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Catalytic conversion of lactic acid into propylene glycol over various metals supported on silica

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Abstract

Catalytic hydrogenation of lactic acid to propylene glycol was performed over various metals (Ag, Co, Cu, Ni, Pt, and Ru) supported on silica prepared by an incipient wetness impregnation method. The loading amount of each metal was 5 wt%. Crystallinity of the synthesized catalysts was investigated by X-ray diffraction (XRD), and the BET method was utilized to examine the surface area. Pore volume and pore size of catalysts were determined using BJH analysis of the N2 adsorption isotherm. Particle sizes of various metals were determined from transmission electron microscopy (TEM) images. The catalytic activity was found to be strongly dependent on the supported metal. Among catalysts tested, Ru/SiO2 showed the highest propylene glycol yield. The yield of propylene glycol increased with pressure, and the highest yield was achieved at 130 °C.

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Acknowledgment

This subject is supported by Korea Ministry of Environment as “Converging technology project (202-091-001)”.

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Authors and Affiliations

  1. Department of Chemical Engineering, Inha University, Incheon, Korea

    Tae Young Jang, Ku Bong Chung, Hye Ri Eom, Dong Kyun Noh & Sung-Hyeon Baeck

  2. Department of Chemical and Biological Engineering, Seoul National University, Seoul, Korea

    In Kyu Song & Jongheop Yi

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  1. Tae Young Jang
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  2. Ku Bong Chung
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  3. Hye Ri Eom
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  4. Dong Kyun Noh
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  7. Sung-Hyeon Baeck
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Correspondence to Sung-Hyeon Baeck.

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Jang, T.Y., Chung, K.B., Eom, H.R. et al. Catalytic conversion of lactic acid into propylene glycol over various metals supported on silica. Res Chem Intermed 37, 1275–1282 (2011). https://doi.org/10.1007/s11164-011-0392-x

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  • DOI: https://doi.org/10.1007/s11164-011-0392-x

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