Indigenous mineral matter effects in pyrolysis of Green River oil shale
Conventional oil shale processing technology is based upon thermal decomposition of kerogen into various grades of oil products. Historically, a variety of pyrolysis conditions, involving both above ground and in situ retorting operations, have been used to obtain shale oil. Numerous kinetic studies have investigated temperature and pressure effects. Both isothermal and nonisothermal kinetic methods have been used. These studies have established that the decomposition involves a series of consecutive reactions in which the kerogen is first converted to bitumen which, in turn, generates a form of volatile matter which eventually is reduced to coke, oil, and gas, The physicochemical properties of oil shale undoubtedly influence the decomposition process. A number of studies have been published concerning the effects of the mineral constituents of oil shale on the pyrolysis process. The inorganic mineral matrix is known to be intimately associated with the organic fraction, both kerogen and bitumen, and therefore, is believed to affect the release of oil products. Previous thermogravimetric studies of oil shale have attempted to demonstrate the influence of minerals by monitoring the characteristic organic carbon decomposition step of specially prepared mixtures and the composition of the pyrolysate. The results of both Espitalie, et al., and Horsfield and Douglas indicate that the lower oil yield for oil shale rock as compared to isolated kerogen is due to the release of smaller quantities of higher molecular weight hydrocarbons. These results are interpreted either as the result of a trapping mechanism or condensation/gasification processes, respectively.
- Research Organization:
- Gulf Research and Development Co., Pittsburgh, PA
- OSTI ID:
- 6159721
- Report Number(s):
- CONF-830303-
- Journal Information:
- Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States), Vol. 28:1; Conference: 185. American Chemical Society national meeting, Seattle, WA, USA, 20 Mar 1983
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CARBONATE MINERALS
CATALYTIC EFFECTS
OIL SHALES
PYROLYSIS
SILICATE MINERALS
CHEMICAL REACTION YIELD
GREEN RIVER FORMATION
OIL SHALE DEPOSITS
PYRITE
SOLVENT EXTRACTION
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
DECOMPOSITION
ENERGY SOURCES
EXTRACTION
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
GEOLOGIC FORMATIONS
IRON COMPOUNDS
IRON SULFIDES
MATERIALS
MINERAL RESOURCES
MINERALS
RESOURCES
SEPARATION PROCESSES
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
YIELDS
040500* - Oil Shales & Tar Sands- Properties & Composition
040402 - Oil Shales & Tar Sands- Surface Methods