Given a spherical catalyst, having a diameter of d₁ = 15mm is said to be used in a packed bed reactor. The fluid contains Cab 1.25mol of reactant A, flowing at a free stream velocity of u-0.80 m/s. Given the fluid properties: 2.5x10-11 m² Diffusivity DAB Momentum diffusivity v =! 0.78x10-6 m² a) Calculate the mass flux of A at the boundary if the reaction is external mass transfer limiting and proceeds instantaneously. b) What will be the mass flux of A at the boundary given a rate law -TAS = K, CAS; K₁ = 5.0 x10-6 m³ m²s

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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Given a spherical catalyst, having a diameter of dp = 15mm is said to be used in a packed bed reactor. The
1.25mol
fluid contains Cab =
of reactant A, flowing at a free stream velocity of u-0.80 m/s. Given the fluid
L
properties:
2.5x10-11 m²
Diffusivity DAB
=
S
0.78x10-6 m²
Momentum diffusivity v =
a) Calculate the mass flux of A at the boundary if the reaction is external mass transfer limiting and
proceeds instantaneously.
=
b) What will be the mass flux of A at the boundary given a rate law -AS = K₂ CAS; Kr
5.0 x10-6 m³
m²s
Transcribed Image Text:Given a spherical catalyst, having a diameter of dp = 15mm is said to be used in a packed bed reactor. The 1.25mol fluid contains Cab = of reactant A, flowing at a free stream velocity of u-0.80 m/s. Given the fluid L properties: 2.5x10-11 m² Diffusivity DAB = S 0.78x10-6 m² Momentum diffusivity v = a) Calculate the mass flux of A at the boundary if the reaction is external mass transfer limiting and proceeds instantaneously. = b) What will be the mass flux of A at the boundary given a rate law -AS = K₂ CAS; Kr 5.0 x10-6 m³ m²s
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