The exit gas from an alcohol fermenter consists of an

The exit gas from an alcohol fermenter consists of an air-C02 mixture containing 10 mol% C02 that is to be absorbed in a 5.0-N solution of triethanolamine, containing 0.04 mol of carbon dioxide per mole of amine solution. If the column operates isothermally at 25oC, if the exit liquid contains 78.4% of the C02 in the feed gas to the absorber, and if absorption is carried out in a six-theoretical-plate column, calculate:
(a) Moles of amine solution required per mole of feed gas.
(b) Exit gas composition.

Equilibrium Data 0.032 0.05 0.12 0.008 0.023 0.003 0.043 0.015 0.04 0.06 0.02 0.03 0.083 0.01 0.055 0.07 0.068 0.099 0.1
Y = moles C02/mole air; X = moles C02/mole aminesolution

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