Determination of the kinetics of ethene epoxidation

E.P.S. Schouten, E.P.S. Schouten, P.C. Borman, P.C. Borman, K.R. Westerterp

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    Abstract

    Several problems and pitfalls in the use of laboratory reactors for the determination of the kinetics of ethene epoxidation over industrial silver on α-alumina catalyst are discussed. Also, commonly used methodologies for kinetic studies are dealt with because of the general nature of some problems. Some advice is given in choosing and using the appropriate reactor type. Further, a method is discussed to determine kinetics in a cooled tubular reactor without having to use heat transport relations. The activation and deactivation of the silver catalyst have been studied in a Berty-type reactor, in a novel internal recycle reactor and in a cooled tubular reactor. It was found necessary to activate the silver catalyst for approximately 170 reaction hours under reaction conditions to obtain a stable and reproducible catalyst activity. Thermal sintering was probably of importance in experiments at the maximum temperature of 543 K. Deliberate addition of small amounts of 1,2-dichloroethane resulted in rapid deactivation of the catalyst. The activity could be restored by addition of small amounts of ethane to the feed. Also, fluorine and silica have been shown to poison the catalyst. Differences in the behaviour of the catalyst in the three reactors may be attributed to the sensitivity of the catalyst towards tiny amounts of poisons present in the reactors and feed mixtures used.
    Original languageUndefined
    Pages (from-to)43-55
    Number of pages13
    JournalChemical engineering and processing : process intensification
    Volume35
    Issue number35
    DOIs
    Publication statusPublished - 1996

    Keywords

    • METIS-105872
    • Kinetic reactors
    • Selective oxidation of ethene
    • Deactivation
    • Activation
    • IR-10856

    Cite this

    Schouten, E. P. S., Schouten, E. P. S., Borman, P. C., Borman, P. C., & Westerterp, K. R. (1996). Determination of the kinetics of ethene epoxidation. Chemical engineering and processing : process intensification, 35(35), 43-55. https://doi.org/10.1016/0255-2701(95)04109-5
    Schouten, E.P.S. ; Schouten, E.P.S. ; Borman, P.C. ; Borman, P.C. ; Westerterp, K.R. / Determination of the kinetics of ethene epoxidation. In: Chemical engineering and processing : process intensification. 1996 ; Vol. 35, No. 35. pp. 43-55.
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    abstract = "Several problems and pitfalls in the use of laboratory reactors for the determination of the kinetics of ethene epoxidation over industrial silver on α-alumina catalyst are discussed. Also, commonly used methodologies for kinetic studies are dealt with because of the general nature of some problems. Some advice is given in choosing and using the appropriate reactor type. Further, a method is discussed to determine kinetics in a cooled tubular reactor without having to use heat transport relations. The activation and deactivation of the silver catalyst have been studied in a Berty-type reactor, in a novel internal recycle reactor and in a cooled tubular reactor. It was found necessary to activate the silver catalyst for approximately 170 reaction hours under reaction conditions to obtain a stable and reproducible catalyst activity. Thermal sintering was probably of importance in experiments at the maximum temperature of 543 K. Deliberate addition of small amounts of 1,2-dichloroethane resulted in rapid deactivation of the catalyst. The activity could be restored by addition of small amounts of ethane to the feed. Also, fluorine and silica have been shown to poison the catalyst. Differences in the behaviour of the catalyst in the three reactors may be attributed to the sensitivity of the catalyst towards tiny amounts of poisons present in the reactors and feed mixtures used.",
    keywords = "METIS-105872, Kinetic reactors, Selective oxidation of ethene, Deactivation, Activation, IR-10856",
    author = "E.P.S. Schouten and E.P.S. Schouten and P.C. Borman and P.C. Borman and K.R. Westerterp",
    year = "1996",
    doi = "10.1016/0255-2701(95)04109-5",
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    Schouten, EPS, Schouten, EPS, Borman, PC, Borman, PC & Westerterp, KR 1996, 'Determination of the kinetics of ethene epoxidation' Chemical engineering and processing : process intensification, vol. 35, no. 35, pp. 43-55. https://doi.org/10.1016/0255-2701(95)04109-5

    Determination of the kinetics of ethene epoxidation. / Schouten, E.P.S.; Schouten, E.P.S.; Borman, P.C.; Borman, P.C.; Westerterp, K.R.

    In: Chemical engineering and processing : process intensification, Vol. 35, No. 35, 1996, p. 43-55.

    Research output: Contribution to journalArticleAcademicpeer-review

    TY - JOUR

    T1 - Determination of the kinetics of ethene epoxidation

    AU - Schouten, E.P.S.

    AU - Schouten, E.P.S.

    AU - Borman, P.C.

    AU - Borman, P.C.

    AU - Westerterp, K.R.

    PY - 1996

    Y1 - 1996

    N2 - Several problems and pitfalls in the use of laboratory reactors for the determination of the kinetics of ethene epoxidation over industrial silver on α-alumina catalyst are discussed. Also, commonly used methodologies for kinetic studies are dealt with because of the general nature of some problems. Some advice is given in choosing and using the appropriate reactor type. Further, a method is discussed to determine kinetics in a cooled tubular reactor without having to use heat transport relations. The activation and deactivation of the silver catalyst have been studied in a Berty-type reactor, in a novel internal recycle reactor and in a cooled tubular reactor. It was found necessary to activate the silver catalyst for approximately 170 reaction hours under reaction conditions to obtain a stable and reproducible catalyst activity. Thermal sintering was probably of importance in experiments at the maximum temperature of 543 K. Deliberate addition of small amounts of 1,2-dichloroethane resulted in rapid deactivation of the catalyst. The activity could be restored by addition of small amounts of ethane to the feed. Also, fluorine and silica have been shown to poison the catalyst. Differences in the behaviour of the catalyst in the three reactors may be attributed to the sensitivity of the catalyst towards tiny amounts of poisons present in the reactors and feed mixtures used.

    AB - Several problems and pitfalls in the use of laboratory reactors for the determination of the kinetics of ethene epoxidation over industrial silver on α-alumina catalyst are discussed. Also, commonly used methodologies for kinetic studies are dealt with because of the general nature of some problems. Some advice is given in choosing and using the appropriate reactor type. Further, a method is discussed to determine kinetics in a cooled tubular reactor without having to use heat transport relations. The activation and deactivation of the silver catalyst have been studied in a Berty-type reactor, in a novel internal recycle reactor and in a cooled tubular reactor. It was found necessary to activate the silver catalyst for approximately 170 reaction hours under reaction conditions to obtain a stable and reproducible catalyst activity. Thermal sintering was probably of importance in experiments at the maximum temperature of 543 K. Deliberate addition of small amounts of 1,2-dichloroethane resulted in rapid deactivation of the catalyst. The activity could be restored by addition of small amounts of ethane to the feed. Also, fluorine and silica have been shown to poison the catalyst. Differences in the behaviour of the catalyst in the three reactors may be attributed to the sensitivity of the catalyst towards tiny amounts of poisons present in the reactors and feed mixtures used.

    KW - METIS-105872

    KW - Kinetic reactors

    KW - Selective oxidation of ethene

    KW - Deactivation

    KW - Activation

    KW - IR-10856

    U2 - 10.1016/0255-2701(95)04109-5

    DO - 10.1016/0255-2701(95)04109-5

    M3 - Article

    VL - 35

    SP - 43

    EP - 55

    JO - Chemical engineering and processing : process intensification

    JF - Chemical engineering and processing : process intensification

    SN - 0255-2701

    IS - 35

    ER -