Mixed metal oxide catalysts for the production of higher alcohols and esters from renewable resources

Abstract

This doctoral thesis focuses on the development and characterization of heterogeneous catalysts based on mixed metal oxides (Mg–Al, Li–Al) for two types of reactions used in renewable feedstock valorization, which are the Guerbet reaction and transesterification. The research investigates the relationship between the composition, structure, and catalytic performance of the synthesized materials. Several preparation methods (co-precipitation, urea synthesis, impregnation) and characterization techniques (ICP-MS, XRD, SEM, FTIR, N2-physisorption, H2-TPR, CO2-TPD, and NH3-TPD) were applied. The results show that doping mixed oxides with transition metals (Cu, Co) significantly affects their redox and acid-base properties, enhancing their activity and selectivity in catalytic reactions. This thesis contributes to the development of sustainable technologies for converting bioethanol and waste oils into highervalue products.