Mass Transfer
Ammonia present in the coke oven gas is removed by washing with

Caustic solution
Ethanolamine
Dilute ammoniacal liquor
Dilute HCl

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Mass Transfer
For absorbing a sparingly soluble gas in a liquid

Mass transfer co-efficient must be kept constant
Liquid side mass transfer co-efficient should be increased
Gas side mass transfer co-efficient should be increased
Liquid side mass transfer co-efficient should be decreased

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