Polar pollutions such as sulfur dioxide are harmful to human life and environment. There are different methods for removal of this material. Recently a new method based on application of Electro Hydro Dynamic (EHD) was proposed. In this thesis an experimental system for assessment of EHD effect on removal/decrease of SO2 from a gas flow was designed and assembled. Experimental results show that efficiency of SO2 removal depends on applied voltage, flow rate of gas, concentration of SO2 in gas flow, and NaOH concentration as chemical absorbent in liquid flow. Applying of EHD enhances transfer rate of SO2 from gas phase to NaOH falling film and consequently increases the system mass transfer coefficient. Results show that efficiency of the system on reduction of SO2 without application of EHD was 40% and the system efficiency by applying 15 KV to the system with SO2 concentration of 520 ppM, gas flow rate of 10 lit/Min, and liquid absorption flow rate of 0.01 M3/Min (Base condition) was measured 74.4%. Under base condition and only by increasing of gas flow rate to 20 lit/Min, the system efficiency was decreased to 62.5%. Experimental results show system efficiency became 82.28% by application of 15 KV to system electrodes and when gas inlet flow rate was 10 lit/Min and its SO2 concentration was 2500 ppM and liquid absorption flow rate of 0.01 M3/Min. Under base condition and only with decrease NaOH concentration in liquid absorption flow to 0.01 N the system efficiency decrease to 54%. Under base condition and only by decreasing of applied voltage to 12 KV, the system efficiency was 68.5%, and by decreasing of the applied voltage to 6 KV, the system efficiency became 50.5%. Key words : SO2, Absorption, EHD, Plasma Reactor, Polar Pollution
