Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (12): 3285-3290.doi: 10.3866/PKU.WHXB20101137

• CATALYSIS AND SURFACE STRUCTURE • Previous Articles     Next Articles

Catalytic Combustion of Toluene over CuxCo1?x/Al2O3/FeCrAl Monolithic Catalysts

ZHAO Fu-Zhen1, ZENG Peng-Hui1,2, JI Sheng-Fu1, YANG Xiao1, LI Cheng-Yue1   

  1. 1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China;
    2. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102200, P. R. China
  • Received:2010-06-09 Revised:2010-07-29 Published:2010-12-01
  • Contact: JI Sheng-Fu E-mail:jisf@mail.buct.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20473009).

Abstract:

A series of CuxCo1-x/Al2O3/FeCrAl (x=0-1) catalysts were prepared using an FeCrAl alloy as support, a boehmite primer sol as the first washcoat layer and copper as well as cobalt oxides as the active washcoat layer. The structure of the catalysts was characterized using X-ray powder diffraction (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS) and temperatureprogrammed reduction (TPR). Toluene was chosen as the model compound to evaluate the catalytic activity in a conventional fixed-bed quartz reactor. Results indicate that a Cu-Co-O solid solution phase was present when the content of Cu in the catalysts was low and a CuO phase was present when the content of Cu was high. Both Co2+ and Co3+ were present on the surface of the obtained monolithic catalysts while Cu2+ was the main Cu species. The addition of a proper amount of copper oxide improved the reducibility of the cobalt oxide, which enhanced the catalytic activity of the catalysts. All the obtained catalysts showed good activity for the catalytic combustion of toluene. The Cu0.5Co0.5/Al2O3/FeCrAl catalyst had the best catalytic activity, and toluene was totally oxidized at 374 °C over it.

Key words: FeCrAl, Monolithic catalyst, Toluene catalytic combustion, X-ray powder diffraction, X-ray photoelectron spectroscopy

MSC2000: 

  • O643