Application of the Minka and Myers theory of liquid adsorption to systems with two liquid phases

C. Wegmann, P.J.A.M. Kerkhof

    Research output: Contribution to journalArticleAcademicpeer-review

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    Abstract

    Dissolved acrylonitrile can be separated from a water stream by adsorption onto a polymeric sorbent (Dowex Optipore L-493) in a fixed bed and desorbed again by flushing the column with acetone. When the acetone fraction in the ternary mixture acrylonitrile/acetone/water is low and the acrylonitrile fraction is high, a phase separation between a water rich and an acrylonitrile rich phase occurs. In order to find the operating parameters for this separation process, the adsorbed amounts for all possible compositions of the bulk mixture need to be known. By use of a thermodynamic model, the loading in the ternary system was predicted from the three binary isotherms acrylonitrile/water, acrylonitrile/acetone, and acetone/water. These isotherms were determined experimentally. From the binary isotherms, the activity coefficients in the adsorbed phase were estimated. The binary model for the adsorbed phase activity coefficients was then extended to a ternary model. From this ternary activity coefficient model, the composition of the adsorbed phase was calculated as a function of the liquid phase composition. The agreement between the calculated adsorbed phase composition and the experimentally determined adsorbed phase composition is good to fair.
    Original languageEnglish
    Pages (from-to)7340-7348
    Number of pages9
    JournalIndustrial and Engineering Chemistry Research
    Volume51
    Issue number21
    DOIs
    Publication statusPublished - 2012

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    Acrylonitrile
    Acetone
    Activity coefficients
    Adsorption
    Phase composition
    Liquids
    Isotherms
    Water
    Ternary systems
    Sorbents
    Chemical analysis
    Phase separation
    Thermodynamics

    Cite this

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    title = "Application of the Minka and Myers theory of liquid adsorption to systems with two liquid phases",
    abstract = "Dissolved acrylonitrile can be separated from a water stream by adsorption onto a polymeric sorbent (Dowex Optipore L-493) in a fixed bed and desorbed again by flushing the column with acetone. When the acetone fraction in the ternary mixture acrylonitrile/acetone/water is low and the acrylonitrile fraction is high, a phase separation between a water rich and an acrylonitrile rich phase occurs. In order to find the operating parameters for this separation process, the adsorbed amounts for all possible compositions of the bulk mixture need to be known. By use of a thermodynamic model, the loading in the ternary system was predicted from the three binary isotherms acrylonitrile/water, acrylonitrile/acetone, and acetone/water. These isotherms were determined experimentally. From the binary isotherms, the activity coefficients in the adsorbed phase were estimated. The binary model for the adsorbed phase activity coefficients was then extended to a ternary model. From this ternary activity coefficient model, the composition of the adsorbed phase was calculated as a function of the liquid phase composition. The agreement between the calculated adsorbed phase composition and the experimentally determined adsorbed phase composition is good to fair.",
    author = "C. Wegmann and P.J.A.M. Kerkhof",
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    doi = "10.1021/ie300273x",
    language = "English",
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    pages = "7340--7348",
    journal = "Industrial and Engineering Chemistry Research",
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    publisher = "American Chemical Society",
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    Application of the Minka and Myers theory of liquid adsorption to systems with two liquid phases. / Wegmann, C.; Kerkhof, P.J.A.M.

    In: Industrial and Engineering Chemistry Research, Vol. 51, No. 21, 2012, p. 7340-7348.

    Research output: Contribution to journalArticleAcademicpeer-review

    TY - JOUR

    T1 - Application of the Minka and Myers theory of liquid adsorption to systems with two liquid phases

    AU - Wegmann, C.

    AU - Kerkhof, P.J.A.M.

    PY - 2012

    Y1 - 2012

    N2 - Dissolved acrylonitrile can be separated from a water stream by adsorption onto a polymeric sorbent (Dowex Optipore L-493) in a fixed bed and desorbed again by flushing the column with acetone. When the acetone fraction in the ternary mixture acrylonitrile/acetone/water is low and the acrylonitrile fraction is high, a phase separation between a water rich and an acrylonitrile rich phase occurs. In order to find the operating parameters for this separation process, the adsorbed amounts for all possible compositions of the bulk mixture need to be known. By use of a thermodynamic model, the loading in the ternary system was predicted from the three binary isotherms acrylonitrile/water, acrylonitrile/acetone, and acetone/water. These isotherms were determined experimentally. From the binary isotherms, the activity coefficients in the adsorbed phase were estimated. The binary model for the adsorbed phase activity coefficients was then extended to a ternary model. From this ternary activity coefficient model, the composition of the adsorbed phase was calculated as a function of the liquid phase composition. The agreement between the calculated adsorbed phase composition and the experimentally determined adsorbed phase composition is good to fair.

    AB - Dissolved acrylonitrile can be separated from a water stream by adsorption onto a polymeric sorbent (Dowex Optipore L-493) in a fixed bed and desorbed again by flushing the column with acetone. When the acetone fraction in the ternary mixture acrylonitrile/acetone/water is low and the acrylonitrile fraction is high, a phase separation between a water rich and an acrylonitrile rich phase occurs. In order to find the operating parameters for this separation process, the adsorbed amounts for all possible compositions of the bulk mixture need to be known. By use of a thermodynamic model, the loading in the ternary system was predicted from the three binary isotherms acrylonitrile/water, acrylonitrile/acetone, and acetone/water. These isotherms were determined experimentally. From the binary isotherms, the activity coefficients in the adsorbed phase were estimated. The binary model for the adsorbed phase activity coefficients was then extended to a ternary model. From this ternary activity coefficient model, the composition of the adsorbed phase was calculated as a function of the liquid phase composition. The agreement between the calculated adsorbed phase composition and the experimentally determined adsorbed phase composition is good to fair.

    U2 - 10.1021/ie300273x

    DO - 10.1021/ie300273x

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    JO - Industrial and Engineering Chemistry Research

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