Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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Comparison of Temperature and Light Intensity Effects on the Photooxidation of Toluene-NOx-Air Mixture

온도와 광도가 톨루엔-NOx-공기 혼합물의 광산화 반응에 미치는 영향의 비교

  • Ju, Ok-Jung (School of Earth and Environmental Science, Seoul National University) ;
  • Bae, Gwi-Nam (Center for Environmental Technology Research, Korea Institute of Science and technology) ;
  • Choi, Ji-Eun (School of Earth and Environmental Science, Seoul National University) ;
  • Lee, Seung-Bok (Center for Environmental Technology Research, Korea Institute of Science and technology) ;
  • Ghim, Young-Sung (Department of Environmental Science, Hankuk University of Foreign Studies) ;
  • Moon, Kil-Choo (Center for Environmental Technology Research, Korea Institute of Science and technology) ;
  • Yoon, Soon-Chang (School of Earth and Environmental Science, Seoul National University)
  • 주옥정 (서울대학교 지구환경과학부) ;
  • 배귀남 (한국과학기술연구원 환경기술연구단) ;
  • 최지은 (서울대학교 지구환경과학부) ;
  • 이승복 (한국과학기술연구원 환경기술연구단) ;
  • 김영성 (한국외국어대학교 환경학과) ;
  • 문길주 (한국과학기술연구원 환경기술연구단) ;
  • 윤순창 (서울대학교 지구환경과학부)
  • Published : 2007.06.30
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Abstract

To differentiate temperature effect from the light intensity effect on the formation of secondary products during the photooxidation of toluene-$NO_x$-air mixtures, steady-state air temperature was changed from $20^{\circ}C\;to\;33^{\circ}C$ at the same light intensity of $0.39min^{-1}$ in an indoor smog chamber. Smog chamber consisted of 64 blacklights and a $5.8m^3$ reaction bag made of Teflon film. Air temperature was controlled by an air-conditioning system. The starting time for rapid conversion of NO to $NO_2$ was slightly delayed with decreasing air temperature. In contrast to light intensity effect, the ozone formation time and the ozone production rate were insensitive to air temperature. Although the formation time for secondary organic aerosols was not changed, the particle number concentration increased with temperature. However, the newly formed secondary organic aerosol mass at lower temperature was higher than that at higher temperature. Since light intensity significantly affected the starting time and quantity of ozone and aerosol formation, it is considered that the temperature could contribute partly the quantity of aerosol formation during the photooxidation of toluene-$NO_x$-air mixtures.

Keywords

References

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