Coulson Gas Ab Flashcards
1
Q
A wetted-wall column is used for absorbing sulphur dioxide from air by means of a caustic soda
solution. At an air flow of 2 kg/m2s, corresponding to a Reynolds number of 5160, the friction
factor R/ρu2 is 0.0200.
Calculate the mass transfer coefficient in kg SO2/s m2(kN/m2) under these conditions if the tower
is at atmospheric pressure. At the temperature of absorption the following values may be used:
The diffusion coefficient for SO2 = 0.116 × 10−4 m2/s, the viscosity of gas = 0.018 mNs/m2,
and the density of gas stream = 1.154 kg/m3.
A
7.56 × 10−4 kg SO2/m2s(kN/m2)
