A packed-bed tower is used for absorption of sulfur dioxide (SO 2 ) from an air stream
Question:
A packed-bed tower is used for absorption of sulfur dioxide (SO2) from an air stream using water as the solvent. At one point in the tower, the composition of SO2 is 10% (by volume) in the gas phase, and 0.30 wt% in the liquid phase, which has a mass density 61.8 Ibm/ft3. The tower is isothermal at 3 0°C, and the total system pressure is 1.0 atm. The convective mass-transfer coefficients are kL = 2.5 lbmole/ft2 · h · (lbmole/ft3) for the liquid film, and kG = 0.125 lbmole/ft2 · h· atm for the gas film. Equilibrium distribution data for the SO2-water-air system are provided in Problem 29.1.
a. Plot out the equilibrium line in units of pA (atm) vs. cAL (lbmole/ft3). Plot out the operating point (pA, cAL) on the same graph. Determine p*A and c*AL and plot on the same graph.
b. Determine the gas—liquid interface compositions pA.i and cAL,i*,
c. Estimate KG and KL, Ky and Kx at the operating point, and the molar flux NA.
d. Determine the % resistance in the gas phase at the operating point.
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Step by Step Answer:
Fundamentals Of Momentum Heat And Mass Transfer
ISBN: 9781118947463
6th Edition
Authors: James Welty, Gregory L. Rorrer, David G. Foster