Three-dimensional laboratory simulation of the pressure dependency of UCG (underground coal gasification)
Western Research Institute conducted a series of laboratory tests of underground coal gasification (UCG) at 100, 300, and 500 psig to investigate the effects of pressure on UCG product gas quality. Pressure did not significantly influence methane production rates because high temperatures thermodynamically exclude methanation as a principal producer of methane. The methane produced in these experiments ws the result of pyrolysis reactions. Hydrogen and carbon monoxide production decreased in the higher pressure tests, as expected from chemical equilibrium calculations. Mass transfer influences on the cavity wall growth rates were indicated by the strong dependency of air mass flux on gas quality observed in all three experiments. The difference noted between steeply dipping bed and horizontal underground coal gasification performance as a function of pressure is probably attributable to differences in reactor geometries. 12 refs., 11 figs., 4 tabs.
- Research Organization:
- Western Research Inst., Laramie, WY (USA)
- DOE Contract Number:
- FC21-83FE60177
- OSTI ID:
- 5541510
- Report Number(s):
- DOE/FE/60177-2450; ON: DE88006024
- Country of Publication:
- United States
- Language:
- English
Similar Records
Rawlins UCG (underground coal gasification) Demonstration Project site characterization report
Rawlins UCG (underground coal gasification) Demonstration Project site characterization report
Related Subjects
010404* -- Coal
Lignite
& Peat-- Gasification
ALKANES
CALORIFIC VALUE
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMICAL REACTORS
COAL
COAL GASIFICATION
COMBUSTION PROPERTIES
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
EQUATIONS
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
GASIFICATION
HYDROCARBONS
HYDROGEN
IN-SITU GASIFICATION
IN-SITU PROCESSING
KINETICS
MASS TRANSFER
MATERIALS
METHANATION
METHANE
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PRESSURE DEPENDENCE
PROCESSING
PYROLYSIS
REACTION KINETICS
SIMULATION
SUBBITUMINOUS COAL
THERMOCHEMICAL PROCESSES
THERMODYNAMICS
YIELDS