One-step SO2 removal from the simulated flue gas on platinum anode in acidic solution

Abstract

In this study, removal Of SO2 absorbed into sulfuric acid solution from simulated flue gases was studied on Pt expanded mesh anode as three dimensional packed bed electrode in a batch mode. The conversion of the gaseous impurity can be considered as the main performance criterion. The effects of the parameters such as current density, gas flow rate, and initial SO2 concentration were determined. The energy consumptions of the system were also evaluated. An increase in current density yields an increase in the removal Of SO2. The removal efficiency Of SO2 was decreased with increasing gas flow rate and initial SO2 concentration. High removal efficiency of 100% which meets the regulations requirement was achieved. The results of this investigation have shown that the absorption of the SO2 into the electrolyte and electrochemical oxidation of the SO2 on expanded mesh Pt anode in sulfuric acid can be performed in one step.