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    • 17. 发明授权
    • Catalyst composition for diesel particulate filter
    • 柴油颗粒过滤器的催化剂组成
    • US07797931B2
    • 2010-09-21
    • US11766397
    • 2007-06-21
    • Alexei A DubkovAlbert N ChigapovBrendan Patrick Carberry
    • Alexei A DubkovAlbert N ChigapovBrendan Patrick Carberry
    • F01N3/10F01N3/021B01J23/40B01J21/00B01J8/02
    • B01D53/944B01D2255/102B01D2255/206B01D2255/20761B01D2255/40B01J23/894B01J37/0201B01J37/038F01N3/0231Y02A50/2345
    • A catalyst composition is provided for use on a diesel particulate filter which facilitates the oxidation of soot from diesel engine exhaust and which generates low NO2 emissions during regeneration of the filter. The catalyst composition includes a catalytic metal comprising a platinum group metal selected from Pt, Pd, Pt—Pd, or combinations thereof, an active metal oxide component containing Cu and La; and an oxide component selected from oxides of Co, Fe, or combinations thereof. The catalyst composition includes a support selected from alumina, silica, zirconia, or combinations thereof. The catalyst composition may be provided on a diesel particulate filter by impregnating the filter with an alumina, silica or zirconia sol solution modified with glycerol and/or saccharose, impregnating the filter with a stabilizing solution, and impregnating the filter with a solution containing the catalyst metal precursor(s), the active metal oxide precursor(s) and the Co or Fe oxide(s). The resulting catalyst coated diesel particulate filter provides effective soot oxidation, exhibits good thermal stability, has a high BET surface area, exhibits minimal backpressure, and produces low NO2 emissions during filter regeneration.
    • 提供了一种用于柴油微粒过滤器的催化剂组合物,该柴油颗粒过滤器有利于烟灰从柴油发动机排气中氧化并且在过滤器再生期间产生低NO 2排放。 催化剂组合物包括含有选自Pt,Pd,Pt-Pd或其组合的铂族金属的催化金属,含有Cu和La的活性金属氧化物组分; 和选自Co,Fe的氧化物或其组合的氧化物组分。 催化剂组合物包括选自氧化铝,二氧化硅,氧化锆或其组合的载体。 可以通过用用甘油和/或蔗糖改性的氧化铝,二氧化硅或氧化锆溶胶溶液浸渍过滤器,将催化剂组合物提供在柴油机微粒过滤器上,用稳定溶液浸渍过滤器,并用含有催化剂的溶液浸渍过滤器 金属前体,活性金属氧化物前体和Co或Fe氧化物。 所得催化剂涂覆的柴油颗粒过滤器提供有效的烟灰氧化,显示出良好的热稳定性,具有高的BET表面积,表现出最小的背压,并且在过滤器再生期间产生低的NO 2排放。