Answered: Adsorption isotherm data ( 100°F) for…

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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Air at a flow rate of 12,000 scfm (60^oF, 1 atm) containing 0.5 mol% ethyl acetate (EA) and no water vapor is to be treated with activated carbon (C) (ρ_b =30 lb/ft³ ) with an equivalent particle diameter of 0.011 ft in a fixed-bed adsorber to remove EA, which will be subsequently stripped from C by steam at 230^oF. Based on the following data, determine the diameter and height of the carbon bed, assuming adsorption at 100^oF and 1 atm and a time to breakthrough of 8 h with a superficial gas velocity of 60 ft/minute. If the bed height-to-diameter ratio is unreasonable, what change in design basis would you suggest?

Adsorption isotherm data ( 100°F) for EA:
pEA, atm
9. lb EAЛЬ С
pEA, atm
9. Ib EAЛЬ С
0.0002
0.125
0.0020
0.227
0.0005
0.164
0.0050
0.270
0.0010
0.195
0.0100
0.304
Breakthrough data at 100°F and 1 atm for EA in air at a gas superfi-
cial velocity of 60 f/minute in a 2-ft dry bed:
Mole Fraction EA
Time,
Mole Fraction EA
Time,
in Effluent
Minutes
in Effluent
Minutes
0.00005
60
0.00100
95
0.00010
66
0.00250
120
0.00025
75
0.00475
160
0.00050
84

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