A Compact Pulse Corona Plasma System with Photocatalyst for an Air Conditioner

광촉매와 조합된 코로나 방전 플라즈마 필터의 유해 가스 및 입자 제거 특성

  • 신수연 (경북대 대학원 전기공학과) ;
  • 문재덕 (경북대 전자전기공학부)
  • Published : 2007.01.01


A compact discharge plasma system with a photocatalyst has been proposed and investigated experimentally for application to air conditioners. It was found that there was intense ultra violet radiation with high energy of 3.2 eV from the corona discharge due to the DC-biased pulse voltage applied on a wire. An electrophotochemical reaction took place apparently on the surfaces of the photocatalyst of $TiO_2$ irradiated ultra violet front the discharge plasma in the proposed plasma system. The proposed discharge plasma system with the photocatalyst of $TiO_2$ showed very high removal efficiency of VOCs by tile additional electrophotochemical reactions on the photocatalyst. The proposed discharge plasma system also showed very high removal efficiency of particles such as smokes, suspended bacteria, and pollen and mite allergens by the electrostatic precipitation part. This type of corona discharge plasma system with a photocatalyst can be used as an effective means of removing both indoor pollutant gases and particles including suspended allergens.


  1. N, Goodman and J. F. Hughes, The effect of discharge on dust mite and cat allergens, J. Electrostat, 60 (2004) 69-91 https://doi.org/10.1016/j.elstat.2003.11.005
  2. T. Oda, Non-thermal plasma processing for environmental protection; decomposition of dilute VOCs in air, J. Electrostat, 57 (2003) 293-311 https://doi.org/10.1016/S0304-3886(02)00179-1
  3. U. Kogelschatz, Ozone generation and dust collection in electrical discharge for environmental purposes:Fundamentals and Applications, edited by E. M. van Veldhuizen, Nova Science Publishers, 11743 (2000)
  4. NATO Advanced Research Workshop on Non-thermal Plasma Techniques for Pollution Control, Cambridge University, England UK (Sept 21-25, 1992) 1-8
  5. G. Sathiamoorthy, et al, Chemical reaction kinetics and reactor modeling of NOx removal in a pulsed streamer corona discharge reactor, Ind. Eng. Chern., Res. 38 (5) (1999) 1944-1855
  6. W. Niessen, et al, The influence of ethane on the conversion of NOx in a dielectric barrier discharge, J.Phy., D: Appl. Phys, 31 (1998) 542-550 https://doi.org/10.1088/0022-3727/31/5/011
  7. T. Oda, et al, Decomposition of gaseous organic contaminants by surface discharge induced plasma chemical processing- SPCP, IEEE IA. 32, 1 (1996) 118-123 https://doi.org/10.1109/28.485822
  8. T. Yamamoto, Decomposition of Toluene, o-Xylene, Trichloroethylene, and Their Mixture Using a BaTi03 PackedBed Plasma Reactor, J. Adv. Oxid. Technol., 1, 1 (1996) 67-78
  9. K. Suzuki, Photocatalytic air purification on Ti02 coated honeycomb support, Photocatalytic Purification and Treatment of Water and Air (1993) 421-434
  10. C. D. Jaeger, A. J. Bard, Spin trapping and electron spin resonance detection of radical intermidiates in the photodecomposition of water at $TiO_{2}$ particulate system, J. Phys, Chern., 83, 24 (1979) 3145-3151