A mechanistic model for axisymmetric cavity growth during underground coal gasification
- Lawrence Livermore National Laboratory, CA (USA)
A model for cavity growth and gas production during UCG, based on the assumption of cylindrical cavity symmetry and applicable for gasification of shrinking coals when injection low in the coal seam can be maintained, has been developed. The model is highly idealized, but treats includes all important factors impacting cavity growth such as water influx, porous media flow, heterogeneous and homogeneous chemical reactions, radiative and convective heat transfer, and rock mechanics. Model predictions have been shown to agree very well with available field data, and while detailed produced gas compositions cannot be estimated, it is felt quite adequate to describe in a semiquantitative fashion cavity evolution, energy recovery, aquifer response, and effects of process parameter changes, and therefore is a useful tool for UCG site characterization and module optimization.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5290748
- Report Number(s):
- CONF-8806317--
- Journal Information:
- Preprints of Papers, American Chemical Society, Division of Fuel Chemistry; (USA), Journal Name: Preprints of Papers, American Chemical Society, Division of Fuel Chemistry; (USA) Vol. 33:2; ISSN 0569-3772; ISSN ACFPA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010404* -- Coal
Lignite
& Peat-- Gasification
BROWN COAL
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CAVITIES
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COAL DEPOSITS
COAL GAS
COAL GASIFICATION
COAL SEAMS
COMPARATIVE EVALUATIONS
ELEMENTS
ENERGY SOURCES
ENERGY TRANSFER
FIELD TESTS
FLUID FLOW
FLUIDS
FOSSIL FUELS
FUELS
GAS FLOW
GASES
GASIFICATION
GEOLOGIC DEPOSITS
GEOMETRY
HEAT TRANSFER
HYDROGEN
IN-SITU GASIFICATION
IN-SITU PROCESSING
LIGNITE
MATERIALS
MATHEMATICAL MODELS
MATHEMATICS
MECHANICS
MINERAL RESOURCES
MOUNTAINS
NONMETALS
OXIDES
OXIDIZERS
OXYGEN COMPOUNDS
PERMEABILITY
POROSITY
PROCESSING
RESOURCES
ROCK MECHANICS
ROCKY MOUNTAINS
SUBBITUMINOUS COAL
SYNTHESIS
TESTING
THERMOCHEMICAL PROCESSES
WATER INFLUX