centralia underground coal gasification field test
The Centralia Partial Seam CRIP (PSC) test described herein is the second test conducted at this site. The first test was done in the fall and winter of 1981 to 1982 when the Large Block (LBK) tests were successfully completed at the Centralia, Washington site. The LBK tests consisted of five small scale experiments in which approximately 900 to 1800 cubic feet (25 to 50 cubic meters) of coal were affected in each test. The LBK tests indicated that the Centralia site was a reasonable candidate for UCG. The PSC test was then conceived along with a third test, the Full Seam CRIP test, to provide the technical data needed to further evaluate the economic potential of UCG at the Centralia site, as well as enhance our general knowledge concerning the UCG process. The PSC test represents a 20 to 30 fold increase in scale over the LBK tests with the full-seam test representing another five fold increase in size. This series of three tests have become known as the Tono Basin Tests. During the active gasification phase, which lasted 30 days, 1400 cubic meters (2000 tons) of coal were affected. The test utilized primarily steam and oxygen as the injected reactants. Three distinct periods of gasification were observed. The initial period in which the vertical production well was in use which yielded a typical dry gas heating value of 219 kJ/mol (248 Btu/scf). This period was followed by a period of considerably higher gas quality, 261 kJ/mol (296 Btu/scf), which resulted from the switch to the slant production well and the CRIP maneuver. The final period began when a large-scale underground roof fall occurred and the typical dry gas heating value fell to 194 kJ/mol (220 Btu/scf). 7 references, 11 figures, 3 tables.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6649695
- Report Number(s):
- UCRL-90680; CONF-840835-7; ON: DE84016191
- Country of Publication:
- United States
- Language:
- English
Similar Records
LLNL underground coal-gasification project. Quarterly progress report, October-December 1982
Centralia partial-seam CRIP test
Related Subjects
010404* -- Coal
Lignite
& Peat-- Gasification
COAL GASIFICATION
DATA
ELEMENTS
EXPERIMENTAL DATA
FEDERAL REGION X
FIELD TESTS
GASIFICATION
IN-SITU GASIFICATION
IN-SITU PROCESSING
INFORMATION
NONMETALS
NORTH AMERICA
NUMERICAL DATA
OXYGEN
PROCESSING
STEAM
TESTING
THERMOCHEMICAL PROCESSES
USA
WASHINGTON