Absorption

A combustion gas (22 kmol) from a large coal-fired power plants contains carbon

dioxide 11.5 + a+f-d =

_CO₂ (mol %) the rest is air. We want to remove

a+f-d

CO₂ (mol %).

80

50

"

the CO₂ so that the cleaned gas contains 1.1+

This is done by contacting the combustion gas with a water-amine solution

in a plate absorption column at about 60°C and 1.2 bar. The water-amine

feed solution contains 1.0% CO₂ and the enriched solution leaving the bottom

contain 5.32+3=

% CO₂ The vapor liquid equilibrium relation is

given by, y = 0.84x. Assume constant molar flows calculate the liquid flow rate

and required number of plates.

103

=

=