Condensation of a binary vapour mixture in the presence of an inert gas

https://doi.org/10.1016/0009-2509(77)80123-1Get rights and content

Abstract

The simultaneous heat and mass transfer process during condensation of a binary vapour mixture in the presence of a non-condensable gas is analysed using matrix formulations of the interfacial mass transfer rate relations. A film model for multicomponent mass transfer based on an exact solution to the Maxwell-Stefan equations is used to calculate the mass transfer coefficients in the ternary vapour phase. With the aid of a computational example involving condensation of methanol and water vapours in the presence of air, it is demonstrated that diffusional interactions can significantly affect condensation rates.

References (11)

  • G. Ackermann

    Ver. Deutsch. Ing. Forschungsheft

    (1937)
  • A.P. Colburn et al.

    Trans. Am. Inst. Chem. Engrs.

    (1937)
  • J.T. Schrodt

    A.I.Ch.E. J.

    (1973)
  • H.L. Toor

    A.I.Ch.E. J.

    (1957)
  • J.B. Duncan et al.

    A.I.Ch.E. J.

    (1962)
There are more references available in the full text version of this article.

Cited by (40)

  • Numerical evaluation of phase behavior properties for gas condensate under non-equilibrium conditions

    2018, Fuel
    Citation Excerpt :

    Currently, mass transfer theory is commonly used in the chemical industry. Numerous researchers calculated the mass and energy transfer rate based on film models [25–37]. Among those models, some of them are concentrated on the condenser, which is a widely used instrument in chemical engineering industry.

  • Removal of volatile organic compounds by cryogenic condensation followed by adsorption

    2002, Chemical Engineering Science
    Citation Excerpt :

    However, in a situation with high concentrations of the condensing vapors (>50%) and low concentrations of the inert gas (for example, in a condenser the concentration of air due to the atmospheric leakage may be in trace levels), the diffusional interactions in the vapor phase should be considered in estimating the binary diffusion coefficients and mass transfer rates. This was pointed out in other studies (Krishna & Strandart, 1976; Krishna & Panchal, 1977; Mazzarotta & Sebastiani, 1995). For binary vapors mixture (m=2) in air, there are nine unknowns to be determined; namely: Tg, Ts, TC, V1, V2, pG1, pG2, ps1, and ps2, from as many equations (1–9)( The ordinary differential equations (3–5)(have been solved simultaneously along with the constraints given by Eqs. (1), (2), (6) and (7) with the help of the NAG Fortran Library.

View all citing articles on Scopus
View full text