TiO2 광촉매 공정을 이용한 황화수소 제거

Abstract

This study is to investigate the removal efficiency and removal characteristics of Hydrogen sulfide(H2S) and the influence of Ozone(O3) using TiO2 photocatalytic process. H2S is dominant in sewage, excretions and waste treatment facilities. It is an extremely flammable, highly toxic substance that causes death or acute/chronic disorder when inhaled, and promotes crown corrosion. Considering these damages, removal of H2S is one of the important tasks in the atmospheric environment and water resources industry. TiO2 photocatalystic process in the Advanced Oxidation Process(AOPs) is considered to be a process capable of overcoming the limitations of the existing technology due to its high oxidizing power, thermal and chemical stability, and economic efficiency. However, there is a lack of research on the influence of operating factors to optimize the TiO2 photocatalytic process. Therefore, the influence of the operating factors during photooxidation and the effect of O3 were analyzed assuming an appropriate statistical model. In the experiment, TiO2 photocatalyst(Anatase: 80%, Rutile: 20%) coated reactor and 185, 352 ㎚ UV(Ultraviolet) lamp were used. The atmospheric conditions were 22.0 ± 1.0℃, 1 atm, and relative humidity 48%. The operating parameters were H2S Injection concentration(ppm), UV Irradiation density(W/L) and Reaction time(sec). The results show that the H2S Removal efficiency increases as the H2S Injection concentration(ppm) decrease and the UV Irradiation density(W/L) and Reaction time(sec) increase. It also shows that O3 influences and correlations are great in the process. This process can be applied to sewage, wastewater, excretions treatment facilities or similar facilities.