[Catalytic performance of Ce/Zr series catalysts on soot combustion].
Catalytic performances of Ce/Zr series catalysts (Ce(x)Zr(1-x)O2) on soot combustion and the influence of feed gas were investigated by TG and TPO. The catalytic activity is high, and affects by the Ce/Zr ratio. The concentration of O2 affects the speed-limited step during the process of soot combustion. H2O showed no effect on the catalytic activity for soot combustion on Ce(0.5)Zr(0.5)O2. NO could promote soot combustion by presenting NO2, a more powerful oxidant than O2, and the ignition temperature of soot decreased 30 degrees C. Results of TG and TPO show that the beta species oxygen on the catalyst take part in the combustion process.
Zhu
Ling
L
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Wang
Xue-Zhong
XZ
Hao
Zheng-Ping
ZP
D000393:Air Pollutants / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D002563:Cerium / Q000737:chemistry*; D010316:Particle Size; D053260:Soot; D015040:Zirconium / Q000737:chemistry*
D000393:Air Pollutants; D053260:Soot; D002563:Cerium; D002244:Carbon; D015040:Zirconium