Experimental Study On The Removal Of Harmful Gases By An Electrochemical Reactor

The removal of H₂S and styrene were studied by an electrochemical reactor. The electrochemical reactor consists of 5 pairs of stacked RuO₂/Ti electrodes. The distance between two neighboring electrodes is 50 mm. Simulated H₂S gas came from the mixture of standard H₂S gas(1850ppm H₂S in N₂ gas) mixed with N₂ gas, while styrene is blew by the N₂ gas then mixed with N₂ gas. The influences of operation parameters such as current consistency and gas resident time on the removal of H₂S and styrene were examined. It was found that H₂S and styrene were effectively degraded in the reactor. The removal was much higher using three-dimensional electrode reactor with active carbon than using two-dimensional one. It was found that the removal of H₂S and styrene increased with the increase of the current density and gas resident time, but decreased with the increase of initial gas concentration. About 70% H₂S was removed with the operation condition of current density 0.14A/cm² and gas flow rate 2000mL/min. It was found that the major final products were sulfur and SO₄^2-. About 90% styrene was removed with the operation condition of current consistency 0.14A/cm² and gas flow rate 2000mL/min. It was found that the major final products were benzoic acid, CO₂ and water.