Related Experiment Video
Updated: Jan 8, 2026

Tuning the Acidity of Pt/ CNTs Catalysts for Hydrodeoxygenation of Diphenyl Ether
Published on: August 17, 2019
Influence of Zeolite Support Topology on Ru Catalyst Performance in Hydrodeoxygenation of Biomass-Derived Guaiacol
Yirou Xu1, Qingyan Cui1, Gan Feng1
1National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou 350002, China.
Abstract:
To investigate the influence of the topological structure of zeolite supports on the selectivity of hydrodeoxygenation of guaiacol to cyclohexanol, four various zeolites, β, ITQ-1, S-1, and MCM-41, were synthesized for the preparation of Ru-supported catalysts. Microporous and mesoporous structures were observed in the dealuminated β, ITQ-1, and S-1 zeolites, with the dealuminated β zeolite exhibiting a larger surface area and the ITQ-1 and S-1 zeolites showing a larger external surface area. MCM-41 zeolite possessed only a mesoporous structure and displayed the largest surface area. The Ru/S-1 and Ru/MCM-41 catalysts had higher Ru4+ content and lower Ru0 content compared to Ru/β and Ru/ITQ-1 catalysts. Moreover, the particle sizes of Ru on Ru/β, Ru/ITQ-1, and Ru/S-1 catalysts were similar and smaller than those on Ru/MCM-41 catalyst. Selective hydrodeoxygenation results revealed that the Ru/S-1 and Ru/MCM-41 catalysts achieved the highest guaiacol conversion after prolonged reaction time, although the Ru/β catalyst exhibited higher intrinsic hydrodeoxygenation activity. The Ru/S-1 catalyst exhibited the highest selectivity toward cyclohexanol among all of the catalysts. Considering both guaiacol conversion and cyclohexanol selectivity, the Ru/S-1 catalyst displayed superior selectivity hydrodeoxygenation activity of guaiacol to cyclohexanol, this is attributed to its suitable topological structure, higher Ru4+ content, and larger external surface area, which collectively facilitated the selective adsorption and promoted the hydrodeoxygenation reaction.
Related Concept Videos
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
Reduction of Alkenes: Catalytic Hydrogenation
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
Catalysis
Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation
Regioselectivity and Stereochemistry of Hydroboration
Hydroboration proceeds in a concerted fashion with the attack of borane on the π bond, giving a cyclic four-centered transition state. The –BH2 group is bonded to the less substituted carbon and –H to the more substituted carbon. The concerted nature requires the simultaneous addition of –H and –BH2 across the same face of the alkene giving syn stereochemistry.
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

