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A Study of the Temperature Dependency for Photocatalytic VOC Degradation Chamber Test Under UVLED Irradiations
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  • Journal title : Korean Chemical Engineering Research
  • Volume 53, Issue 6,  2015, pp.755-761
  • Publisher : The Korean Institute of Chemical Engineers
  • DOI : 10.9713/kcer.2015.53.6.755
 Title & Authors
A Study of the Temperature Dependency for Photocatalytic VOC Degradation Chamber Test Under UVLED Irradiations
Moon, Jiyeon; Lee, Kyusang; Kim, Seonmin;
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Photocatalytic VOCs removal test in gas phase is generally performed by placing the light source on the outside due to maintaining a constant temperature inside the test chamber. The distance between light source and photocatalysts is importantin the VOC degradation test since the intensity of light is rapidly decreased as the distance farther. Especially, for the choice of light source as UVLED, this issue is more critical because UVLED light source emits lots of heat and it is hard to measure the exact concentration of VOCs due to changed temperature in the test chamber. In this study, we modified VOC removal test chamber base on the protocol of air cleaner test and evaluated the efficiency of photocatalystunder UVLED irradiation. Photocatalystsof two different samples (commercial and the synthesized vanadium doped ) weretested for the p-xylene degradation in the closed chamber system and compared with each other in order to exclude any experimental uncertainties. During the VOC removal test, VOC concentrations were monitored and corrected at regular time intervals because the temperature in the chamber increases due tothe heat of UVLED. The results showed that theconversion ratio of p-xylene has 40~43% difference before and after the temperature correction. Based on those results, we conclude that the VOC concentration correction must be required for the VOC removal test in a closed chamber system under UVLED light source and obtained the corrected efficiencies of various photocatlysts.
 Cited by
전자빔을 이용 고농도 Xylene의 탄소화 연구 (I),김종범;장성호;손현근;류재용;

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