Research On Photocatalytic Reactor Of Fluidized-bed-optical-fibers And Its Applications For Rmoval Of Benzene Series

In this study, in order to overcome low efficiency of mass transfer and light irradiationand uneven light distribution of conventional reactors, designed the photocatalytic reactor offluidized-bed-optical-fibers, used TCE as removal object studied the performance of thereactor. And studied its applications for removal of benzene series. The study mainlyincludes:（1） The performance tests of photocatalytic reactor of fluidized-bed-optical-fibers:I used TCE as the target pollutant, studied the impact of water vapor content, oxygencontent, light source intensity, TCE initial concentration on reactor’s performance. Theresults showed that: Appropriate amount of water vapor concentration is conductive tothe performance of the reactor. There was no significant change on TCE degradationeffect while the oxygen content was at the range of10.4%～50%. When increased thelight source intensity, removal efficiency of TCE and catalyst activity increased, but thephoton quantum efficiencies didn’t change significantly. TCE removal efficiencydecreased with the initial concentration increased, photon quantum efficiencies andturnover frequency increased and then decreased. On the condition of100%light intensity,water vapor content of0.25%, oxygen content of20.8%, TCE initial concentration of303.32ppm, the photon quantum efficiency was as high as15.54%, turnover frequency was7.33μmol/（gTiO₂·min）, and removal efficiency was85.78%. Compared with the flat platefluidized bed photocatalytic reactor, fluidized-bed-optical-fibers photocatalytic reactorshowed considerable advantage on photon quantum efficiencies and turnover frequencies.（2） Application for removal of benzene series on the photocatalytic reactor offluidized-bed-optical-fibers: Reseached the removal of toluene, m-xylene and benzene.Studied the effect of water vaper content, oxygen content, light source intensity andpollutant initial concentration on removal of benzene series. The results showed thatappropriate amount of water vapor concentration and oxygen content were favorable fordegradation of benzene series. When changed the light intensity, the better degradationeffects the stronger light source intensity. Removal efficiency decreased with increasingthe initial concentration of benzene series.（3） Photocatalytic reactor of fluidized-bed-opertical-fibers improvement andperformance measurement: Improved the reactor by using alumium jaket, and evaluedthe performance of degradation of TCE and studied the photocatalytic decompositionof benzene series. The resuls showed that, the performance of the reactor increasedsignificantly. The improved reactor represented better performance for benzene series. Removal efficiencies were increased to27.02%,20.33%,9.67%respectively for toluene,m-xylene and benzene.