Characteristics of Low Temperature De-NOx Process with Non-thermal Plasma and NH3 Selective Catalytic Reduction (II)

저온 플라즈마 및 암모니아 선택적 환원공정을 활용한 저온 탈질공정의 특성(II)

  • Lee, Jae-Ok (Environment and Energy Research Division, Korea Institute of Machinery and Materials) ;
  • Song, Young-Hoon (Environment and Energy Research Division, Korea Institute of Machinery and Materials)
  • 이재옥 (한국기계연구원 환경.에너지기계연구본부) ;
  • 송영훈 (한국기계연구원 환경.에너지기계연구본부)
  • Received : 2006.05.30
  • Accepted : 2006.06.21
  • Published : 2006.08.10

Abstract

Effects of water vapor, hydrocarbons, and CO, which are inevitably included in exhaust gases of combustion, on a combined $De-NO_{x}$ process of non-thermal plasma and $NH_{3}$ SCR (Selective Catalytic Reduction) have been investigated. Test results showed that fast SCR reaction enhanced $De-NO_{x}$ rate under the low temperature conditions, $150{\sim}200^{\circ}C$ The present test, however, showed that the role of the fast SCR reaction can be significantly suppressed by addition of hydrocarbons in a non-thermal plasma reactor. Detailed investigation verified that such suppressed role of the fast SCR reaction could be caused by the $NO_{2}/NO_{x}$ ratio modified by aldehydes produced from hydrocarbons in a non-thermal plasma reactor. In addition, the present study was confirmed that the effects of water vapor and CO were not noticeable compared with the hydrocarbon effects.

Acknowledgement

Grant : 플라즈마/촉매를 이용한 탈질공정기술개발

Supported by : 에너지관리공단

References

  1. Th. Hammer, Th. Kappes, and M. Baldauf, Catalysis Today, 89, 5 (2004) https://doi.org/10.1016/j.cattod.2003.11.001
  2. M. Koebel, G. Madia, and M. Elsener, Catalysis Today, 73, 239 (2002) https://doi.org/10.1016/S0920-5861(02)00006-8
  3. M. Koebel, M. Elsener, and G. Madia, Ind. Eng. Chem. Res., 40, 52 (2001) https://doi.org/10.1021/ie000551y
  4. E. A. Filimonova, Y. H. Kim, S. H. Hong, and Y. H. Song, J. Phys. D: Appl. Phys., 35, 2795 (2002) https://doi.org/10.1088/0022-3727/35/21/316
  5. Y. S. Mok, D. J. Koh, D. N. Shin, and K. T. Kim, Fuel Processing Technology, 86, 303 (2004) https://doi.org/10.1016/j.fuproc.2004.05.004
  6. J. O. Lee and Y. H. Song, submitted in J. Korean Ind. Eng. Chem., (2006)
  7. M. S. Cha, Y. H. Song, J. O. Lee, and S. J. Kim, Proceedings of 16th Int'l Symposium on Plasma Chemistry, Taormina, Italy, June 22 (2003)
  8. H. Bosch and F. Janssen, Catalysis Today, 2, 369 (1988) https://doi.org/10.1016/0920-5861(88)80002-6
  9. W. O. Siegl, R. H. Hammerle, H. M. Herrmann, B. W. Wenclawiak, and B. Luers-Jongen, Atmospheric Environment, 33, 797 (1999) https://doi.org/10.1016/S1352-2310(98)00209-X
  10. B. M. Penetrante, Plasma chemistry and power consumption in non-thermal De-NOx, proceedings of non-thermal plasma techniques for pollution control-part A: overview, fundamentals and supporting technologies, edited by B. M. Penetrante and S.E. Schultheis, Springer-Verlag: Berlin, Germany (1993)
  11. B. M. Penetrante, SAE982508 (1998)
  12. K. G. Rappe, J. W. Hoard, C. L. Aardahl, P. W. Park, C. H. F. Peden, and D. N. Tran, Catalysis Today, 89, 143 (2004) https://doi.org/10.1016/j.cattod.2003.11.020
  13. T. M. Orlando, A. Alexandrov, A. Lebsack, J. Herring, and J. W. Hoard, Catalysis Today, 89, 151 (2004) https://doi.org/10.1016/j.cattod.2003.11.021