Hydroliquéfaction du charbon : méthodes analytiques d'évaluation de l'activité catalytique

Abstract : Development of coal hydroliquefaction processes, in the future, depends on the obtention of efficient catalysts, ensuring high-grade products at lower investment coast. So the evaluation of the catalysts efficiency is an important point. In this outlook, the aim of our work is to carry out analytical protocoles and to select suitable criterions for the characterization of the catalyst's effeiciency according toward a precise quality of hydroliquefaction products. Five criterions based on several analytical procedures, were established. Criterion n° 1 : mass balance from extrography and sonication, gives the conversion yields and classifying the compounds in families according to their solubility in a set of solvents. Criterion n°2 : structural identification and classification of the compounds according to retention index zones obtained by gas chromatography on capillary column (GC/CC), coupled or not with mass spectrometry (GC/MS). Criterion n°3 : classification according to the molecular size using size exclusion chromatography (SEC). Criterion n°4 : fractionnation by high performance liquid chromatography on amino bonded phase in : saturates ; aromatics and polar compounds - evaluation of heteroatomic containing structures. Criterion n°5 qualitative and quantitative evaluation of hydroaromatic structures by charge transfer complexation chromatography. The efficiency of the analytical methods and the quality required for the products will direct the choice among these criterions. The results are discussed in terms of analytical methods efficiency and of correlation between catalysts activity and nature of products
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Moustapha Diack. Hydroliquéfaction du charbon : méthodes analytiques d'évaluation de l'activité catalytique. Autre. Université Paul Verlaine - Metz, 1990. Français. ⟨NNT : 1990METZ008S⟩. ⟨tel-01775857⟩

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