Palladium Catalysts Based on Porous Aromatic Frameworks for Vanillin Hydrogenation: Tuning the Activity and Selectivity by Introducing of Functional Groups

Abstract

Lignin is one of the most important types of carbon raw materials, which can be used for production of both fuel components and valuable chemical products. The composition of lignin valorization depends on the properties of the catalyst used. The aim of current work was to study the activity of palladium catalysts based on porous aromatic frameworks (PAF) in vanillin hydrogenation and to develop the methods for controlling their activity and selectivity by modifying the PAF structure with various functional groups. Three palladium catalysts were synthesized based on non-modified PAF-30, its sulphated derivative PAF-30-SO3H and modified with CH2N+(C2H5)3 groups PAF-30-TEA, and tested in HDO of lignin components. This investigation provides one of the potential routs for the development of efficient catalysts for hydrodeoxygenation by adjustment the properties and composition of the catalyst.

Keywords: hydrodeoxygenation, porous aromatic frameworks, biorefining, palladium catalysts