Device for reducing dibenzo-dioxin and dibenzo-furan and particle emissions

摘要

Device comprises: a transition metal-containing catalyst mounted on a particle filter (5); and a molecular sieve which holds back the polychlorinated dibenzodioxins (PCDD) and polychlorinated dibenzofurans (PCDF), where: the molecular sieve is added between the transition metal containing catalyst and the exhaust gas on purified gas side; and the inflow side of the molecular sieve and/or the device upstream to the molecular sieve exhibit an oxidation activity for hydrocarbons, and/or polychlorinated dibenzodioxins and polychlorinated dibenzofurans. Device comprises: at least a transition metal-containing catalyst mounted on a particle filter (5), which is placed in the exhaust gas conduction of a combustion engine; and at least a molecular sieve which holds back the polychlorinated dibenzodioxins (PCDD) and polychlorinated dibenzofurans (PCDF), where: the molecular sieve is added between the transition metal containing catalyst and the exhaust gas on purified gas side, and the inflow side of the molecular sieve and/or the device upstream to the molecular sieve exhibit an oxidation activity for hydrocarbons, and/or polychlorinated dibenzodioxins and polychlorinated dibenzofurans. An independent claim is included for manufacturing the device comprising producing the transition metal-containing catalyst on the particle filter by coating, preferably ceramic or metallic coating, and applying the molecular sieve layer on the catalyst layer.