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An evaluation of Rock-Eval pyrolysis for the study of Australian coals including their kerogen and humic acid fractions

Identifieur interne : 001A87 ( Istex/Curation ); précédent : 001A86; suivant : 001A88

An evaluation of Rock-Eval pyrolysis for the study of Australian coals including their kerogen and humic acid fractions

Auteurs : T. V Verheyen [Australie] ; R. B Johns [Australie] ; J. Espitalié [France]

Source :

Geochimica et Cosmochimica Acta [ 0016-7037 ] ; 1984.

RBID : ISTEX:8E619B279DBAD9E900B566762800412C7711C5AE

Descripteurs français

Wicri :
- topic : Charbon, Hydrocarbure, Réunion internationale, Exploration pétrolière.

English descriptors

Abstract

Abstract: Rock-Eval pyrolysis was performed on lithotype and depth profiles of Tertiary brown coals and a coalification profile of Permian bituminous coals. The humic acid and kerogen fractions from the coals are also investigated by this technique along with the effect of base extraction on the kerogen fraction. Structural variations between brown coal lithotypes are primarily reflected by changes in Oxygen Index Value. This result was supported by the results from the depth profile (same lithotype). A wide range of Hydrogen Indices (independent of depth) but similar Oxygen Indices were observed. The results from the Qualification profile show that the Oxygen Indices varied with rank, whereas Hydrogen Indices show a greater dependence on coal type. A plot of HCversus Hydrogen Index produced good correlations with the brown (0.77) and bituminous (0.90) samples lying on two separate lines intersecting at high H/C. This result (and higher correlation for bituminous samples) reflects the expected dependence of hydrogen index on oxygen content (present primarily as hydroxyl groups). A high correlation (0.95) between quantitative IR data (K 2920 cm mg−1) and Hydrogen Indices supports previous conclusions regarding the dependence of Hydrogen Indices on the aliphatic structure of the samples.

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https://api.istex.fr/document/8E619B279DBAD9E900B566762800412C7711C5AE/fulltext/pdf

DOI: 10.1016/0016-7037(84)90349-1

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<term>Analytical data</term>
<term>Atomic ratio</term>
<term>Australian coals</term>
<term>Base extraction</term>
<term>Bituminous</term>
<term>Bituminous coal</term>
<term>Bituminous coal samples</term>
<term>Bituminous coals</term>
<term>Bituminous samples</term>
<term>Brown coal</term>
<term>Brown coal samples</term>
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<term>Coal lithotypes</term>
<term>Coal samples</term>
<term>Coal structure</term>
<term>Component classes</term>
<term>Correlation coefficient</term>
<term>Correlation coefficients</term>
<term>Data points</term>
<term>Depositional environments</term>
<term>Depth profile</term>
<term>Durand</term>
<term>Elemental analysis</term>
<term>Evolutionary stage</term>
<term>Extractable</term>
<term>Extractable humic acid</term>
<term>Good correlation</term>
<term>Higher oxygen content</term>
<term>Humic</term>
<term>Humic acid</term>
<term>Humic acid fractions</term>
<term>Hydrocarbon</term>
<term>Hydrocarbon production</term>
<term>Hydrogen index</term>
<term>Hydrogen indices</term>
<term>Hyorogen index</term>
<term>Insoluble material</term>
<term>Insoluble residue</term>
<term>International meeting</term>
<term>Kerogen</term>
<term>Kerogen fractions</term>
<term>Kerogen samples</term>
<term>Kerogen structure</term>
<term>Kerogen types</term>
<term>Kerogens</term>
<term>Krevelen diagram</term>
<term>Light lithotypes</term>
<term>Lithotype</term>
<term>Lithotypes</term>
<term>Major fractions</term>
<term>Mine samples</term>
<term>Oxygen content</term>
<term>Oxygen index</term>
<term>Parent coal</term>
<term>Parent coals</term>
<term>Petroleum exploration</term>
<term>Pyrolysis</term>
<term>Pyrolysis temperature</term>
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<term>Series coals</term>
<term>Solvent extractable material</term>
<term>Solvent extraction</term>
<term>Solvent incorporation</term>
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<term>Thermal distillation</term>
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<term>Total number</term>
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<term>Vitrinite reflectance</term>
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<term>Bituminous</term>
<term>Bituminous coal</term>
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<term>Coal structure</term>
<term>Component classes</term>
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<term>Correlation coefficients</term>
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<term>Elemental analysis</term>
<term>Evolutionary stage</term>
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<term>Higher oxygen content</term>
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<term>Hydrogen indices</term>
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<term>Insoluble residue</term>
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<term>Kerogen fractions</term>
<term>Kerogen samples</term>
<term>Kerogen structure</term>
<term>Kerogen types</term>
<term>Kerogens</term>
<term>Krevelen diagram</term>
<term>Light lithotypes</term>
<term>Lithotype</term>
<term>Lithotypes</term>
<term>Major fractions</term>
<term>Mine samples</term>
<term>Oxygen content</term>
<term>Oxygen index</term>
<term>Parent coal</term>
<term>Parent coals</term>
<term>Petroleum exploration</term>
<term>Pyrolysis</term>
<term>Pyrolysis temperature</term>
<term>Same lithotype</term>
<term>Series coals</term>
<term>Solvent extractable material</term>
<term>Solvent extraction</term>
<term>Solvent incorporation</term>
<term>Source rocks</term>
<term>Thermal distillation</term>
<term>Thermal maturation</term>
<term>Total hydrocarbons</term>
<term>Total number</term>
<term>Verheyen</term>
<term>Vitrinite reflectance</term>
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<front><div type="abstract" xml:lang="en">Abstract: Rock-Eval pyrolysis was performed on lithotype and depth profiles of Tertiary brown coals and a coalification profile of Permian bituminous coals. The humic acid and kerogen fractions from the coals are also investigated by this technique along with the effect of base extraction on the kerogen fraction. Structural variations between brown coal lithotypes are primarily reflected by changes in Oxygen Index Value. This result was supported by the results from the depth profile (same lithotype). A wide range of Hydrogen Indices (independent of depth) but similar Oxygen Indices were observed. The results from the Qualification profile show that the Oxygen Indices varied with rank, whereas Hydrogen Indices show a greater dependence on coal type. A plot of HCversus Hydrogen Index produced good correlations with the brown (0.77) and bituminous (0.90) samples lying on two separate lines intersecting at high H/C. This result (and higher correlation for bituminous samples) reflects the expected dependence of hydrogen index on oxygen content (present primarily as hydroxyl groups). A high correlation (0.95) between quantitative IR data (K 2920 cm mg−1) and Hydrogen Indices supports previous conclusions regarding the dependence of Hydrogen Indices on the aliphatic structure of the samples.</div>
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An evaluation of Rock-Eval pyrolysis for the study of Australian coals including their kerogen and humic acid fractions

An evaluation of Rock-Eval pyrolysis for the study of Australian coals including their kerogen and humic acid fractions

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri