Hydrodeoxygenation of Lignin-Based Compounds over Ruthenium Catalysts Based on Sulfonated Porous Aromatic Frameworks

Abstract

Bifunctional catalysts are a major type of heterogeneous catalytic systems that have been widely investigated for biomass upgrading. In this work, Ru-catalysts based on sulfonated porous aromatic frameworks (PAFs) were used in the hydrodeoxygenation (HDO) of lignin-derived compounds: guaiacol, veratrole, and catechol. The relationship between the activity of metal nanoparticles and the content of acid sites in synthesized catalysts was studied. Herein, their synergy was demonstrated in the Ru-PAF-30-SO3H/5-COD catalyst. The results revealed that this catalytic system promoted partial hydrogenation of lignin-based compounds to ketones without any further transformations. The design of the Ru-PAF-30-SO3H/5-COD catalytic system opens a promising route to the selective conversion of lignin model compounds to cyclohexanone.

Recent Progress on Conversion of Lignocellulosic Biomass by MOF-Immobilized Enzyme

“…2 The reusability of immobilized cellulase is utilized in the process of saccharification with 25% [Emim]DEP. 3 The reusability of immobilized β-glucosidase is utilized in the hydrolysis of cellobiose in ionic liquid.…”

“…The main basic units of lignin are p-hydroxyphenyl (H), guaiacyl (G), and syringyl (S). Lignocellulosic biomass chemical structures and compositions are varied based on the species of plants [3].…”