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Fundamentals of Momentum, Heat, and Mass Transfer 5th Edition James R. Welty, Charles E. Wicks, Robert E. Wilson Gregory L. Rorrer John Wiley
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Convective Mass Transfer Between Phases 29.10 At a particular location in a countercurrent absorber used to remove solute A from a gas stream, the mole fraction of the transferring species A in the bulk gas stream is 0.035 and the mole fraction of solute A in the bulk liquid phase is 0.01. The total system pressure is 2.0 atm and the temperature is 300 K. If 60% of the resistance is in the gas phase. a. Determine the interfacial compositions, X a,i and y a,i. The gas–liquid equilibrium relationship is linear, as given by y A = 0.3 x A. b. If ky = 1.25 g mole/m 2 s (mole fraction), calculate the overall coefficient, Ky for the gas phase at the operating point of the process. c. Calculate the overall coefficient Kx for the liquid phase at the operating point of the process.
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DATOS LIQUIDO GAS GAS LIQUIDO T= 300 K P = 2atm Xa =0.01 Ya =0.035 60% resistencia en el líquido Ya=0.3xa
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1/ky/1/Ky = Ky/ky= 0.6 =ya-yai/ya-ya* Por lo tanto Ya=0.3xa por lo tanto y*a=0.3*0.01=0.003 0.6 = 0.035-yai/0.035-0.003 yai = 0.0158 Por lo tanto Xai =yai/0.3 = 0.0527 a)
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b) Ky=0.6ky = 0.75 gmol/m 2 s(con.)
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