| 摘要 |
Device for reducing the emissions of polychlorinated dibenzodioxin (PCDD) and polychlorinated dibenzofuran (PCDF) from transition metal-containing catalyst for the selective catalytic reduction (SCR) of nitric oxide in the exhaust gas of a combustion engine using ammonia and/or ammonia-separating reducer, is claimed, where the upstream of at least one transition metal-containing SCR-catalyst or at least a catalyst for the oxidation of hydrocarbon-containing PCDD and PCDF precursor substances is arranged. Device for reducing the emissions of polychlorinated dibenzodioxin (PCDD) and polychlorinated dibenzofuran (PCDF) from transition metal-containing catalyst for the selective catalytic reduction (SCR) of nitric oxide in the exhaust gas of a combustion engine using ammonia and/or ammonia-separating reducer, is claimed, where the upstream of the at least one transition metal-containing SCR-catalyst or at least a catalyst for the oxidation of hydrocarbon-containing PCDD and PCDF precursor substances and/or downstream of the at least one transition metal-containing SCR-catalyst or at least a catalyst for the decomposition of the PCDD and/or PCDF is arranged; and the catalyst for the decomposition of PCDD, PCDF and/or the catalyst for the oxidation of its hydrocarbon-containing precursor substances exhibits additionally an activity for the reduction of nitric oxide using ammonia. |
