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Journal of Chemistry
Volume 2014, Article ID 584693, 6 pages
Research Article

Photodegradation of HCFC-22 Using Microwave Discharge Electrodeless Mercury Lamp with TiO2 Photocatalyst Balls

1Department of Environmental System Engineering, Chonnam National University, Yeosu 550-749, Republic of Korea
2School of Environmental Engineering, University of Seoul, Seoul 130-743, Republic of Korea
3Faculty of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 143-747, Republic of Korea
4Department of Environmental Engineering, Sunchon National University, Sunchon 540-742, Republic of Korea

Received 24 November 2013; Revised 26 December 2013; Accepted 9 January 2014; Published 6 March 2014

Academic Editor: Maria Dolores Murcia

Copyright © 2014 Seong-Gyu Seo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The photodegradation of chlorodifluoromethane (HCFC-22) was investigated using microwave/UV/TiO2 photocatalysts hybrid system. The microwave discharge electrodeless mercury lamp (MDEML) used in this study showed mainly atomic Hg emission lines at 253.7 nm. The decomposition efficiency of HCFC-22 increased with decreasing inlet concentration and with increasing reactor residence time. The removal efficiency increased with increasing microwave power on every oxygen concentration. The highest degradation efficiency was obtained when both TiO2 balls and MDEML were used.