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

Kaituo Liu; Xiaoming Huang; Evgeny A. Pidko; Emiel J.M. Hensen

doi:10.1002/cctc.201701329

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

Kaituo Liu, Xiaoming Huang, Evgeny A. Pidko^*, Emiel J.M. Hensen

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

22 Citations (Scopus)

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, 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 % 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.

Original language	English
Pages (from-to)	810-817
Journal	ChemCatChem
Volume	10
Issue number	4
DOIs	https://doi.org/10.1002/cctc.201701329
Publication status	Published - 2018
Externally published	Yes

Keywords

alcohols
carboxylic acids
hydrogenation
ruthenium
supported catalysts

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title = "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, 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 % 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.",

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AU - Huang, Xiaoming

AU - Pidko, Evgeny A.

AU - Hensen, Emiel J.M.

PY - 2018

Y1 - 2018

N2 - 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 % 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.

AB - 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 % 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.

KW - alcohols

KW - carboxylic acids

KW - hydrogenation

KW - ruthenium

KW - supported catalysts

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

Abstract

Keywords

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