Related Questions

In a continuous distillation column, the optimum reflux ratio ranges from __________ times the minimum reflux ratio.
A 1.1 to 1.5
B 1.6 to 2
C 2.2 to 2.6
D 2.7 to 3
What is the reflux ratio at total reflux?
A Zero
B Infinity
C Unity
D Data insufficient
The feed to fractionating column is changed from saturated vapour to saturated liquid. If the separation and reflux ratio remains unchanged, the number of ideal stages will
A Increase
B Decrease
C Remains same
D Depend on saturated boiling point; may increase or decrease
Minimum reflux ratio in a distillation column results in
A Optimum no. of trays
B Minimum reboiler size
C Maximum condenser size
D Minimum number of trays
As the reflux ratio in a distillation coloumn is increased from the minimum, the
A Slope of the operating line in stripping section decreases
B Number of plates decreases very slowly first and then more and more rapidly
C Total cost first decreases and then increases
D Liquid flow increases while the vapor flow decreases for a system
When a multistage tray tower uses a minimum reflux ratio, it implies
A Infinite trays and maximum reboiler heat load
B Infinite trays and minimum reboiler heat load
C Minimum trays and minimum reboiler heat load
D Minimum trays and maximum reboiler heat load
For water-ethanol system, the minimum reflux ratio
A Is computed from the slope of the upper operating line that is tangent to the equilibrium curve
B Is computed from the intercept of the operating line
C Cannot be computed
D Is the optimum reflux ratio
At what value of reflux ratio, number of theoretical plates in a distillation column is minimum?
A 0
B 1
C ∞
The fixed cost of a distillation column at minimum reflux ratio is
A Minimum
B Infinite
C Optimum
D None of these
The operating cost of a distillation column at minimum reflux ratio is
A Minimum
B Maximum
C Infinite
D Zero

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