B205 EFFECT OF SYNTHESIS METHOD ON THE ACTIVITY OF LA-BASED PEROVSKITE FOR CATALYTIC COMBUSTION OF METHANE(Combustion-5)

Abstract

The sol-gel citrate method and the co-precipitation method are industrially practical technique to synthesis perovskite for methane combustion. In the present study two methods were compared with respect to their activity for methane combustion. XRD, SEM and TG-DSC were used to characterize the catalysts. The results show that the citrate method was more promising than the co-precipitation method. Higher purity, more uniform and finer particle, lower formation temperature and higher activity are achieved by the citrate precursor. In the co-precipitation method, the convertional oven drying and supercritical drying sample achieves similar catalytic activity for methane combustion.