Catalytic combustion of carbon particulates over perovskite-type oxides

We have studied the catalytic combustion of carbon particulate over perovsk ite type oxides prepared by the melic acid method. The catalysts were modif ied to enhance the activity by substitution of metal into A or B sites of p erovskite oxide. In the LaCoO3 catalyst, the partial substitution of alkali metals into an A site enhanced the catalytic activity in the combustion of soot particulate and the activity was shown in the following order; Cs>K>N a. In La1-xCsxCoO3 catalyst, the catalytic activity increases with increasi ng x value and shows almost constant activity at the substitution of x>0.2.