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Étude de l'oxydation de composés insaturés en tube à onde de choc

Abstract : The optimization of functioning of spark ignited engines and the reformulation of automobile fuels (gasolines or Diesel fuels) in order to decrease the quantities of pollutants emitted require a fundamental approach built on predictive kinetic mechanisms based on the writing of elementary reactions. Nevertheless, if the primary mechanism of the oxidation of alkanes is now well understood, the reactions of unsaturated and aromatic compounds are not yet well defined. An experimental work has been performed using a shock tube ans has allowed us to study the the global oxidation reactions of 1-butyne, 2-butyne, I-butene and otho-, para et meta-xylenes at high temperatures (> 1100 K) and high pressure (> 6 bar). Detailed kinetic mechanisms have been developped and validated by comparing experimental and computed ignition delays. In the conditions of this study, the three xylenes show the same reactivity. This results agrees qualitatively with the measurement of similar values for the rate constants of the unimolecular decompositions giving hydrogen atoms and methylbenzyl radicals, since these reactions are very important for auto-ignition delays.
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  • HAL Id : tel-01750297, version 1



Najib Belmekki. Étude de l'oxydation de composés insaturés en tube à onde de choc. Alimentation et Nutrition. Institut National Polytechnique de Lorraine, 2001. Français. ⟨NNT : 2001INPL048N⟩. ⟨tel-01750297⟩



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