Multicomponent diffusion and vapor-liquid equilibria of dilute organic components in aqueous sugar solutions

Authors

  • S. K. Chandrasekaran,

    1. Department of Chemical Engineering, University of California, Berkeley, California 94720
    Current affiliation:
    1. Pharmetrics, Inc., 2631 Hanover Street, Palo Alto, California 94306
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  • C. Judson King

    Corresponding author
    1. Department of Chemical Engineering, University of California, Berkeley, California 94720
    • Department of Chemical Engineering, University of California, Berkeley, California 94720
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Abstract

A technique for direct measurement of the differential diffusion coefficients in a ternary system of water, sugar, and a dilute organic species is described. The individual sugars were d-fructose, d-glucose, and sucrose; and ethyl alcohol, ethyl acetate, n-butyl acetate, and n-hexanal individually constituted the dilute organic species. The four ternary diffusivities were obtained over a range of sugar concentrations by the use of horizontal diaphragm cells, a differential interferometer, a flame-ionization gas-liquid chromatograph and postulation of the validity of the Onsager reciprocal relations. The equilibrium partial pressures of the dilute organic species over these solutions have also been measured, using a vapor head space chromatographic technique.

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