Evidence for long-chain aliphatic structures in sporinite kerogen by alakaline potassium permanganate oxidation
- GeoChem Labs. (Canada) Ltd., Calgary, Alberta
The work reported here represents a part of a study undertaken to compare chemical similarities and differences between different macerals and outlines the results of oxidative degradation of a series of sporinite concentrates isolated from Carboniferous coals of high-volatile bituminous rank. The oxidizing agent is potassium permanganate which is added to the sporinite dispersed in an excess of 1.6% KOH solution at 80/sup 0/C. After fractionation by thin-layer chromatography, the components were analyzed by gas chromatography. n-Alkyl moieties are present in at least two modes in sporinite kerogen, although they represent very small proportions of the total structure. Singly-bonded peripheral alkyl chains have been found, with chain length distributions which suggest direct incorporation of fats and waxes from the original plants. Coalification slowly modifies the structures so that specific biological identities are slowly obliterated. Diterminally bonded polymethylene chains are also present, and these structures are thought to develop during early diagenesis through complex reaction pathways involving functionalized lipids and polyfunctional substrates. The oxidation data suggest that oxidizable n-alkyl moieties are slowly expelled from the kerogen matrix, for recoveries decline as the rank of the sporinite increases. However, caution must be exercised in interpreting data from a single degradation technique,for pyrolytic degradation yielded significant quantities of n-alkanes from all the sporinite kerogens. Thus, it would appear that further n-alkyl moieties must be present, but incorporated in a manner which is not susceptible to alkaline permanganate oxidation.
- OSTI ID:
- 6401013
- Report Number(s):
- CONF-810308-(Vol.3)
- Journal Information:
- Am. Chem. Soc., Div. Fuel Chem., Prepr.; (United States), Vol. 26:1; Conference: American Chemical Society symposium on the chemistry of engine combustion deposits, Atlanta, GA, USA, 29 Mar 1981
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CARBOXYLIC ACIDS
GAS CHROMATOGRAPHY
DICARBOXYLIC ACIDS
KEROGEN
CHEMICAL REACTIONS
OXIDATION
POTASSIUM HYDROXIDES
POTASSIUM PERMANGANATES
BITUMINOUS COAL
CRUSHING
FLOTATION
MEDIUM TEMPERATURE
STRUCTURAL CHEMICAL ANALYSIS
ZINC CHLORIDES
ALKALI METAL COMPOUNDS
BITUMINOUS MATERIALS
BLACK COAL
CARBONACEOUS MATERIALS
CHLORIDES
CHLORINE COMPOUNDS
CHROMATOGRAPHY
COAL
COMMINUTION
ENERGY SOURCES
FOSSIL FUELS
FUELS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
HYDROXIDES
MANGANESE COMPOUNDS
MATERIALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC MATTER
OXYGEN COMPOUNDS
PERMANGANATES
POTASSIUM COMPOUNDS
SEPARATION PROCESSES
TRANSITION ELEMENT COMPOUNDS
ZINC COMPOUNDS
ZINC HALIDES
010600* - Coal
Lignite
& Peat- Properties & Composition
400102 - Chemical & Spectral Procedures