mass transfer behavior at horizontal cylinder in cross flow under different flow conditions

the rate of liquid–solid mass transfer at a horizontal cylinder placed in a cylindrical vertical column under different hydronamic conditions including gas sparging, single phase liquid flow, and two phase (gas–liquid) flow was studied experimentally by using the electrochemical technique which involves measuring the limiting current of the cathodic reduction of k₃fe(cn)₆ using a solution containing 0.01 m k₃fe(cn)₆ and 0.1 m k₄fe(cn)₆ and a large excess of naoh as supporting electrolyte. variables studied were: liquid and gas superficial velocities, cylinder diameter, and solution physical properties.