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Hydrogenation of Lactic Acid to 1,2-Propanediol over Ru-Based Catalysts.

ABSTRACT: The catalytic hydrogenation of lactic acid to 1,2-propanediol with supported Ru catalysts in water was investigated. The influence of catalyst support (activated carbon, ?-Al₂O₃, SiO₂, TiO₂, and CeO₂) and promoters (Pd, Au, Mo, Re, Sn) on the catalytic performance was evaluated. Catalytic tests revealed that TiO₂ yields the best Ru catalysts. With a monometallic Ru/TiO₂ catalyst, a 1,2-propanediol yield of 70?% at 79?% lactic acid conversion was achieved at 130?°C after 20?h reaction. Minor byproducts of the hydrogenation reaction were propionic acid, ethanol, 1-propanol, and 2-propanol. For the bimetallic catalysts, the addition of Pd and Au slightly enhanced the performance of Ru/TiO₂, whereas the addition of common hydrogenation promoters such as Re, Mo, and Sn impaired the activity.

SUBMITTER: Liu K

PROVIDER: S-EPMC5838540 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature

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Hydrogenation of Lactic Acid to 1,2-Propanediol over Ru-Based Catalysts.

Liu Kaituo K Huang Xiaoming X Pidko Evgeny A EA Hensen Emiel J M EJM

ChemCatChem 20180115 4

The catalytic hydrogenation of lactic acid to 1,2-propanediol with supported Ru catalysts in water was investigated. The influence of catalyst support (activated carbon, γ-Al2O3, SiO2, TiO2, and CeO2) and promoters (Pd, Au, Mo, Re, Sn) on the catalytic performance was evaluated. Catalytic tests revealed that TiO2 yields the best Ru catalysts. With a monometallic Ru/TiO2 catalyst, a 1,2-propanediol yield of 70 % at 79 % ...[more]

PMID: 29541255

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