Changes in the chemical structure of low rank coal after low temperature oxidation or demineralization by acid treatment: Analysis by FT-i.r. and u.v. fluorescence

The studies have been conducted on low rank coal: Flambant de Provence, France, PRV=0.44 FTIR and UV synchronous fluorescence spectroscopy are used to study structural changes in low rank coal after natural oxidation or acid (HCl/HF) demineralization. The observed variations deal mainly with a decrease in aliphatic structures and an increase in the oxygenated species. A quantitative oxidation study of the effect of temperature, time, mineral matter and oxygen concentrations has been conducted by FTIR. An attempt to describe the oxygenated species by FTIR and to compare their evolution has been conducted. Various oxidation mechanisms are proposed according to the results.

Changes in the chemical structure of low rank coal after low temperature oxidation or demineralisation by acid treatment: Analysis by FTIR and UV fluorescence

Ultraviolet-fluorescence alteration of hydrocarbon fluid inclusions

Organic inclusions in salt. Part I: Solid and liquid organic matter, carbon dioxide and nitrogen species in fluid inclusions from the Bresse basin (France)

Identification of polycyclic aromatic hydrocarbons (PAHs) in suspended particulate matter by synchronous fluorescence spectroscopic technique

Spectroscopie de fluorescence UV: technique d'excitation émission synchrones. Applications à l'étude de composés fossiles

Resultats d'application de cette technique a l'analyse de la partie minerale et de la partie organique d'un charbon de Gardanne

Application de la spectroscopie infrarouge à transformée de Fourier à l'analyse de charbons

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Spectroscopie de fluorescence UV: technique d'excitation émission synchrones. Applications à l'étude de composés fossiles

Application de la spectroscopie infrarouge à transformée de Fourier à l'analyse de charbons