Soot combustion. Co and K catalysts supported on different supports

Abstract

The catalytic combustion of particulate material was studied on cobalt catalysts promoted with potassium using different supports for its preparation. Silica, aluminum oxides and hydroxides, zirconium oxide and hydroxide were used as supports. The catalytic activity for combustion depends on the type of support used, the higher activity corresponding to the supported catalyst on zirconium oxide. TPR studies indicate that the interaction metal/support allows to explain the higher activity of the CoK/SiO 2 catalyst with respect to the CoK/Al 2O 3 but the high activity found in CoK/ZrO 2 is not explained by this interaction. In all cases the Co and K improved the performance of the catalysts.