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© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Supported gold and platinum particles on titanium oxide catalysts were evaluated in the oxidative depolymerization of lignins toward high added value aromatics under mild conditions (T: 150 °C, Pair: 20 bar, CNaOH: 10 g/L, 1 h). Kraft and ethanol Organosolv lignins were engaged in the study. Gold catalyst showed a strong tendency to further oxidize aromatics produced from lignin depolymerization to volatile compounds leading to very low yield in target molecules. On the contrary, platinum-based catalysts were allowed to observe enhanced yields that were attributed to its ability to preserve lignin’s substructure during the reaction. A kinetic model was constructed based on the results observed, which allowed us to identify the occurrence of condensation reactions during lignin oxidation and degradation of the produced aromatic compounds as the main limitations to reach high product yields. Insights on lignin oxidation and the catalyst’s role lead through this study would help to reach higher control over lignin valorization.

Details

Title
Supported-Metal Catalysts in Upgrading Lignin to Aromatics by Oxidative Depolymerization
Author
Cédric Cabral Almada 1 ; Kazachenko, Aleksandr 2 ; Fongarland, Pascal 3   VIAFID ORCID Logo  ; Denilson Da Silva Perez 4 ; Kuznetsov, Boris N 5 ; Djakovitch, Laurent 1   VIAFID ORCID Logo 

 Institut de Recherches sur la Catalyse et l’Environnement de Lyon (IRCELYON), Université de Lyon, CNRS, IRCELYON, UMR 5256, 2 avenue Albert Einstein, F-69626 Villeurbanne CEDEX, France; [email protected] (C.C.A.); [email protected] (A.K.); [email protected] (P.F.) 
 Institut de Recherches sur la Catalyse et l’Environnement de Lyon (IRCELYON), Université de Lyon, CNRS, IRCELYON, UMR 5256, 2 avenue Albert Einstein, F-69626 Villeurbanne CEDEX, France; [email protected] (C.C.A.); [email protected] (A.K.); [email protected] (P.F.); Institute of Chemistry and Chemical Technology SB RAS, Siberian Federal University, 660041 Krasnoyarsk, Russia; [email protected] 
 Institut de Recherches sur la Catalyse et l’Environnement de Lyon (IRCELYON), Université de Lyon, CNRS, IRCELYON, UMR 5256, 2 avenue Albert Einstein, F-69626 Villeurbanne CEDEX, France; [email protected] (C.C.A.); [email protected] (A.K.); [email protected] (P.F.); Laboratoire de Génie des Procédés Catalytiques, UMR 5285, CNRS, CPE, Université Claude Bernard Lyon 1, 43, bd du 11 Novembre 1918, B.P. 82077, 69616 Villeurbanne CEDEX, France 
 Institut Technologique FCBA-InTechFibres, Domaine Universitaire, CS 90251, 38044 Grenoble CEDEX 9, France; [email protected] 
 Institute of Chemistry and Chemical Technology SB RAS, Siberian Federal University, 660041 Krasnoyarsk, Russia; [email protected]; Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, 660036 Krasnoyarsk, Russia 
First page
467
Publication year
2021
Publication date
2021
Publisher
MDPI AG
e-ISSN
20734344
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2528304257
Copyright
© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.