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Conversion catalytique des vapeurs de pyrolyse et molécules modèles

Abstract : Fast pyrolysis of biomass yields bio-oils with high levels of oxygen-containing components, high acidity and low stability. Further upgrading of these oils is necessary before they can be used as liquid fuels. Several low-cost strategies have been proposed for reducing the oxygen and acid contents including the catalytic conversion of pyrolytic vapors before vapor condensation. In this context, a first step in this work was the study of model molecules conversion, acetic acid and guaiacol, on different acid catalyst to understand reaction mechanisms and determine the best catalyst. In a second time, a semi-continuous pyrolysis test combined with a catalytic reactor was built and use to test the best acid catalysts found on model molecules, for the conversion of beech wood chips. A product recovery protocol was implanted to recover all the gas, liquid and solid fractions. Those fractions were characterized in depth by various techniques (?-GC, GC×GC, GPC, RMN…). A special focus was made on the quantification of monomers in the bio-oils by GC×GC. Mass balance reached 90% and carbon balance were established for some experiments. The performed characterizations as well as the comparison between catalytic and thermal experiments allowed to get more insights in the role of the catalyst on pyrolytic vapors conversion
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Submitted on : Friday, March 2, 2018 - 1:07:22 AM
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  • HAL Id : tel-01721326, version 1


Alexandre Margeriat. Conversion catalytique des vapeurs de pyrolyse et molécules modèles. Catalyse. Université de Lyon, 2017. Français. ⟨NNT : 2017LYSE1340⟩. ⟨tel-01721326⟩



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