composition, catalytic filter, system and method for treating a poor burning exhaust gas, uses of a catalytic filter and composition, and methods for improving the combustion of soot to reduce the susceptibility of a scr catalyst contained in a decay filter, to decrease the soot combustion temperature, to improve the resistance of a scr catalyst and to collect particulate matter from the exhaust gas emitted from an engine.

摘要

A catalytic filter having a mixture of a scr catalyst and a soot oxidation catalyst is provided, wherein the soot oxidation catalyst is a copper-doped, iron-doped or manganese-doped ceria. mixing a scr catalyst and a soot oxidation catalyst provides a decrease in the maximum oxidation temperature for the removal of soot from the filter. The use of the filter allows for improved soot combustion and reduces the susceptibility of a scr catalyst contained in a filter to deterioration. The soot oxidation catalyst also improves the resistance of the scr catalyst to poisoning and the subsequent deterioration of scr performance.