Preparation and catalytic performance of La0.8Sr0.2CoO3 supported on the mullite fiber ceramic

Abstract

The perovskite-type La_0.8Sr_0.2CoO₃ supported on the mullite fiber porous ceramics was prepared by means of the impregnating method, and was then characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD); thus we can come to the conclusion that the perovskite-type composite oxidant can disperse on the surface of mullite fiber ceramics. The catalytic activity of the La_0.8Sr_0.2CoO₃ for NO and CO was evaluated. The effect of the doped 0.1 wt-% PdCl₂ on the catalytic activity of the perovskite-type La_0.8Sr_0.2CoO₃ was also discussed. The results show that the conversion rates of NO and CO respectively reaches 74.5% and 99% at 601°C without doped Pd, and both reach 100% at 350°C with a little doped Pd.

Keywords

Perovskites-type La_0.8Sr_0.2CoO₃, Mullite fiber, porous ceramics, support, palladium, catalytic activity