A chemical compound B with molecular weight 85 is absorbed from an airstream into an aqueous solution. The bulk concentrations at one point in the absorption unit may be represented as partial pressure PB,G of 0.1 atm in the air phase and cB,L = 1 kmol/m3 in the aqueous phase. The total pressure in the system is 2.5 atm, and the density of the solution is 1100 kg/m3. The Henry’s law constant is assumed as 0.85 atm/mol fraction B. The overall gas mass transfer coefficient, KG, is determined as 0.17 kmol/m2 h atm. Assume 80% of the mass transfer resistance is in the gas film. (a) Determine the individual mass transfer coefficients, ky and kx. (b) Determine the concentration on the liquid side of the interface, xB,i. (c) Determine the mass flux of B.
A chemical compound B with molecular weight 85 is absorbed from an airstream into an aqueous solution. The bulk concentrations at one point in the absorption unit may be represented as partial pressure PB,G of 0.1 atm in the air phase and cB,L = 1 kmol/m3 in the aqueous phase. The total pressure in the system is 2.5 atm, and the density of the solution is 1100 kg/m3. The Henry’s law constant is assumed as 0.85 atm/mol fraction B. The overall gas mass transfer coefficient, KG, is determined as 0.17 kmol/m2 h atm. Assume 80% of the mass transfer resistance is in the gas film. (a) Determine the individual mass transfer coefficients, ky and kx. (b) Determine the concentration on the liquid side of the interface, xB,i. (c) Determine the mass flux of B.
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
Section: Chapter Questions
Problem 1.1P
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A chemical compound B with molecular weight 85 is absorbed from an airstream into an
aqueous solution. The bulk concentrations at one point in the absorption unit may be
represented as partial pressure PB,G of 0.1 atm in the air phase and cB,L = 1 kmol/m3 in the aqueous
phase. The total pressure in the system is 2.5 atm, and the density of the solution is 1100 kg/m3.
The Henry’s law constant is assumed as 0.85 atm/mol fraction B. The overall gas
coefficient, KG, is determined as 0.17 kmol/m2 h atm. Assume 80% of the mass transfer resistance
is in the gas film.
(a) Determine the individual mass transfer coefficients, ky and kx.
(b) Determine the concentration on the liquid side of the interface, xB,i.
(c) Determine the mass flux of B.
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