화학공학소재연구정보센터
Chemical Engineering & Technology, Vol.30, No.8, 1083-1087, 2007
Photocatalytic degradation of benzene in air streams in an optical fiber photoreactor
Photocatalytic decomposition of gaseous benzene at room temperature was studied with a differential-type optical fiber reactor using TiO2 as the photocatalyst. The effects of humidity, UV light intensity and benzene concentration on the performance of the reactor for benzene decomposition were investigated. It was observed that both the apparent quantum yields of benzene decomposition and CO2 production were superior to the traditional photoreactor, especially under limited UV light supply. In addition, deactivation of the TiO2 catalyst heavily relied on the humidity contained in the airflow. Purging with ozone-containing air rapidly decomposed the organic residues adhering to the TiO2 surface and regenerated the deactivated catalyst within 30 minutes.