An evaluation of the efficiency of odorant removal by sodium ferrate(VI) oxidation

Abstract

Gas odorization of organosulfur is common used to detect a leakage of natural gas at city gate station. An effective method for solving breathing problem caused by smell of organosulfur needs to be understood. This study used the response surface methodology (RSM) based on central composite design (CCD) approach to deal with the design and analysis of the experiments. Effects of the reaction time range of 10–50 min, initial Na2FeO4 concentration range of 12.5–62.5 g/L, temperature range of 10–50 °C and pH range of 2–10 on the efficiency of odorant removal by Na2FeO4 oxidation were investigated to evaluate an applicability of the model. The results showed that using 50 g/L of Na2FeO4 concentration can remove 95% of the mixture organosulfur compounds with its concentration of 0.6 g/L over a reaction period of 40 min at pH 4 and 20 °C. The use of quadratic regression from RSM could be useful to predict the removal efficiency of odorant by Na2FeO4 oxidation. Optimizing the operating conditions of Na2FeO4 oxidation by CCD approach could be a promising method with possible applications in the removal of sulfur compounds from the remaining odorant in small containers. The findings of this study may contribute to an effective method of deodorizing organosulfur compounds in the natural gas containers.