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Etude expérimentale et modélisation de l’impact des biocarburants sur le fonctionnement des filtres à particules

Abstract : In order to respect the European standards concerning exhaust gas pollutant emissions, heavy-duty frucks are now equipped with a complex post-freatment line whose durability have to be proven over 700 000 Because of the possible rarefaction of fossil fuels and of the increase of atmospheric pollution, the use of alternative fuel becomes necessary. In comparison to classic diesel fuel, biodiesel contains inorganic elements. Even though their presence is limited, they can interact with the post-freatment line catalysts and thus compromise their behavior in case of massive biodiesel use. The impact of biodiesel on particulate filter (DPF) operation was investigated. The study concerning the impact of K, Na and P on impregnated model diesel soot reactivity has shown that K and Na have a beneficial effect on both C-N02 and C-02 reactions. P has an inhibiting effect on C-02 but a sfrong catalytic impact on C-N02 reaction in presence of water. The analysis of real diesel soot has shown that biodiesel leads to less soot but which are more reactive. K- and P-doping of biodiesel has shown that these inorganic elements are directly reffieved in soot composition and significantly modify their reactivity. The study of soot oxidation in presence of a catalyst which is representative of a comrnercial DPF has shown that the stronger is the soot-catalyst contact, the sfronger is the catalyst efficiency. The presence of inorganic elements enhances the contact and thus the catalyst efficiency.
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Submitted on : Tuesday, February 18, 2020 - 3:05:20 PM
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Julie Schobing. Etude expérimentale et modélisation de l’impact des biocarburants sur le fonctionnement des filtres à particules. Ingénierie de l'environnement. Université de Haute Alsace - Mulhouse, 2018. Français. ⟨NNT : 2018MULH1439⟩. ⟨tel-02483238⟩

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