1984
DOI: 10.1016/0146-6380(84)90059-7
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Role of the mineral matrix during kerogen pyrolysis

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Cited by 173 publications
(72 citation statements)
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“…This contradiction can be due to intense degradation, which has been shown to reduce the hydrogen richness of sedimentary organic matter and ultimately lower HI values (Espitalié et al, 1977). An alternative explanation is that a large fraction of hydrocarbons may be adsorbed by clay minerals in TOC-poor sediments, which also can result in artificially low HI values (Espitalié et al, 1984).…”
Section: Rock-eval Pyrolysismentioning
confidence: 98%
“…This contradiction can be due to intense degradation, which has been shown to reduce the hydrogen richness of sedimentary organic matter and ultimately lower HI values (Espitalié et al, 1977). An alternative explanation is that a large fraction of hydrocarbons may be adsorbed by clay minerals in TOC-poor sediments, which also can result in artificially low HI values (Espitalié et al, 1984).…”
Section: Rock-eval Pyrolysismentioning
confidence: 98%
“…Because of their high surface area (Sing 1985), clay minerals (especially smectite) have the ability to strongly adsorb pyrolysate (Espitalie et al 1980(Espitalie et al , 1984, especially the heavy compounds (Katz 1983). Clay minerals tend to catalyse the kerogen to generate more CO 2 , light hydrocarbons and aromatic compounds (Espitalié et al 1984;Larter 1984;Tannenbaum et al 1986;Lu et al 1989). A disproportionation of hydrogen occurs in the pyrolyser, enhancing C 1 -C 5 yield while simultaneously depositing dead carbon, bringing about diminished HIs and lower yields of heavy compounds in Py-GC data, and being more refractory from a kinetic perspective.…”
Section: Comparison and Discussionmentioning
confidence: 99%
“…The operating conditions of such systems are however very far from geological conditions as no pressure can be applied to the kerogen, and pyrolysis occurs simultaneously with thermal extraction, usually with a programmed temperature ramp from 300 to 650°C. The high final temperature precludes operating on a whole rock, because of catalytic artefacts by dehydrated minerals (Espitalié et al, 1984). Qualitative analytical pyrolysis can be performed by coupling the pyrolysis chamber to a GC column, maintained at low temperature during the pyrolysis step to trap effluents on the column head, then transporting them selectively by the usual temperature program.…”
Section: Basic Principles Of Pyrolysis Applied To Kerogen Characterizmentioning
confidence: 99%