Particle filter for use in exhaust line of e.g. diesel engine, has caps and ceramic filtering material having porosity of specific percent, where filtering material is saturated with washcoat for retaining nitrous oxide in form of nitrates

摘要

The filter (2) has caps (6) and a ceramic filtering material (3) having a porosity of 40 percent. The material is saturated with washcoat for retaining nitrous oxide in form of nitrates (4). The washcoat has a precious metal e.g. platinum, transition metal and lanthanide oxides and alkaline and alkaline-earth elements. The metal has a mass proportion between 0.01 and 5 percent with respect to total weight of the washcoat. An independent claim is also included for a method for catalytic filtration of particles contained in exhaust gas of an internal combustion engine.