The equilibrium distribution of a solute A between air and water at low concentration at a particular temperature is given as y=1.2 x, where y and x are mole fraction of solute in gas and liquid phase respectively. At a certain point in a mass transfer device, the concentration of solute A in the bulk air is 0.04 mole fraction and that in the bulk aqueous phase is 0.025. In which direction does the transport of solute A occur (from gas to liquid or from liquid to gas)? At the same point, the individual mass transfer coefficients for the transport of A are, ky=7.2 kmol/h m2 (Ay) and kx= 4.6 kmol/h m2 (Ax). Calculate (i) The interfacial concentrations in both the liquid phase and gas phase. (ii) The overall mass transfer coefficients Kx and Ky. (iii) The molar flux NA. (iv) Determine the fraction of total resistance offered by gas phase and liquid phase.

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
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The equilibrium distribution of a solute A between air
and water at low concentration at a
particular temperature is given as y=1.2 x, where y and x
are mole fraction of solute in gas and
liquid phase respectively. At a certain point in a mass
transfer device, the concentration of
solute A in the bulk air is 0.04 mole fraction and that in
the bulk aqueous phase is 0.025. In
which direction does the transport of solute A occur
(from gas to liquid or from liquid to gas)?
At the same point, the individual mass transfer
coefficients for the transport of A are, ky=7.2
kmol/h m2
(Ay) and kx= 4.6 kmol/h m2
(Ax). Calculate
(i) The interfacial concentrations in both the liquid phase
and gas phase.
(ii) The overall mass transfer coefficients Kx and Ky.
(iii) The molar flux NA.
(iv) Determine the fraction of total resistance offered by
gas phase and liquid phase.
Transcribed Image Text:The equilibrium distribution of a solute A between air and water at low concentration at a particular temperature is given as y=1.2 x, where y and x are mole fraction of solute in gas and liquid phase respectively. At a certain point in a mass transfer device, the concentration of solute A in the bulk air is 0.04 mole fraction and that in the bulk aqueous phase is 0.025. In which direction does the transport of solute A occur (from gas to liquid or from liquid to gas)? At the same point, the individual mass transfer coefficients for the transport of A are, ky=7.2 kmol/h m2 (Ay) and kx= 4.6 kmol/h m2 (Ax). Calculate (i) The interfacial concentrations in both the liquid phase and gas phase. (ii) The overall mass transfer coefficients Kx and Ky. (iii) The molar flux NA. (iv) Determine the fraction of total resistance offered by gas phase and liquid phase.
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