A thin plastic membrane is used to separate helium from a gas stream. Under steady state, the concentration of helium in the membrane is 0.02 and 0.005 kmol/m3 at the inner and outer surfaces, respectively. If the membrane thickness is 1 mm and the binary diffusion coefficient of helium with respect to the plastic is 10-9 m2/s, what is the diffusive molar flux? Assume one-dimensional transport.
A thin plastic membrane is used to separate helium from a gas stream. Under steady state, the concentration of helium in the membrane is 0.02 and 0.005 kmol/m3 at the inner and outer surfaces, respectively. If the membrane thickness is 1 mm and the binary diffusion coefficient of helium with respect to the plastic is 10-9 m2/s, what is the diffusive molar flux? Assume one-dimensional transport.
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 thin plastic membrane is used to separate helium from a gas stream. Under steady state, the concentration of helium in the membrane is 0.02 and 0.005 kmol/m3 at the inner and outer surfaces, respectively. If the membrane thickness is 1 mm and the binary diffusion coefficient of helium with respect to the plastic is 10-9 m2/s, what is the diffusive molar flux? Assume one-dimensional transport.
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