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KMID : 1024520040130090767
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Journal of the Environmental Sciences
2004 Volume.13 No. 9 p.767 ~ p.777
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Photocatalytic Destruction of Chlorinated and Aromatic Hydrocarbons for Low-Level Indoor Air Cleaning
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Jo Wan-Kuen
Kwon Ki-Dong
Choi Sang-June
Song Dong-Ik
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Abstract
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This study evaluated the technical feasibility of the application of photocatalysis for the removal of volatile hydrocarbons(VHC) at low ppb concentrations commonly associated with non-occupational indoor air quality issues. A series of experiments was conducted to evaluate five parameters (relative humidity (RH), hydraulic diameter (HD), feeding type (FT) of VHC, photocatalytic oxidation (PCO) reactor material (RM), and inlet port size (IPS) of PCO reactor) for the PCO destruction efficiencies of the selected target VHC. None of the target VHC presented significant dependence on the RH, which are inconsistent with a certain previous study that reported that under conditions of low humidity and a ppm toluene inlet level, there was a drop in the PCO efficiency with decreasing humidity. However, it is noted that the four parameters (HD, RM, FT and IPS) should be considered for better VHC removal efficiencies for the application of photocatalytic technology for cleansing non-occupational indoor air. The PCO destruction of VHC at concentrations associated with non-occupational indoor air quality issues can be up to nearly 100%. The amount of CO generated during PCO were a negligible addition to the indoor CO levels. These abilities can make the PCO reactor an important tool in the effort to improve non-occupational indoor air quality.
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KEYWORD
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Indoor air quality, Parameter, Photocatalytic oxidation, Removal efficiency, Volatile hydrocarbon
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