الفهرس 
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Abstract
The present work aims to investigate the mass transport behavior of a gas sparged rotating cylinder reactor using the electrochemical technique to develop a new reactor suitable for managing water and air pollution beside conducting catalytic liquid-solid-gas reactions. Variables studied were: i. Rotational speed of the cylinder. ii. Solution’s Physical properties. iii. Superficial gas velocity.iv. Concentration of surfactant (sodium lauryl sulfate). In the single-phase reaction, the mass transport coefficient increases with raising the cylinder rotational speed, as the Schmidt number of the solution increases the mass transport coefficient increases. In the two-phase reaction (gas-liquid), the mass transport coefficient increases with increasing both the rotational speed of the cylinder and superficial gas velocity. The addition of sodium lauryl sulfate surfactant with a concentration ranging from 5 ppm to 25 ppm reduced the mass transport coefficient by a percentage ranged from 2.7% to 30%. In the present study two empirical correlations were obtained as follow: i. For single-phase conditions: Sh = 0.2775 Sc0.33 Re0.628 with an average deviation of ± 3%. ii. For two-phase conditions: Sh = 6.3146 Sc0.33 Re0.21 Reg 0.222 with an average deviation of ± 7.2%