A cleaner application on hydrogen sulfide

Abstract

With the increasing industrial production, there was a significant number of toxic and harmful hydrogen sulfide (H2S) gas generated. Due to the industrial activities, converting H2S gas from the waste of industrial process is environmentally attractive. This paper focuses on the conversion of H2S to elemental sulfur (S°) and other sulfur species (i.e., sulfite ion (SO3 2-); sulfate ion (SO4 2-) using Fenton reagent. The effects of some reaction parameters such as Fe 2+ ion concentration, amount of hydrogen peroxide (H2O2), reaction time, initial H2S concentration and, liquid-gas ratio on H2S conversion percentage were explored thoroughly. The results revealed that the increase of the Fe 2+ ion concentration and H2O2 quantity could promote the conversion of H2S. Besides, the comparable results were recorded for each reaction parameter. An apparent positive effect was observed with increasing the amount of H2O2 on H2S conversion. However, the conversion percentage was decreased while increased in the initial concentration of the H2S in the Fenton reactor. It was well accepted that the main conversion pathway of H2S was hydroxyl radical (•OH). Additionally, the oxidative reaction of H2O2 on H2S is thought another removal pathway. The expected products are sulphuric acid and S°.