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Isotopically exchangeable organic hydrogen in coal relates to thermal maturity and maceral composition

Organic Geochemistry

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,
DOI: 10.1016/S0146-6380(02)00064-5

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Abstract

Hydrogen isotopic exchangeability (Hex) and ??Dn values of non-exchangeable organic hydrogen were investigated in coal kerogens ranging in rank from lignite to graphite. The relative abundance of Hex is highest in lignite with about 18% of total hydrogen being exchangeable, and decreases to around 2.5% in coals with Ro of 1.7 to ca. 5.7%. At Still higher rank (Ro > 6%), Hex increases slightly, although the abundance of total hydrogen decreases. ??Dn is influenced by original biochemical D/H ratios and by thermal maturation in contact with water. Therefore, ??Dn does not show an overall consistent trend with maturity. ?? 2002 Elsevier Science Ltd. All rights reserved.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Isotopically exchangeable organic hydrogen in coal relates to thermal maturity and maceral composition
Series title:
Organic Geochemistry
DOI:
10.1016/S0146-6380(02)00064-5
Volume
33
Issue:
8
Year Published:
2002
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Organic Geochemistry
First page:
921
Last page:
931
Number of Pages:
11