Hydrogen Sulfide has to be removed from a light refinery hydrocarbon stream before the gas is subject to further processing. The feed gas contains 4.0 mole% H₂S, and 98% of which has to be removed by absorption with a weak aqueous basic solution in a packed column. The feed gas rate is 80 kmol/h, and the entering solution has negligible amount of H₂S. The concentration of H₂S in the absorbent solution leaving the column is 0.015 mole H₂S per mole of the H₂S-free liquid. The equilibrium relation is linear and is given by y = 1.95 x. The 1.0 m diameter column operates at 25°C and 101.3 kPa total pressure. If the overall gas-phase film coefficient is Kya = 130 kmol/m³.h.Ay, calculate - (a) the molar flowrate of entering liquid solution, L (b) the number of transfer units, NOG (c) the packed height, CT

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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Hydrogen Sulfide has to be removed from a light refinery hydrocarbon stream before
the gas is subject to further processing. The feed gas contains 4.0 mole% H₂S, and
98% of which has to be removed by absorption with a weak aqueous basic solution
in a packed column. The feed gas rate is 80 kmol/h, and the entering solution has
negligible amount of H₂S.
The concentration of H₂S in the absorbent solution leaving the column is 0.015 mole
H₂S per mole of the H₂S-free liquid. The equilibrium relation is linear and is given by
y = 1.95 x. The 1.0 m diameter column operates at 25°C and 101.3 kPa total pressure.
If the overall gas-phase film coefficient is Kya = 130 kmol/m³.h.Ay, calculate -
(a) the molar flowrate of entering liquid solution, L
(b) the number of transfer units, NOG
(c) the packed height, CT
Transcribed Image Text:Hydrogen Sulfide has to be removed from a light refinery hydrocarbon stream before the gas is subject to further processing. The feed gas contains 4.0 mole% H₂S, and 98% of which has to be removed by absorption with a weak aqueous basic solution in a packed column. The feed gas rate is 80 kmol/h, and the entering solution has negligible amount of H₂S. The concentration of H₂S in the absorbent solution leaving the column is 0.015 mole H₂S per mole of the H₂S-free liquid. The equilibrium relation is linear and is given by y = 1.95 x. The 1.0 m diameter column operates at 25°C and 101.3 kPa total pressure. If the overall gas-phase film coefficient is Kya = 130 kmol/m³.h.Ay, calculate - (a) the molar flowrate of entering liquid solution, L (b) the number of transfer units, NOG (c) the packed height, CT
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