Mass Transfer
In case of a desorber (stripper), the

Temperature remains unaffected
Temperature always increases
Operating line always lies above the equilibrium curve
Operating line always lies below the equilibrium curve

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Mass Transfer
A coalescer in a mixer-settler liquid-liquid extraction coloumn

All of these
Comprises of thin bed of substances of extended surface having high porosity
Helps in increasing the bubble size entering the settler
Helps in increasing the settling rate of the bubbles

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