Valorisation of humins-extracted 5-Methoxymethylfurfural: towards high added value furanics via continuous flow catatalytic hydrogenation
Romero, Antonio A.
Physical and chemical processes
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The formation of humins is one drawback of biomass valorization (e.g. hemicellulosic fraction) towards platform chemicals and fuels. Furanic compounds including 5-hydroxymethylfurfural and 5-methoxymethylfurfural can be extracted from humins and valorized. Unlike HMF, reactions with MMF have not been widely studied. In this work, 5-methoxymethylfurfural (MMF) was extracted from humins aiming to its hydrogenation in continuous flow. Based on success from literature studies with HMF hydrogenation, 5% Ru/C and 5% Pd/C catalysts were employed and both have demonstrated excellent conversion of MMF towards hydrogenation products (100%), with an interesting selectivity switch depending on reaction conditions. Ru-based catalyst were more prone to deactivation as compared to Pd catalysts, extremely stable after a few hours on stream under the investigated reaction conditions. A reaction mechanism was proposed for MMF hydrogenation.