Molecular compounds generated by ruthenium tetroxide oxidation and preparative off line thermochemolysis of lignite humic acids from South Moravia: Implications for molecular structure

被引：23

作者：

Valkova, Dana ^{[1
,2
]}

Grasset, Laurent ^{[1
]}

Ambles, Andre ^{[1
]}

机构：

[1] Univ Poitiers, CNRS, SRSN, UMR 6514, F-86022 Poitiers, France

[2] Brno Univ Technol, Inst Phys & Appl Chem, Fac Chem, Brno 61200, Czech Republic

来源：

FUEL | 2009年 / 88卷 / 11期

关键词：

Ruthenium tetroxide oxidation; Thermochemolysis; Humic acids; Lignite; LOW-RANK COALS; ROTHAMSTED CLASSICAL EXPERIMENTS; CHROMATOGRAPHIC ANALYSIS; GAS-CHROMATOGRAPHY; CARBOXYLIC-ACIDS; ALKALI TREATMENT; ORGANIC-MATTER; METHYL-ESTERS; SOIL; DEGRADATION;

D O I：

10.1016/j.fuel.2009.01.026

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The composition of humic acids (HAs) isolated from a South Moravian lignite deposit was examined via thermochemolysis and RuO4 oxidation. The combination of thermochemolysis with TMAH and TEAAC shows that fatty acids were mostly in a "free" form, tightly trapped within the humic acid organic network. Humic acids contain also trapped hydrocarbons. The relative distributions of these compounds confirm their higher plant origin. RuO4 oxidation resulted in a lipophilic fraction containing mainly fatty acids. The hydrophilic fractions released upon RuO4 oxidation comprised mostly aliphatic C-2-C-9 dicarboxylic acids and hydroxy acids related to short methylene bridges, to bridges between aromatic and/or oxygenated moieties such as aliphatic chains of ligneous units. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：2113 / 2121

页数：9

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