Thermal decomposition of Tipton Member, Green River Formation oil shale from Wyoming

Technical Report · Thu Sep 01 04:00:00 EDT 1988

OSTI ID:5535264

Miknis, F P; Turner, T F

Isothermal pyrolysis studies have been conducted on a Tipton Member, Green River Formation oil shale from Wyoming. The conversion of kerogen to bitumen, oil, gas and residue products was obtained for different isothermal reaction times in the temperature range of 648 to 698 K using a heated sand bath reactor system. Particular attention was paid to the formation of the bitumen intermediate during decomposition and its temperature dependence. The maximum amount of extractable bitumen was found to increase with temperature. The observation is consistent with an oil shale decomposition model in which the activation energy for kerogen decomposition is greater than the activation energy for bitumen decomposition. The thermal decomposition data were fit using a nonlinear least-squares computer program. When the stoichiometric coefficients were held constant for all temperatures, the calculated activation energies for kerogen and bitumen decomposition were 64.4 and 37.9 kcal/mol, respectively. 17 refs., 3 figs., 4 tabs.

• Research Organization: Western Research Inst., Laramie, WY (USA)
• Sponsoring Organization: DOE/FE
• DOE Contract Number: FC21-86MC11076
• OSTI ID: 5535264
• Report Number(s): DOE/MC/11076-2702; ON: DE89000971
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
040500* -- Oil Shales & Tar Sands-- Properties & Composition
ACTIVATION ENERGY
ARRHENIUS EQUATION
BITUMENS
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
DECOMPOSITION
ENERGY
ENERGY SOURCES
EQUATIONS
FOSSIL FUELS
FUELS
GEOLOGIC FORMATIONS
GREEN RIVER FORMATION
KEROGEN
MATERIAL BALANCE
MATERIALS
OIL SHALES
ORGANIC COMPOUNDS
ORGANIC MATTER
OTHER ORGANIC COMPOUNDS
PYROLYSIS
STOICHIOMETRY
TAR
TEMPERATURE DEPENDENCE
THERMOCHEMICAL PROCESSES
YIELDS