QUESTION 1 SOLVE USING EXCEL, SHOW ALL FORMULAS USED IN CALCULATION
A tower packed with 25 mm Plastic NORPAC Ring is used to absorb benzene vapor from air by
contacting the gas stream with wash oil at 300 K and 1 atm. The entering gas flows at 8.23 Kmol/h
and contain 4.3% Benzene. Ninety two percent of benzene is to be removed from air. The
entering oil flow rate is 660 kg/h. The viscosity of the oil is 2.0 cP and its density is 840 kg/m$^3$. The
viscosity of the gas can be taken as 1.81$\times$10$^{-5}$ kg/ (m-s). D$_G$= 7.30$\times$10$^{-6}$ m$^2$/s, D$_L$=0.04 $\times$ 10$^{-8}$m$^2$/s
A. Estimate the loading and flooding superficial gas velocities.
B. Calculate the column inside diameter and pressure drop of the gas for operation at 75%
of the flooding superficial gas-velocity.
C. Estimate the gas and liquid volumetric mass-transfer coefficients, k$_G$a$_h$ and k$_L$a$_h$.
