Hydrodeoxygenation of methyl-substituted ketones using the composite loading of hydrogenation and dehydration catalysts

Abstract

The hydrogenation/hydrodeoxygenation of methyl-substituted carbonyl compounds to preserve the isomeric structure of a product is one way of controlling its amount of oxygen and improving the chemical stability of motor fuel components. The integration of hydrogenation and dehydration catalysts in one reaction space is an bright example of processes that proceed on these catalysts and positively affect each other. In comparison with the hydrogenation Ni-catalyst, the transformation of 2,4-dimethyl-3-pentanone into 2,4-dimethylpentane over the same catalyst loaded jointly with a zeolite is accompanied by a several-fold increase in hydrogenation rate and operational stability. In the process, the complete hydrodeoxygenation of the parent ketone is observed. Such composite loading can be used to replace bifunctional catalysts.