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    • 1. 发明授权
    • Catalytic material having improved conversion performance
    • 催化材料具有改进的转化性能
    • US6110862A
    • 2000-08-29
    • US74239
    • 1998-05-07
    • Shau-Lin F. ChenHarold N. RabinowitzChong Kim
    • Shau-Lin F. ChenHarold N. RabinowitzChong Kim
    • B01D53/94B01D53/86B01J23/40B01J32/00B01J35/10
    • B01D53/865B01J23/40B01J35/1042B01J35/108Y02C20/10
    • A novel catalytic material is prepared by dispersing a catalytically active species, e.g., one or more platinum group metals, on a support phase that contains a high porosity, meso-pores high surface area (HPMPHSA) material. The HPMPHSA material has a porosity, measured in milliliters per gram of material, that is typically at least about 30 percent greater than that of a corresponding conventional material, preferably at least 50 percent greater. In a particular embodiment, the support phase of the catalytic material contains a HPMPHSA alumina having a porosity of about 0.9 ml/g, whereas a conventional alumina typically has a porosity of about 0.45 ml/g. The surface area is above 90, preferably above 100, more preferably equal or above 150 to 160 m.sup.2 /g. The support phase may be wholly composed of the HPMPHSA material or it may be composed of a mixture of the HPMPHSA material and a conventional material. Such a mixture preferably contains at least about 20 percent HPMPHSA material, by weight, e.g., 20 to 50 percent by weight.
    • 通过将催化活性物质,例如一种或多种铂族金属分散在含有高孔隙率,中孔高表面积(HPMPHSA)材料的载体相上来制备新的催化材料。 HPMPHSA材料具有以毫克/克材料测量的孔隙率,其通常比相应的常规材料的孔隙率至少大约30%,优选地至少大于50%。 在一个具体实施方案中,催化材料的载体相含有孔隙率为约0.9ml / g的HPMPHSA氧化铝,而常规氧化铝通常具有约0.45ml / g的孔隙率。 表面积大于90,优选大于100,更优选等于或高于150至160m2 / g。 支撑相可以完全由HPMPHSA材料组成,或者它可以由HPMPHSA材料和常规材料的混合物组成。 这种混合物优选含有至少约20%重量的HPMPHSA材料,例如20至50%重量。
    • 6. 发明授权
    • Multi-zone catalytic converter
    • 多区催化转化器
    • US07524465B2
    • 2009-04-28
    • US11482651
    • 2006-07-07
    • Sanath V. KumarHarold N. RabinowitzJohn J. Steger
    • Sanath V. KumarHarold N. RabinowitzJohn J. Steger
    • B01D50/00
    • F01N3/0842B01D53/945B01J23/44B01J35/04F01N3/0814F01N3/28F01N13/0097F01N2570/16
    • Provided is an exhaust article (catalyst) coated on a single substrate, such as a monolithic honeycomb having a plurality of channels along the axial length of the catalyst. Different washcoat compositions are deposited along the length the channel walls of the substrate beginning from either the inlet or outlet axial end of the substrate to form inlet and outlet catalyst layers, respectively. In the coating process, the channel walls are coated with catalyst washcoat compositions to lengths that are less than the substrates' axial length. The architecture of the resulting catalyst layers defines a plurality of zones along the length of the substrate. The properties of each zone of the catalyst can be optimized to address specific catalyst functions by manipulation of both the coating lengths and the catalyst washcoat compositions.
    • 提供了涂覆在单个基板上的排气制品(催化剂),例如沿着催化剂的轴向长度具有多个通道的整体式蜂窝体。 不同的修补基面涂层组合物沿着衬底的通道壁的长度沉积,从衬底的入口或出口轴向端开始分别形成入口和出口催化剂层。 在涂覆过程中,通道壁涂覆有催化剂修补基面涂层组合物,其长度小于基材的轴向长度。 所得到的催化剂层的结构限定了沿衬底长度的多个区域。 催化剂的每个区域的性质可以通过操纵涂层长度和催化剂修补基面涂料组合物来优化以满足具体的催化剂功能。