LLNL underground-coal-gasification project. Quarterly progress report, April-June 1982

Technical Report · Fri Aug 06 04:00:00 EDT 1982

OSTI ID:7024832

Cavity mapping has been completed for the large block experiments, which were done near Centralia, Washington, in the winter of 1981-1982. Postburn excavations into the experimental sites show all the cavities to be largely filled with rubble consisting of dried coal, char, ash, and slag. None of the five injection holes remained completely open through its associated cavity. Temperature histories for all the in situ thermocouples in the large block experiments have been analyzed. The interpretation of most of this temperature data is straightforward and consistent with other observations. As a further refinement in our underground coal gasification (UCG) modeling effort, transient temperature profiles have been calculated for open borehole gasification in wet coal by the isotherm migration method, using the LSODE computer code developed at LLNL. The next logical step in this calculation would be to make the rate of combustion surface movement a function of the rate of steam generation at the vaporization interface. Follow-up observations have continued at the Hoe Creek UCG experiment sites in Wyoming. Phenols have been detected at very low but significant levels in groundwater 400 ft from the Hoe Creek 2 experiment, which was done in 1977. It appears important to continue this investigation of phenol transport at Hoe Creek, and to extend it by drilling and sampling additional wells. The controlled retracting injection point (CRIP) technique, which was devised for UCG application, may also have applications in enhanced recovery of crude oil.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7024832
• Report Number(s): UCRL-50026-82-2; ON: DE83002607
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
010900 -- Coal
Lignite
& Peat-- Environmental Aspects
AROMATICS
BOREHOLES
CAVITIES
CHEMICAL ANALYSIS
COAL GASIFICATION
DATA
ENVIRONMENTAL EFFECTS
EXPERIMENTAL DATA
FIELD TESTS
GASIFICATION
GROUND WATER
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
IN-SITU GASIFICATION
IN-SITU PROCESSING
INFORMATION
MATHEMATICAL MODELS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHENOLS
POLLUTION
PROCESSING
QUANTITATIVE CHEMICAL ANALYSIS
TEMPERATURE MEASUREMENT
TESTING
THERMOCHEMICAL PROCESSES
WATER
WATER POLLUTION