All questions must be answered in details and all calculation steps must be shown: 1- In the preparation of cooking liquor for a sulphite pulp mill, an absorption tower is used for absorbing SO in a week liquor. The week liquor enters the tower at a rate of 20 L/s from top with SO concentration of 0.5% by weight and leaves from bottom with SO concentration of 1% by weight. The gas stream entering the bottom of the tower (Flowing in counter current fashion with respect to week liquor) contains 17% by volume SO. When the gas leaves the tower from top, 75% of SO gets absorbed. The pressure in the tower becomes 151.325 KPa and operates isothermally at 308 K (35 C). Assuming that the liquor has a specific gravity of 1.0. Calculate (3 marks) Data: R=8.31451 m. KPa/(kmol. K) a. Molar flow rate of entering gas. b. Volumetric flow rate of entering gas.

All questions must be answered in details and all alculation steps must be shown: 1- In the preparation of cooking liquor for a sulphite pulp mill, an absorption tower is used for absorbing SO2 in a week liquor. The week liquor enters the tower at a rate of 20L/s from top with SO2 concentration of 0.5% by weight and leaves from bottom with SO2 concentration of 1% by weight. The gas stream entering the bottom of the tower (Flowing in counter current fashion with respect to week liquor) contains 17% by volume SO2. When the gas leaves the tower from top, 75% of SO2 gets absorbed. The pressure in the tower becomes 151.325KPa and operates isothermally at 308K(35C). Assuming that the liquor has a specific gravity of 1.0. Calculate ( 3 marks) Data: R=8.31451m3.KPa/(kmol.K) a. Molar flow rate of entering gas. b. Volumetric flow rate of entering gas