Determination stages of tower Example 2 - A bubble - cap absorption column is to be used to absorb ammonia, NH, by using water. - A gaseous mixture containing 15 mol% NH, and 85 mol% air enters the bottom of the absorption tower. 57 mol of gaseous NH, enters the tower per hour, while 3.7 kg of pure water enters the top of the tower per hour. The column operates at the atmospheric pressure and at a constant temperature of 30C. It is desired to absorb NH, such as only 2.5% NH, leaves the tower with air. Determine the number of theoretical plates required for the above process. Equilibrium data is given as in Example 1. Assume that the effect of water vapor in the gases is negligible. Determination stages of tower Example 2 - A bubble - cap absorption column is to be used to absorb ammonia, NH, by using water. - A gaseous mixture containing 15 mol% NH, and 85 mol% air enters the bottom of the absorption tower. 57 mol of gaseous NH, enters the tower per hour, while 3.7 kg of pure water enters the top of the tower per hour. The column operates at the atmospheric pressure and at a constant temperature of 30C. It is desired to absorb NH, such as only 2.5% NH, leaves the tower with air. Determine the number of theoretical plates required for the above process. Equilibrium data is given as in Example 1. Assume that the effect of water vapor in the gases is negligible