Ca 이온이 VOx/TiO2 SCR 반응에 미치는 영향 연구

Effect of Ca Ion on the SCR Reaction over VOx/TiO2

  • 김거종 (경기대학교 일반대학원 환경에너지공학과) ;
  • 홍성창 (경기대학교 일반대학원 환경에너지공학과)
  • Kim, Geo Jong (Department of Environmental Energy Systems Engineering, Graduate school of Kyonggi University) ;
  • Hong, Sung Chang (Department of Environmental Energy Systems Engineering, Graduate school of Kyonggi University)
  • 투고 : 2016.01.14
  • 심사 : 2016.02.22
  • 발행 : 2016.04.10


본 연구에서는, 실제 $150000Nm^3/hr$ 규모의 연소로에서 운전된 $VO_x/TiO_2$ SCR 촉매의 활성저하 원인을 규명하고자 XRD, BET, AES ICP, $H_2$-TPR, $NH_3$-TPD 분석을 수행하였다. $TiO_2$의 상전이 및 $VO_x$의 결정화가 발생하지 않았기 때문에 열에 의한 촉매의 활성저하는 없는 것으로 나타났다. 반면, 성분 분석결과 S의 함량이 검출되지 않고 Ca이 다량 검출됨에 따라 $SO_2$에 의한 피독이 아닌 Ca에 의한 피독이 발생하였음을 확인하였으며 이러한 Ca의 피독은 $NH_3$의 흡착량을 감소시켜 반응활성을 감소시키는 것으로 나타났다.


연구 과제 주관 기관 : 경기대학교


  1. S.-U. Park and Y.-H. Lee, Spatial distribution of wet deposition of nitrogen in South Korea, Atmos. Environ., 36, 619-628 (2002).
  2. K. Skalska, J. S. Miller, and S. Ledakowicz, Trends in NOx abatement: A review, Sci. Total Environ., 408, 3976-3989 (2010).
  3. G. Ertl, H. Knozinger, F. Schuth, and J. Weitkamp, Handbook of Heterogeneous catalysis, 2nd ed., 2352-2385, Wiley-VCH, German (2008).
  4. M. Calatayud and C. Minot, Effect of alkali doping on a $V_2O_5$/$TiO_2$ catalyst from periodic DFT calculations, J. Phys. Chem. C, 111, 6411-6417 (2007).
  5. L. Chen, J. Li, and M. Ge, The poisoning effect of alkali metals doping over nano $V_2O_5$-$WO_3$$TiO_2$ catalysts on selective catalytic reduction of NOx by $NH_3$, Chem. Eng. J., 170, 531-537 (2011).
  6. M. Klimczak P. Kern, T. Heinzelmann, M. Lucas, and P. Claus, High-throughput study of the effects of inorganic additives and poisons on $NH_3$-SCR catalysts-Part I:$V_2O_5$-$WO_3$$TiO_2$ catalysts, Appl. Catal. B-Environ., 95, 39-47 (2010).
  7. Q. Wan, L. Duan, J. Li, L. Chen, K. He, and J. Hao, Deactivation performance and mechanism of alkali (earth) metals on $V_2O_5$-$WO_3$$TiO_2$ catalyst for oxidation of gaseous elemental mercury in simulated coal-fired flue gas, Catal. Today, 175, 189-195 (2011).
  8. K. H. Park, J. Y. Lee, S. H. Hong, S. H. Choi, and S. C. Hong, A study on the deactivation of commercial $deNO_x$ catalyst in fired power plant, Appl. Chem. Eng., 19, 376-381 (2008).
  9. A. Satsuma, S. Takenaka, T. Tanaka, and S. Nojima, Studies on the preparation of supported metal oxide catalyst using JRC-reference catalysts; II. Vanadia-titania catalyst: effect of starting solution and phase of titania, Appl. Catal. A-Gen., 232, 93-106 (2002).
  10. E. M. Serwicka, Surface area and porosity, X-ray diffraction and chemical analyses, Catal. today, 56, 335-346 (2000).
  11. P. Forzatti, I. Nova, and A. Beretta, Catalytic properties in $deNO_x$ and $SO_2$-$SO_3$ reactions, Catal. today, 56, 431-441 (2000).
  12. F. Tang, B. Xu, H. Shi, J. Qiu, and Y. Fan, The poisoning effect of $Na^+$ and $Ca^{2+}$ ions doped on the $V_2O_5$/$TiO_2$ catalysts for selective catalytic reduction of NO by $NH_3$, Appl. Catal. B-Environ., 94, 71-76 (2010).
  13. T. Shikada and K. Fujimoto, Effect of added alkali salts on the activities of supported vanadium oxide catalysts for nitric oxide reduction, Chem. Lett., 12, 77-80 (1983).
  14. D. Nicosia, I. Czekaj, and O. Krocher, Chemical deactivation of $V_2O_5$/$WO_3$$TiO_2$ SCR catalysts by additives and impurities from fuels, lubrication oils and urea solution: part II. Characterization, Appl. Cata. B-Environ., 77, 228-236 (2008).
  15. O. Krocher and M. Elsener, Chemical deactivation of $V_2O_5$/$WO_3$$TiO_2$ SCR catalysts by additives and impurities from fuels, lubrication oils, and urea solution: I. Catalytic studies, Appl. Cata. B-Environ., 77, 215-227 (2008).
  16. D. Nicosia, M. Elsener, O. Krocher, and P. Jansohn, Basic investigation of the chemical deactivation of $V_2O_5$/$WO_3$$TiO_2$ SCR catalysts by potassium, calcium, and phosphate, Top. Catal., 42, 333-336 (2007).
  17. L. Lietti, P. Forzatti, and F. Bregani, Steady-State and Transient Reactivity Study of $TiO_2$-Supported $V_2O_5$-$WO_3$
  18. A. Sorrentino, S. Rega, D. Sannino, A. Magliano, P. Ciambelli, and E. Santacesaria, Performances of $V_2O_5$-based catalysts obtained by grafting vanadyl tri-isopropoxide on $TiO_2$-$SiO_2$ in SCR, Appl. Catal. A-Gen., 209, 45-57 (2001).