Underground-coal-gasification cavity simulator with solid motion

Conference · Wed Jun 01 04:00:00 EDT 1983

OSTI ID:5815815

Thorsness, C B; Cena, R J

The prediction of cavity growth and product composition have long been major goals in the development of underground coal gasification (UCG). Lawrence Livermore National Laboratory (LLNL) is developing a UCG cavity growth model which incorporates many of the key features observed during our recent large block (LBK) tests conducted at the WIDCo mine at Centralia, Washington, in which early cavity growth and product yield were studied. Postburn excavation following the tests revealed oval-shaped, rubble-filled cavities with significant void space under the cavity roof. The bottom portion of the cavity contained ash and slag, with an overlying rubble region of coal, char, and ash. A void space existed between the rubble pile and the cavity roof which was generally flat with square corners, a result of the apparent breaking away and falling in of the roof material. In this paper, basic features of the model are described and a number of preliminary runs are documented. These runs include matching of the LBK data, studies of sensitivity to variations in model parameters and operational parameters, and calculations of possible performance of the upcoming Centralia partial-seam CRIP test.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5815815
• Report Number(s): UCRL-89084; CONF-830827-6; ON: DE83016530
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
CAVITIES
COAL GASIFICATION
GASIFICATION
GROWTH
IN-SITU GASIFICATION
IN-SITU PROCESSING
MATHEMATICAL MODELS
PROCESSING
TESTING
THERMOCHEMICAL PROCESSES
VALIDATION