Question: Separation principles A MDEA-solvent mixture is used to absorb SO2 from a flue gas using a counter-current plate tower at atmospheric pressure and 25C. The

Separation principles A MDEA-solvent mixture is used to absorb SO2 from

Separation principles

A MDEA-solvent mixture is used to absorb SO2 from a flue gas using a counter-current plate tower at atmospheric pressure and 25C. The SO2 inlet concentration of 0.05 kmol per kmol of flue gas is absorbed by the MDEA solvent such that it exits the plate tower 10 times less than the initial concentration. The MDEA-solvent mixture enters the top of the plate tower at 0.0175kmol/m2.s and exits at the bottom of the tower containing 0.012SO2 per kmol of organic solvent. The material data sheet (MSDS) of the solvent used showed no amount of SO2 on the inlet stream. The absorption equilibrium at 25C is given by the relation YSO2=2.741XSO2 and KGa=0.033 kmol/m3s. Determine the following: ii i) The flow rate of the inlet flue gas stream. (5) ii) By using a graphical method, the number of transfer units required. iii) The height of the plate tower required for the separation

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