We need to produce a hot “dry air” stream to be used in a spray drying process, and this stream must be no higher than 1% relative humidity at 100 C degrees to be suitable. A humid air stream (10.0...

We need to produce a hot “dry air” stream to be used in a spray drying process, and this stream must be no higher than 1% relative humidity at 100 C degrees to be suitable.

A humid air stream (10.0 mole % water) is fed to a condenser at 90 C degrees and 1.0 atm with a total flow rate of 100 moles per minute. In the condenser, the temperature is lowered to 15.6 C degrees and the pressure is increased to 3.0 atm. Two streams leave the condenser, one of pure liquid water and one of “dried” air. The dried air is fed to a heater (still at 3.0 atm) and heater to 100 C degrees. This process is operated at a steady state.

1. Draw and fully label a process flow diagram for this problem.


2. Assuming the two outlets from the condenser are at vapor-liquid equilibrium, calculate the flow rate of the liquid water stream (mol/min). (Hint: assume vapor leaving condenser behaves ideally).


3. Does the outlet stream from the heater meet the stated requirement?