Wastewater at 600 gpm, containing 10 ppm (by weight) of benzene,is to be stripped with air in a packed column operating at 25oC and 2 atm to produce water containing 0.005 ppm of benzene. The packing is 2-inch polypropylene Flexirings. The vapor pressure of benzene at 25oC is 95.2 torr. The solubility of benzene in water at 25oC is 0.180 g/ 100 g. At these conditions, for benzene:kLα =0:067s-1 and kGα=0:80 s-1Determine the: (a) minimum air-stripping rate in scfm. (b) stripping factor based on the air rate suggested by the expert; (c) number of transfer units, NOG; (d) overall mass-transfer coefficient, KGα, in units of mol/m3-s-kPa and s-1 and which phase controls mass transfer; and (e) volume of packing in m3.
Wastewater at 600 gpm, containing 10 ppm (by weight) of benzene,is to be stripped with air in a packed column operating at 25oC and 2 atm to produce water containing 0.005 ppm of benzene. The packing is 2-inch polypropylene Flexirings. The vapor pressure of benzene at 25oC is 95.2 torr. The solubility of benzene in water at 25oC is 0.180 g/ 100 g. At these conditions, for benzene:kLα =0:067s-1 and kGα=0:80 s-1Determine the: (a) minimum air-stripping rate in scfm. (b) stripping factor based on the air rate suggested by the expert; (c) number of transfer units, NOG; (d) overall mass-transfer coefficient, KGα, in units of mol/m3-s-kPa and s-1 and which phase controls mass transfer; and (e) volume of packing in m3.
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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Wastewater at 600 gpm, containing 10 ppm (by weight) of benzene,is to be stripped with air in a packed column operating at 25oC and 2 atm to produce water containing 0.005 ppm of benzene. The packing is 2-inch polypropylene Flexirings. The vapor pressure of benzene at 25oC is 95.2 torr. The solubility of benzene in water at 25oC is 0.180 g/ 100 g. At these conditions, for benzene:
kLα =0:067s-1 and kGα=0:80 s-1
Determine the: (a) minimum air-stripping rate in scfm. (b) stripping factor based on the air rate suggested by the expert; (c) number of transfer units, NOG; (d) overall mass-transfer coefficient, KGα, in units of mol/m3-s-kPa and s-1 and which phase controls
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