DETERMINATION OF EFFECTIVE INTERFACIAL-AR EAS BY ABSORPTION OF CARBON-DIOXIDE FROM AIR

Absorption of carbon dioxide from atmosphere has been investigated in a packed column with a height of 2 meters and solutions of KOH/K2CO3 o r NaOH/Na2CO3 as scrubbing liquid. This system characterised by very l ow energy and mass transfer rates can be described excellently by the HTU-NTU model. The maximum deviation of the effective interfacial area thus determined on the base of various measured absorption rates at c onstant temperature and hydrodynamics and varying liquid composition i s less than 10%. These results show that the absorption of carbon diox ide from air can be applied as standard test system for column packing s.