Cupric oxide oxidation of peat and coal humic acids

A sulphate lignin and humic acids of 5000-year-old peat, brown coal and black coal were subjected to cupric oxide oxidation. The compounds identified by GC-MS were lignin-derived phenolics, benzenecarboxylic acids and aliphatic mono- and dicarboxylic acids. Two lignin-derived phenolics, p-hydroxyben...

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Bibliographic Details
Published in:Science of the total environment 1992-01, Vol.117, p.75-82
Main Author: Haenninen, K
Format: Article
Language:English
Subjects:
Applied sciences
coal
cupric oxide oxidation
Energy
Exact sciences and technology
Fuel processing. Carbochemistry and petrochemistry
Fuels
humic acids
peat
Solid fuel processing (coal, coke, brown coal, peat, wood, etc.)
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Summary:A sulphate lignin and humic acids of 5000-year-old peat, brown coal and black coal were subjected to cupric oxide oxidation. The compounds identified by GC-MS were lignin-derived phenolics, benzenecarboxylic acids and aliphatic mono- and dicarboxylic acids. Two lignin-derived phenolics, p-hydroxybenzoic acid and vanillic acid were common to all matrices. The results showed lignin to be one of the source materials in humification and coalification processes. Its importance in humification should not be exaggerated, however. Additional research is required to confirm whether the unsaturation of peat HA is mainly olefinic, as suggested by this study, or mainly aromatic.
ISSN:0048-9697
1879-1026
DOI:10.1016/0048-9697(92)90074-3