Effect of oxygen on composition of light hydrocarbons evolved in oil shale pyrolysis
The changes in the absolute and relative levels of light alkane and alkene hydrocarbons evolved during the thermal degradation of oil shale have been studied with respect to pyrolysis atmosphere for milligram samples. Programmed temperature gas--solid chromatography on Spherocarb carbon molecular sieve gives effective resolution of alkane--alkene pairs up to the C/sub 5/ compounds. n-Alkane formation is favored over that of 1-alkenes under inert pyrolysis, but the alkane/alkene ratios decrease as the atmospheric oxygen content is raised to the 10% level. Thereafter they change relatively little up to 20% oxygen atmosphere. Absolute amounts of alkanes evolved increase up to a 5% oxygen level as do those of alkenes, which however exhibit the effect to a considerably greater degree. Absolute amounts of all the light hydrocarbon gases evolved decrease markedly above the 5% oxygen level. 7 figures, 1 table.
- Research Organization:
- Univ. of Massachusetts, Amherst
- OSTI ID:
- 6315836
- Journal Information:
- Anal. Chem.; (United States), Vol. 51:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALKANES
CHEMICAL REACTION YIELD
ALKENES
OIL SHALES
PYROLYSIS
COMPARATIVE EVALUATIONS
EXPERIMENTAL DATA
GAS CHROMATOGRAPHY
HELIUM
HIGH TEMPERATURE
ION EXCHANGE MATERIALS
ISOLATED VALUES
OXIDATION
QUANTITATIVE CHEMICAL ANALYSIS
QUANTITY RATIO
SEPARATION PROCESSES
TEMPERATURE DEPENDENCE
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHROMATOGRAPHY
CRYOGENIC FLUIDS
DATA
DATA FORMS
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
HYDROCARBONS
INFORMATION
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
RARE GASES
THERMOCHEMICAL PROCESSES
YIELDS
040402* - Oil Shales & Tar Sands- Surface Methods