By
Dr.Azhar-Ul-Haq
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Feed flow rate, composition, temperature,
pressure and phase
Desired degree of component separation
Operating pressure (Must be below critical
pressure of the mixture)
Pressure drop particularly for vacuum
operation
Reflux ratio
Number of equilibrium stages or stage
efficiency or HETP
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Type of condenser (total, partial or mixed)
Degrees of liquid reflux subcooling
Type of reboiler (partial or total)
Type of trays or packing
Column height
Feed entry stage
Column diameter
Column internal and materials of construction
Chemical reactivity of feed components
Corrosion and material of construction
Toxicity and flammability
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Reflux, Reflux Ratio, Min Reflux Ratio
Min. no. of stages
Light key (LK), heavy key (HK)
Boilup Rate, Boilup Ratio
Relative Volatility
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By Raults’s Law
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