Characterizing lactic acid hydrogenolysis rates in laboratory trickle bed reactors

    Research output: Contribution to journalArticle

    • 3 Citations

    Abstract

    Representative reaction kinetics are difficult to obtain in multiphase laboratory trickle bed reactors, particularly when the gaseous reactant is rate-limiting, because of mass transport resistances and reactor hydrodynamics in the trickle bed regime. The ruthenium-catalyzed hydrogenolysis of lactic acid to propylene glycol has been examined in trickle bed and batch reactors to better understand the influence of mass transfer and partial wetting and to identify operating conditions where intrinsic kinetic rates can be obtained. At high liquid flow rates and low conversions in the trickle bed reactor, propylene glycol formation rates agree well with intrinsic rates obtained in a stirred batch reactor, with rate independent of feed flow rate or bed configuration in the trickle bed reactor. Application of a mass transport model to the trickle bed reactor at lower flow rates allows rates to be predicted outside the intrinsic kinetic regime. These results provide guidance for proper operation of laboratory trickle bed reactors and make it possible to predict performance in a trickle-bed reactor based on experiments conducted in bench-scale batch reactors.

    Original languageEnglish (US)
    Pages (from-to)5440-5447
    Number of pages8
    JournalIndustrial and Engineering Chemistry Research
    Volume50
    Issue number9
    DOIs
    StatePublished - May 4 2011

    Profile

    Batch reactors
    Mass transfer
    Flow rate
    Feline Panleukopenia
    Acromion
    Calcium Pyrophosphate
    5-Hydroxytryptophan
    Lactic Acid
    Hydrogenolysis
    Lactic acid
    Glycols
    Propylene
    Kinetics
    Pharmacy Legislation
    Propylene Glycol
    Ruthenium
    Reaction kinetics
    Wetting
    Hydrodynamics
    Liquids

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Chemistry(all)
    • Industrial and Manufacturing Engineering

    Cite this

    Characterizing lactic acid hydrogenolysis rates in laboratory trickle bed reactors. / Xi, Yaoyan; Jackson, James E.; Miller, Dennis J.

    In: Industrial and Engineering Chemistry Research, Vol. 50, No. 9, 04.05.2011, p. 5440-5447.

    Research output: Contribution to journalArticle

    Xi, Yaoyan; Jackson, James E.; Miller, Dennis J. / Characterizing lactic acid hydrogenolysis rates in laboratory trickle bed reactors.

    In: Industrial and Engineering Chemistry Research, Vol. 50, No. 9, 04.05.2011, p. 5440-5447.

    Research output: Contribution to journalArticle

    @article{99cc4cdd38614616abd06265e465b0b2,
    title = "Characterizing lactic acid hydrogenolysis rates in laboratory trickle bed reactors",
    abstract = "Representative reaction kinetics are difficult to obtain in multiphase laboratory trickle bed reactors, particularly when the gaseous reactant is rate-limiting, because of mass transport resistances and reactor hydrodynamics in the trickle bed regime. The ruthenium-catalyzed hydrogenolysis of lactic acid to propylene glycol has been examined in trickle bed and batch reactors to better understand the influence of mass transfer and partial wetting and to identify operating conditions where intrinsic kinetic rates can be obtained. At high liquid flow rates and low conversions in the trickle bed reactor, propylene glycol formation rates agree well with intrinsic rates obtained in a stirred batch reactor, with rate independent of feed flow rate or bed configuration in the trickle bed reactor. Application of a mass transport model to the trickle bed reactor at lower flow rates allows rates to be predicted outside the intrinsic kinetic regime. These results provide guidance for proper operation of laboratory trickle bed reactors and make it possible to predict performance in a trickle-bed reactor based on experiments conducted in bench-scale batch reactors.",
    author = "Yaoyan Xi and Jackson, {James E.} and Miller, {Dennis J.}",
    year = "2011",
    month = "5",
    doi = "10.1021/ie1023194",
    volume = "50",
    pages = "5440--5447",
    journal = "Industrial & Engineering Chemistry Product Research and Development",
    issn = "0888-5885",
    publisher = "American Chemical Society",
    number = "9",

    }

    TY - JOUR

    T1 - Characterizing lactic acid hydrogenolysis rates in laboratory trickle bed reactors

    AU - Xi,Yaoyan

    AU - Jackson,James E.

    AU - Miller,Dennis J.

    PY - 2011/5/4

    Y1 - 2011/5/4

    N2 - Representative reaction kinetics are difficult to obtain in multiphase laboratory trickle bed reactors, particularly when the gaseous reactant is rate-limiting, because of mass transport resistances and reactor hydrodynamics in the trickle bed regime. The ruthenium-catalyzed hydrogenolysis of lactic acid to propylene glycol has been examined in trickle bed and batch reactors to better understand the influence of mass transfer and partial wetting and to identify operating conditions where intrinsic kinetic rates can be obtained. At high liquid flow rates and low conversions in the trickle bed reactor, propylene glycol formation rates agree well with intrinsic rates obtained in a stirred batch reactor, with rate independent of feed flow rate or bed configuration in the trickle bed reactor. Application of a mass transport model to the trickle bed reactor at lower flow rates allows rates to be predicted outside the intrinsic kinetic regime. These results provide guidance for proper operation of laboratory trickle bed reactors and make it possible to predict performance in a trickle-bed reactor based on experiments conducted in bench-scale batch reactors.

    AB - Representative reaction kinetics are difficult to obtain in multiphase laboratory trickle bed reactors, particularly when the gaseous reactant is rate-limiting, because of mass transport resistances and reactor hydrodynamics in the trickle bed regime. The ruthenium-catalyzed hydrogenolysis of lactic acid to propylene glycol has been examined in trickle bed and batch reactors to better understand the influence of mass transfer and partial wetting and to identify operating conditions where intrinsic kinetic rates can be obtained. At high liquid flow rates and low conversions in the trickle bed reactor, propylene glycol formation rates agree well with intrinsic rates obtained in a stirred batch reactor, with rate independent of feed flow rate or bed configuration in the trickle bed reactor. Application of a mass transport model to the trickle bed reactor at lower flow rates allows rates to be predicted outside the intrinsic kinetic regime. These results provide guidance for proper operation of laboratory trickle bed reactors and make it possible to predict performance in a trickle-bed reactor based on experiments conducted in bench-scale batch reactors.

    UR - http://www.scopus.com/inward/record.url?scp=79955534345&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=79955534345&partnerID=8YFLogxK

    U2 - 10.1021/ie1023194

    DO - 10.1021/ie1023194

    M3 - Article

    VL - 50

    SP - 5440

    EP - 5447

    JO - Industrial & Engineering Chemistry Product Research and Development

    T2 - Industrial & Engineering Chemistry Product Research and Development

    JF - Industrial & Engineering Chemistry Product Research and Development

    SN - 0888-5885

    IS - 9

    ER -