Assigned: 5/9 Due: 5/15 (Monday Midnight). Problem 1. Ethyl aicohol in a CO2-rich vapor stream is recovered by absorption with water in a sieve-tray tower. Assuming isothermal, isobaric conditions and that only alcohol is absorbed. Entering gas is 180kmol/h;95%CO2,5% ethyl alcohol; 30C,110kPa. Entering liquid absorbent is 100% water: 30C,110kPa. Required recovery (absorption) of ethyl alcohol is 80%. Vapor pressure of CO2 at 30C is 11kPa. Assume idea gas and liquid cases. Water flow is 1.5Lmin [Equilibrium Stage-Based Approach] This absorption power is packed with 1.5-inch metal pall rings. 1.1. Determine the liquid flow. 1.2. Determine the number of equilibrium stages (Nt) required for countercurrent flow of liquid and gas. 1.3. Determine the height of absorption tower. [Mass Transfer-Based Approach] Packing materials provide 3ft2 cross-sectional area (S). A gas phase film mass transport resistant 1.4. Determine Hog. 1.5. Determine NoG. 1.6. Determine the height of absorption tower. 1.7. Discuss the relationship between NOG and N1