A Stud on the Catalytic Removal of Nitric Oxide

질소산화물의 촉매반응에 의한 저감기술에 관한 연구

  • Published : 1998.02.01

Abstract

We have studied the reduction of NO by propane over perovskite-type oxides prepared by malic acid method. The catalysts were modified to enhance the activity by substitution by substitution of metal into A or B site of perovskite oxides. In addition, the reaction conditions, such as temperature, $O_2$ concentration, space velocity have been studed. In the $LaCoO_3$ type catalyst, the partial substitution of Ba, Sr into A site enhanced the catalytic activity in the reduction of NO. In the $La_{0.6}Sr_{0.4}Co_{1-x}Fe_xO_3(x=0 \sim 1.9)$ catalyst, the partial substitution of Fe into B site enhanced the conversion of NO, but excess amount of Fe decreased the conversion of NO. The surface area and catalytic activity of perovskite catalysts prepared by malic acid method showed higher values than those of solid reaction method. In the $La_{0.6}Sr_{0.4}Co_{1-x}Fe_xO_3$ catalyst, the conversion of NO increased with increasing $O_2$ concentration and contact time. The introduction of water into reactant feed decreased the catalytic activity.

References

  1. Trans. Faraday Soc. v.61 Dicken, P.G.;M.S. Whittingham
  2. Physica v.19 Jonker, G.H.;J.H. van Santen
  3. Japan, J. Appl. Phys. v.14 Obayashi, H.
  4. Appl. Cata., B v.8 Simultaneous catalytic removal $NO_x$ and diesel soot particulates over ternary AB₂O₄spinel-type oxides Shangguan, W.F.;Y. Teraoka;S. Kagawa
  5. Science v.171 Promising catalyst for autoexhaust Libby, W.F.
  6. Structure, properties and preparation of perovskite-type compounds Galasso, F.S.
  7. Catalysis v.3 A catalytic process for the reduction of $NO_x$ form stationary sources Nam, I.S.
  8. Catalysis v.11 no.1 Park, D.R.;H.S. Park
  9. J. Kor. Ind. & Eng. Chem. v.7 no.3 A study on the catalytic characteristics of oxygen reduction in the alkaline fuel cell Moon, H.D.;H.I. Lee
  10. J. solid State Chem. v.14 Perovskites containing ruthenium as catalysts for nitric oxide reduction Voorhoeve, R.J.H.
  11. Solid State Ionics v.45 Cook, R.L;A.F. Sammuells
  12. Catal. Lett. v.9 Torikai, Y.;H. Yahiro;N. Misuno;M. Iwamoto
  13. Nitrogen oxides and their effect on health Lee, S.D.
  14. Applied Industrial Catalysis v.3 Briggs, W.S.
  15. J. Am. Chem. Soc. v.75 Parravano. G.
  16. Nature v.226 Meadowsroft. D.B.