화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
HWAHAK KONGHAK, Vol.38, No.5, 706-710, October, 2000
Export Citation
석탄연소로에서 소성된 석회석에 의한 암모늄 라디칼의 산화반응
Oxidation of NH3 on Calcined Limestone in a Coal Combustor
이시훈, 정상문, 이종민1, 김용전, 방진환, 김재성1, 김상돈†
  • 한국과학기술원 화학공학과 & 에너지/환경 연구센터, 대전
  • 1한전 전력연구원 발전연구실 연소 신발전그룹, 대전
See Hoon Lee, Sang Mun Jeong, Yong Jeon Kim1, Jin Hwan Bang, Jin Hwan Bang, Jae Sung Kim1, and Sang Done Kim†
  • Department of Chemical Engineering and Energy and Environment Research Center, Korea Advanced Institute of Science and Technology, Taejon, Korea
  • 1Power Generation Lab., Advanced Power Generation & Combustion Group, KEPRI, KEPCO, Taejon, Korea
E-mail:
초록
고정층 반응기와 드래프트 관을 갖는 내부 순환유동층 반응기(main bed: 0.3 m I.D.X2.0 m high, freeboard: 0.3 m I.D.X0.53 high)에서 석회석과 암모니아의 산화반응을 연구하였다. 고정층 반응기에서 주입된 암모니아는 소성된 석회석과 산소와 반응하여 대부분 NO로 전환되었으며 반응온도에는 큰 변화를 보이지 않았다. 그러나 황화된 석회석은 NH3와 반응하지 않아 NO로의 전환이 이루어지지 않았다. 내부 순환유동층 연소로에서는 석회석 투입량이 증가할수록 석탄 연소시 발생하는 암모니아 라디칼이 석회석 존재하에서 산소와 반응하여 NO 생성이 증가하였다. 따라서 유동층 연소로의 경우 탈황을 위해 공급되는 석회석의 탈황 전환율이 증가하면 NO 생성이 감소됨을 알 수 있다.
Ammonia oxidation of limestone was studied in fixed and internally circulating fluidized bed(Main bed: 0.3 m I.D.*2.0 m high, Freeboard: 0.3 m I.D.*0.53 m high) reactors. In a fixed bed reactor, injected NH3 reacted with oxygen to produce NO on calcined limestone and the effect of reaction temperature on the conversion is found to be insignificant. However, NO conversion by the oxidation of NH3 on the sulfated limestone is negligibly small due to the low selectivity of the oxidation. The higher the amount of limestone injection to the fluidized bed combustor, the more NO produces by the formation of ammonia radicals during the course of coal combustion. As the desulfurization proseeds, the less NO forms in a fluidized bed combustor employing limestone for SOx removal.
Keywords:NOx;Limestone;Oxidation;Ammonia
  1. Park YS, Ghim YS, Son JE, Maeng KS, HWAHAK KONGHAK, 28(5), 568 (1990)
  2. Fluidized bed combust research group: "Report of Conference on Fluidized Bed Combust," Ministry of Commerce, Industry and Energy (1998)
  3. Lee JM, Kim JS, HWAHAK KONGHAK, 38(1), 53 (2000)
  4. Jeong SM, "Removal of SOx/NOx Using CuO/γ-Al2O3 and Limestone in a Fluidized Bed Reactor," Ph.D. thesis, KAIST (1999)
  5. Lee JM, Kim YJ, Kim SD, HWAHAK KONGHAK, 38(2), 259 (2000)
  6. Blanco J, Banda FG, delaAvila P, Melo F, J. Phys. Chem., 90, 4789 (1986) 
  7. Jeong SM, Jung SH, Yoo KS, Kim SD, Ind. Eng. Chem. Res., 38(6), 2210 (1999) 
  8. Lee YY, Sekthira A, Wong CM, Proceeding of the 8th Int. Conferenceon Fluidized Bed Combustion, U.S. Department of Energy, Office of Fossil Energy, Morgatown, West Virginia, U.S.A., 1208 (1985)
  9. Lin W, Senary MK, Bleek M, Fluidized Bed Combustion ASME 1991, 649 (1991)
  10. Jodal M, Nielsen C, Hulgaard T, Dam-Johnson K, 23rd. Symposium(International) on Combustion/The Combustion Institute, 237 (1990)
  11. Wallman PH, Carlsson RCJ, Fuel, 72, 187 (1993) 
  12. Kang SK, "Reaction Kinetics of Limestone-SOx in a Thermogravimetric Analyzer and a Fluidized Bed Combustor," Ph.D. thesis, KAIST (1992)
  13. Jeong SM, Kim SD, Ind. Eng. Chem. Res., 39(6), 1911 (2000) 
  14. Shun D, Bae DH, Han KH, Son JE, Kang Y, Wee YH, Lee JS, Ji PS, HWAHAK KONGHAK, 34(3), 321 (1996)
  15. Jones PA, Syngle DV, Wu BTSS, Proceeding of the 13th Int. Conferenceon Fluidized Bed Combustion, ASME, New York, 713 (1995)
  16. Leckner B, Karlsson M, Weinell CE, Kilpinen P, Hwpa M, Ind. Eng. Chem. Res., 30(2), 396 (1991) 
  17. Tang JT, Taylor TE, Proc. of 4th Int. Conf. on CFB, Somerset, Pennsylvania, 766 (1993)