UV 광산화 공정 및 광촉매 공정을 이용한 벤젠 및 톨루엔 가스의 처리 = Removal of Benzene and Toluene gas by UV Photo oxidation and Photocatalytic Oxidation

다국어 초록 (Multilingual Abstract)

Volatile organic compounds (VOCs) are widely used in both industrial and domestic activities. This extensive use results in adverse effect in aquatic, soil and atmospheric environments. Conventional methods for treating VOCs from gas streams, such as absorption, adsorption, condensation and thermal /catalytic incineration all have their inherent limitations and none are definitely cost-effective to treat emissions from the small workplace such as architectural coating, printing, and dry cleaning.
In this study, photooxidation-photocatalytic oxidation process was applied in the decomposition of VOCs and benzene and toluene, typical VOCs in industrial area, which were adapted as experimental gases.
In photooxidation process, the decomposition efficiency of benzene and toluene was evaluated by varying different conditions, such as UV output, flowrate and background gas. The results showed that the decomposition efficiency of benzene and toluene increased considerably with increasing UV output and retention time. In case of background gas, the decomposition efficiency in standard air was higher than that in nitrogen.
In photooxidation-photocatalytic oxidation process, the decomposition efficiency was higher than that in photooxidation process and the concentration of ozone generated from photooxidation reactor was drastically decreased after photocatalytic oxidation process.
From this study, the results indicate that photooxidation-photocatalytic oxidation process is ideal for treatment of benzene and toluene from the small workplace. But further process optimization must be achieved to apply this process in workplace.