Question

Marie and James are bubbling dry pure nitrogen (N2) through a tank of liquid water (H2O) containing ethane (C2H6). The vapor stream enters at 25oC, and 14000 mmHg. The tank operates at steady state, and the liquid flow rate enters at 15000 mol/min with a mole fraction of water of 0.999995. The separation of ethane is isothermal and isobaric, and 91% of the ethane is separated into the exiting vapor. Henry's law applies for ethane entering in the liquid and exiting in the vapor. Determine the following three unknowns.
1. Mole fraction of exiting ethane in the vapor phase = Ex: 0.021
2. Flow rate of ethane exiting in the liquid phase = Ex: 15 mol/day
3. Flow rate of entering nitrogen = Ex: 4.3 mol/min

Answer 1

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