Q A tray tower is to be designed to absorb SO2 from an air stream by using pure water at 293 K (68°F). The entering gas contains 20 mol % SO2 and that leaving 2 mol % at a total pressure of 101.3 kPa. The inert air flow rate is 150 kg air/h- m2 , and the entering water flow rate is 6000 kg water/h- m. Assuming an overall tray efficiency of 25%, how many theoretical trays and actual trays are needed? Assume that the tower operates at 293 K (20°C). Using Two methods to Calculate the No. of Trays

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