Shale oil developments: kinetics of oil shale pyrolysis
Journal Article
·
· Chem. Eng. Prog.; (United States)
OSTI ID:6554967
Steady-state decomposition data show the rate determining reactions to be logistic or autocatalytic functions. A mechanism is developed explaining how insoluble organic matter in oil shale decomposes to form fluid hydrocarbons. Thermogravimetric analysis has been applied to a study of the pyrolysis of Colorado oil shale. Using very slow heating rates, pseudo steady-state devolatilization data have been obtained. These data show a critical temperature for complete pyrolysis of oil shale to be about 880/sup 0/F. Analysis of the data in detail also shows a heat of pyrolysis of about ll kcal/g mole is required to convert the bitumen in oil shale to volatile hydrocarbons. In addition, a heat of about 9.4 kcal/g per mole is required to volatilize the hydrocarbons. This leads to a value of 20.4 kcal/g mole required to separate shale oil by pyrolysis from the inorganic material. At temperatures below 900/sup 0/F, the decomposition of the insoluble organic matter (kerogen) into the soluble bitumen is a fairly rapid step compared to the decomposition of bitumen to the hydrocarbon-like materials.
- Research Organization:
- Marathon Oil Co
- OSTI ID:
- 6554967
- Journal Information:
- Chem. Eng. Prog.; (United States), Journal Name: Chem. Eng. Prog.; (United States) Vol. 62:8; ISSN CEPRA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
04 OIL SHALES AND TAR SANDS
040400* -- Oil Shales & Tar Sands-- Oil Production
Recovery
& Refining
BITUMENS
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CHEMICAL ANALYSIS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FUELS
GRAVIMETRIC ANALYSIS
HIGH TEMPERATURE
KEROGEN
KINETICS
MATERIALS
MINERAL OILS
OIL SHALES
OILS
ORGANIC COMPOUNDS
ORGANIC MATTER
OTHER ORGANIC COMPOUNDS
PYROLYSIS
QUANTITATIVE CHEMICAL ANALYSIS
REACTION KINETICS
SHALE OIL
TAR
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
THERMOCHEMICAL PROCESSES
040400* -- Oil Shales & Tar Sands-- Oil Production
Recovery
& Refining
BITUMENS
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CHEMICAL ANALYSIS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FUELS
GRAVIMETRIC ANALYSIS
HIGH TEMPERATURE
KEROGEN
KINETICS
MATERIALS
MINERAL OILS
OIL SHALES
OILS
ORGANIC COMPOUNDS
ORGANIC MATTER
OTHER ORGANIC COMPOUNDS
PYROLYSIS
QUANTITATIVE CHEMICAL ANALYSIS
REACTION KINETICS
SHALE OIL
TAR
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
THERMOCHEMICAL PROCESSES