The Effect of Volume and Precious Metal loading on the Performance of Pd+Rh Three Way Catalysts

Pd+Rh 삼원촉매에서 촉매체적 및 귀금속량이 정화성능에 미치는 영향

  • 김계윤 (서울산업대학교 산업대학교 기계공학과)
  • Published : 1999.05.01

Abstract

Recently the use of Pd catalyst have been continued to expand because of cost avaliabilityand performance advantages. Especially the Pd+Rh catalyst instead of the Pt+Rh catalyst had been used for most of three way catalysts because of the more stringent emission standards and its higher temperature effectiveness. The main purpose of this study is to investigate the design parameter impacts on the Pd+Rh cat-alyst for the automotive exhaust catalysts application. This study was investigated on the catalyst efficiency for the volume and the precious metal loading of the Pd+Rh ceramic monolithic cata-lyst. And experiments concerning the effects of volume and precious metal loading on Pd+Rh three way catalysts were conducted to examined the catalyst light-off temperature and conver-sion efficiency on higher volume demonstrated almost similar performance. But their effects on higher precious metal loading demonstrated considerably better performance.

References

  1. SAE 910842 Performance of Palladium Automotive Catalysts Hideaki Muraki
  2. SAE 950258 Impact of Pt-Rh and Pd-Rh Interactions on Performance of Bimetal Catalysts J. G. Nunan;W. B. Williamson;H. J. Robota;M. G. Henk
  3. SAE 980663 Development of Close-coupled Catalyst Systems for European Driving Conditions A. Waltner;G. Loose;A. Hirshmann;L. Mubmann;D. Lindner;W. Muller
  4. SAE 970267 Evaluation of In-Line Adsorber Technology Carol L. Buhrmaster;Robert J. Locker;M. D. Patil;James N. Nagel;Louis S. Socha
  5. SAE 971022 Technologies for Reducing Cold-Start Emission of V6 ULEVs Kimiyoshi Nishizawa;Takashi Yamada;Yasuji Ishizuka;Toshiaki Inoue
  6. Catalytic air Pollution Control Ronald M. Heck;Robert J. Farrauto
  7. SAE 912600 Johnson Matthey Automotive Catalyst Technology B. J. Cooper;E. R. Becker;T. J. Truex
  8. New Automotive Catalyst Development to meet future Emission Standard B. H. Engler;G. T. Garr;E. S. Lox;M. G. Jung