| 摘要 |
The filter has a filter substrate that comprises material zone provided with oxidation-active coating for removing platinum group elements in exhaust gas of diesel engine. The substrate is made of cordierite, silicon carbide, mullite, or aluminum titanate. The material zone is provided above substrate, for removing the platinum group elements. The filter substrate is comprised of palladium, gold or mixtures of oxides comprising alumina carrier oxide, doped aluminum oxide, titanium dioxide, cerium oxide, zirconium oxide, cerium/zirconium mixed oxide or silicon dioxide. Independent claims are included for the following: (1) a method for preventing contamination of selective catalytic reduction (SCR) catalyst in exhaust-gas treatment system; and (2) an exhaust-gas treatment system for purifying exhaust gas of diesel engine. |
