Kinetics of aqueous-phase hydrogenation of lactic acid to propylene glycol

    Research output: Research - peer-reviewArticle

    • 39 Citations

    Abstract

    The kinetics of aqueous-phase hydrogenation of lactic acid to propylene glycol over a 5 wt % Ru/carbon catalyst have been characterized in a stirred batch reactor. A thorough analysis of mass-transfer resistances based on measurements of hydrogen solubility and gas - liquid mass-transfer coefficients, application of correlations in the literature, and intraparticle diffusion calculations show that mass-transfer resistances are negligible at the temperatures (403-423 K) and hydrogen pressures (6.8-13.6 MPa) studied. A Langmuir - Hinshelwood (L - H)model is proposed and used to fit lactic acid conversion kinetics. The kinetic model provides insight into the catalytic reaction mechanism and forms the basis for design and further investigation of the aqueous-phase hydrogenation.

    LanguageEnglish (US)
    Pages691-696
    Number of pages6
    JournalIndustrial and Engineering Chemistry Research
    Volume41
    Issue number4
    StatePublished - Feb 20 2002

    Profile

    Lactic acid
    Glycols
    Hydrogenation
    Propylene
    Mass transfer
    Kinetics
    Propylene Glycol
    Lactic Acid
    mass transfer
    kinetics
    acid
    Hydrogen
    hydrogen
    Batch reactors
    Solubility
    Catalysts
    Carbon
    Liquids
    Gases
    Temperature

    ASJC Scopus subject areas

    • Polymers and Plastics
    • Environmental Science(all)
    • Chemical Engineering (miscellaneous)

    Cite this

    Kinetics of aqueous-phase hydrogenation of lactic acid to propylene glycol. / Zhang, Zhigang; Jackson, James E.; Miller, Dennis J.

    In: Industrial and Engineering Chemistry Research, Vol. 41, No. 4, 20.02.2002, p. 691-696.

    Research output: Research - peer-reviewArticle

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    abstract = "The kinetics of aqueous-phase hydrogenation of lactic acid to propylene glycol over a 5 wt % Ru/carbon catalyst have been characterized in a stirred batch reactor. A thorough analysis of mass-transfer resistances based on measurements of hydrogen solubility and gas - liquid mass-transfer coefficients, application of correlations in the literature, and intraparticle diffusion calculations show that mass-transfer resistances are negligible at the temperatures (403-423 K) and hydrogen pressures (6.8-13.6 MPa) studied. A Langmuir - Hinshelwood (L - H)model is proposed and used to fit lactic acid conversion kinetics. The kinetic model provides insight into the catalytic reaction mechanism and forms the basis for design and further investigation of the aqueous-phase hydrogenation.",
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