Effects of Cl Ions upon Combustion of Particulate on TiO2-supported CuO Catalysts

Combustion of diesel particulate on titania-supported copper oxide was enhanced when it was prepared from copper chloride. This was ascribed to chlorine ions still remaining in the catalyst, since the catalyst prepared from copper nitrate showed a poor activity for combustion. It was also found that the high activity was elongated by an addition of KCl into the catalyst prepared from copper chloride.