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

이재옥; 송영훈; Jae-Ok Lee; Young-Hoon Song

Journal of the Korean Industrial and Engineering Chemistry, Vol.17, No.4, 414-419, August, 2006

Export Citation

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

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

이재옥^†, 송영훈

한국기계연구원 환경ㆍ에너지기계연구본부

Jae-Ok Lee^†, and Young-Hoon Song

Environment and Energy Research Division, Korea Institute of Machinery and Materials, Daejeon, Korea

E-mail:

초록

연소 배기가스 중의 수분, 탄화수소 및 CO가 저온 플라즈마 및 NH3 SCR (Selective Catalytic Reduction)공정이 복합된 탈질공정에 미치는 영향에 대한 연구가 수행되었다. 실험결과 일반적인 SCR 반응에 비해 매우 빠른 반응속도를 갖는 fast SCR 반응은 150～200 ℃의 저온조건에서 탈질율의 상승을 가져다주지만, 처리가스 중에 탄화수소가 있는 경우 fast SCR 반응의 역할이 상당히 감소되는 것을 확인할 수 있었다. 이는 저온 플라즈마 반응기에서 부분산화반응을 통해 탄화수소 중 일부가 알데히드로 전환되며, 알데히드는 fast SCR 반응에 있어 중요한 변수인 NO2/NOx 비율에 영향을 주기 때문인 것으로 설명되었다. 한편, 수분 및 CO가 fast SCR 반응에 미치는 영향은 탄화수소에 비해 상대적으로 적음을 확인할 수 있었다.

Effects of water vapor, hydrocarbons, and CO, which are inevitably included in exhaust gases of combustion, on a combined De-NOx process of non-thermal plasma and NH3 SCR (Selective Catalytic Reduction) have been investigated. Test results showed that fast SCR reaction enhanced De-NOx rate under the low temperature conditions, 150～200 ℃. 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 NO2/NOx 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.

Keywords:non-thermal plasma;NH3 SCR processes;Aldehydes;fast SCR reaction

[References]

Hammer T, Kappes T, Baldauf M, Catal. Today, 89(1-2), 5 (2004)
Koebel M, Madia G, Elsener M, Catal. Today, 73(3-4), 239 (2002)
Koebel M, Elsener M, Madia G, Ind. Eng. Chem. Res., 40(1), 52 (2001)
Filimonova EA, Kim YH, Hong SH, Song YH, J. Phys. D-Appl. Phys., 35, 2795 (2002)
Mok YS, Koh DJ, Shin DN, Kim KT, Fuel Process. Technol., 86, 303 (2004)
Lee JO, Song YH, J. Korean Ind. Eng. Chem., Submitted in (2006)
Cha MS, Song YH, Lee JO, Kim SJ, Proceedings of 16th Int’l Symposium on Plasma Chemistry, Taormina, Italy, June 22 (2003)
Bosch H, Janssen F, Catal. Today, 2, 369 (1988)
Siegl WO, Hammerle RH, Herrmann HM, Wenclawiak BW, Luers-Jongen B, Atmos. Environ., 33, 797 (1999)
Penetrante BM, 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)
Penetrante BM, SAE982508 (1998)
Rappe KG, Hoard JW, Aardahl CL, Park PW, Peden CHF, Tran DN, Catal. Today, 89(1-2), 143 (2004)
Orlando TM, Alexandrov A, Lebsack A, Herring J, Hoard JW, Catal. Today, 89(1-2), 151 (2004)

[Referenced By]

[1] Hammer T, Kappes T, Baldauf M, Catal. Today, 89(1-2), 5 (2004)

[2] Koebel M, Madia G, Elsener M, Catal. Today, 73(3-4), 239 (2002)

[3] Koebel M, Elsener M, Madia G, Ind. Eng. Chem. Res., 40(1), 52 (2001)

[4] Filimonova EA, Kim YH, Hong SH, Song YH, J. Phys. D-Appl. Phys., 35, 2795 (2002)

[5] Mok YS, Koh DJ, Shin DN, Kim KT, Fuel Process. Technol., 86, 303 (2004)

[6] Lee JO, Song YH, J. Korean Ind. Eng. Chem., Submitted in (2006)

[7] Cha MS, Song YH, Lee JO, Kim SJ, Proceedings of 16th Int’l Symposium on Plasma Chemistry, Taormina, Italy, June 22 (2003)

[8] Bosch H, Janssen F, Catal. Today, 2, 369 (1988)

[9] Siegl WO, Hammerle RH, Herrmann HM, Wenclawiak BW, Luers-Jongen B, Atmos. Environ., 33, 797 (1999)

[10] Penetrante BM, 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] Penetrante BM, SAE982508 (1998)

[12] Rappe KG, Hoard JW, Aardahl CL, Park PW, Peden CHF, Tran DN, Catal. Today, 89(1-2), 143 (2004)

[13] Orlando TM, Alexandrov A, Lebsack A, Herring J, Hoard JW, Catal. Today, 89(1-2), 151 (2004)