Oxidative conversion of lignin over cobalt-iron mixed oxides prepared via the alginate gelation
2018
Hdidou, L. | Kouisni, L. | Manoun, B. | Hannache, H. | Solhy, A. | Barakat, Abdellatif | Materials Science and Nanoengineering Department ; Université Mohammed VI Polytechnique = Mohammed VI Polytechnic University [Ben Guerir] (UM6P) | Laboratoire d'Ingénierie et Matériaux [Casablanca] (LIMAT) ; Faculté des Sciences Ben M'sik [Casablanca] ; Université Hassan II de Casablanca = University of Hassan II Casablanca = جامعة الحسن الثاني (ar) (UH2C)-Université Hassan II de Casablanca = University of Hassan II Casablanca = جامعة الحسن الثاني (ar) (UH2C) | AgroBioSiences department ; Université Mohammed VI Polytechnique = Mohammed VI Polytechnic University [Ben Guerir] (UM6P) | LS3M ; Université Hassan 1er [Settat] | Université Mohammed VI Polytechnique = Mohammed VI Polytechnic University [Ben Guerir] (UM6P) | Ingénierie des Agro-polymères et Technologies Émergentes (UMR IATE) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Université Montpellier 2 - Sciences et Techniques (UM2)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)
The depolymerization of polymer lignin model to low molecular weight products was studied in water, at 200 °C under 100 MPa of 10% O2 using cobalt-iron mixed oxides as catalysts. These nanostructured oxides with different Co/Fe ratios were prepared via alginate gelation. X-ray diffraction, scanning electron microscope, and size exclusion chromatography were used to study the influence of the Fe/Co ratios on the structure and the proprieties of the oxides as well as the morphology, the structure, and the composition of the obtained degraded products. The results showed that the oxides used in this study were versatile catalysts with a high catalytic activity for lignin depolymerization. Furthermore, these oxides demonstrated high yield and high selectivity towards aromatic compounds.
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