Preserved lignin structures in Miocene-aged lignite lithotypes, Bulgaria. - Archive ouverte HAL Access content directly
Journal Articles Fuel Year : 2004

Preserved lignin structures in Miocene-aged lignite lithotypes, Bulgaria.

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Abstract

Contents of preserved lignin structures in Miocene-aged lignite lithotypes were determined. Phenol aldehydes, ketones and acids released from lignin by CuO oxidative hydrolysis were separated by capillary zone electrophoresis (CZE). Products of degradation were separated and identified by GC–MS to confirm CZE data and to complement composition data. The following values for the contents of preserved lignin structures in lignite lithotypes were determined (in wt%): xylain, 8.5; humovitrain, 6.7; liptain, 6.4; and humoclarain, 3.3. Some fatty acids, negligible contents of benzene polycarboxylic acids and their hydroxy/methoxy counterparts were also observed using GC–MS.
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Dates and versions

hal-00069184 , version 1 (16-05-2006)

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Maya Stefanova, O. Maman, Bernard Guillet, Jean-Robert Disnar. Preserved lignin structures in Miocene-aged lignite lithotypes, Bulgaria.. Fuel, 2004, 83, pp.123-128. ⟨10.1016/S0016-2361(03)00037-1⟩. ⟨hal-00069184⟩
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