Assignment Task
Task
1. An engineer is designing an absorption system in order to remove sulfur dioxide (602) from wet flue gas rnixture. The wet flue gas mixture stream containing 33 mol% SO2, 7 mol% water vapor and the remaining is gas P, is firstly fed to a dryer and 87% of water vapor is removed from the flue gas mixture in the dryer. The be gas mixture stream exiting from the dryer is then fed to the bottom of an absorption column. A feed solvent solution, containing 90 mol% solvent Y and 10 mol% SO2, is used to absorb only SO2 from the flue gas mixture in the absorption column. The absorption efficiency of the absorption column is 91%. The gas stream exit from the top of the absorption column and the liquid stream exit from the bottom of the absorption column. Given that the molecular weight of the pure solvent Y is 49 g/mol. Assume that evaporation of the solvent Yin the absorption column can be neglected and the solvent solution only absorb SO2 from the flue gas mixture. TABLE Q1 show the flowrate of wet flue gas mixture fed to the dryer and the flowrate of solvent solution fed to the top of the absorption column.
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a. By drawing a cornpletely labeled flowchart .r this system, write down FOUR (4) rnass balance equations for the dryer and write down FIVE (5) mass balance equations for the absorption column.
b. Deterrnine the molar composition for all components in the exit gas stream and the exit liquid stream, respectively.
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