Acta Phys. -Chim. Sin. ›› 2000, Vol. 16 ›› Issue (05): 402-404.doi: 10.3866/PKU.WHXB20000505

• Communication • Previous Articles     Next Articles

Effects of Synergy of Copper Oxide and Cerium Oxide on DnNOx Activity of CuCeMgAi(O) Catalyst

Wen Bin, He Ming-Yuan, Song Jia-Qing, Zong Bao-Ning, Shu Xing-Tian   

  1. Research Institute of Petroleum Processing,SINOPEC,Beijing 100083
  • Received:2000-01-25 Revised:2000-03-14 Published:2000-05-15
  • Contact: He Ming-Yuan

Abstract:

Ce-Cu-containing catalyst (CeCuMgAl(O)) was prepared by coprecipitation whose catalytic activity for NO+CO in the presence of oxygen was examined and compared with the catalyst free of cerium. The effect of H 2O on the catalytic activity was also investigated. The results show that for NO+CO reaction in the presence of oxygen, the activity-temperature-window of CeCuMgAl(O) shifts to lower temperature than that of CuMgAl(O). The presence of H 2O gives rise to the significant changes of catalytic activity of these two catalysts in low temperature region: great reducing for CuMgAl(O) and intensive increase for CuCeMgAl(O) whereas no obvious effect in high temperature region. The synergy between CuCe oxides and thus much more Cu+ exist in the CeCuMgAl(O) than CuMgAl(O) are responsible for these differences.

Key words: Synergy, DeNOx activity, H2O poisoning, Adsoption site