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    • 4. 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。
    • 5. 发明授权
    • Enhanced NOx trap having increased durability
    • 增强的NOx捕集器具有增加的耐久性
    • US06727202B2
    • 2004-04-27
    • US09933586
    • 2001-08-21
    • Michel DeebaShau-Lin F. ChenJohn K. HochmuthPatrick L. BurkXinyi Wei
    • Michel DeebaShau-Lin F. ChenJohn K. HochmuthPatrick L. BurkXinyi Wei
    • B01J3702
    • F01N3/0842B01D53/9431B01J23/34B01J23/6562B01J23/92B01J37/0201B01J37/0242B01J37/0248F01N3/0814F01N2250/12F01N2370/02F01N2370/22Y02C20/10Y02T10/24
    • A catalytic trap disposed in an exhaust passage of an internal combustion engine which is operated with periodic alternations between lean and stoichiometric or rich conditions, for abatement of NOx in an exhaust gas stream which is generated by the engine. The trap comprises a catalytic trap material and a refractory carrier member on which the catalytic trap material is disposed. The catalytic trap material comprises: (i) a refractory metal oxide support; (ii) a catalytic component effective for promoting the reduction of NOx under stoichiometric or rich conditions; and (iii) a NOx sorbent effective for adsorbing the NOx under lean conditions and desorbing and reducing the NOx to nitrogen under stoichiometric or rich conditions. The NOx sorbent comprises a metal oxide selected from the group consisting of one or alkali metal oxides, alkaline earth metal oxides and mixtures of one or more alkali metal oxides and alkaline earth metal oxides. The manganese component is selected from the group consisting of: (1) a manganese oxide, (2) a mixed oxide of manganese and a transition metal and/or a rare earth metal, (3) a compound of an alkali metal and a manganese oxide, (4) a compound of an alkaline earth metal and a manganese oxide and (5) mixtures of the foregoing oxides and compounds.
    • 设置在内燃机的排气通道中的催化捕集器,其在稀薄和化学计量或富含条件之间的周期性变化下操作,以减少由发动机产生的废气流中的NOx。 捕集器包括催化捕集材料和其上设置有催化捕集材料的耐火载体构件。 催化捕集材料包括:(i)难熔金属氧化物载体; (ii)在化学计量或富含条件下有效促进NOx还原的催化组分; 和(iii)有效地在稀薄条件下吸附NOx的NOx吸附剂,并且在化学计量或富含条件下将NOx解吸并还原成氮。 NOx吸附剂包括选自一种或碱金属氧化物,碱土金属氧化物和一种或多种碱金属氧化物和碱土金属氧化物的混合物的金属氧化物。 锰成分选自:(1)锰氧化物,(2)锰与过渡金属和/或稀土金属的混合氧化物,(3)碱金属和锰的化合物 氧化物,(4)碱土金属和氧化锰的化合物和(5)上述氧化物和化合物的混合物。
    • 8. 发明授权
    • SOx tolerant NOx trap catalysts and methods of making and using the same
    • SOx耐受性NOx捕集催化剂及其制备和使用方法
    • US06777370B2
    • 2004-08-17
    • US09834505
    • 2001-04-13
    • Shau-Lin F. Chen
    • Shau-Lin F. Chen
    • B01J2334
    • B01D53/945B01D2255/1021B01D2255/1023B01D2255/1025B01D2255/206B01D2255/9022B01D2255/91B01J23/58B01J23/63B01J23/8892B01J35/0006B01J37/0248Y02T10/22
    • The present invention relates to a layered catalyst composite useful for reducing contaminants in exhaust gas streams, especially gaseous streams containing sulfur oxide contaminants. More specifically, the present invention is concerned with improved catalysts of the type generally referred to as “three-way conversion” catalysts. The layered catalysts trap sulfur oxide contaminants which tend to poison three-way conversion catalysts used to abate other pollutants in the stream. The layered catalyst composites of the present invention have a sulfur oxide absorbing layer before or above a nitrogen oxide absorbing layer. The layered catalyst composite comprises a first layer and a second layer. The first layer comprises a first support and at least one first platinum component. The second layer comprises a second support and a SOx sorbent component, wherein the SOx sorbent component is selected from the group consisting of MgAl2O4, MnO, MnO2, and Li2O. The sulfur oxide absorbing layer selectively and reversibly absorbs sulfur oxides over nitrogen oxides and prevents or alleviates sulfur oxide poisoning of the nitrogen oxide trap.
    • 本发明涉及一种用于减少废气流中污染物,特别是含有硫氧化物污染物的气流的层状催化剂复合物。 更具体地,本发明涉及通常称为“三向转化”催化剂的改进的催化剂。 分层催化剂捕获硫氧化物污染物,其倾向于毒化用于消除流中其它污染物的三元转化催化剂。 本发明的层状催化剂复合体在氮氧化物吸收层之前或之上具有硫氧化物吸收层。 层状催化剂复合材料包括第一层和第二层。 第一层包括第一载体和至少一种第一铂组分。 第二层包括第二载体和SOx吸附剂组分,其中SO x吸附剂组分选自MgAl 2 O 4,MnO,MnO 2和Li 2 O。 硫氧化物吸收层选择性地且可逆地吸收氮氧化物上的硫氧化物并且防止或减轻氮氧化物阱的硫氧化物中毒。
    • 9. 发明授权
    • Layered SOX tolerant NOX trap catalysts and methods of making and using the same
    • 层状SOX耐受性NOX捕集催化剂及其制备和使用方法
    • US06923945B2
    • 2005-08-02
    • US10766374
    • 2004-01-28
    • Shau-Lin F. Chen
    • Shau-Lin F. Chen
    • F01N3/10B01D53/94B01J23/58B01J23/63B01J23/656B01J23/889B01J35/00B01J37/02F01N3/28B01D53/50B01D53/56B01D53/60
    • B01D53/945B01D2255/1021B01D2255/1023B01D2255/1025B01D2255/206B01D2255/9022B01D2255/91B01J23/58B01J23/63B01J23/8892B01J35/0006B01J37/0248Y02T10/22
    • The present invention relates to a layered catalyst composite useful for reducing contaminants in exhaust gas streams, especially gaseous streams containing sulfur oxide contaminants. More specifically, the present invention is concerned with improved catalysts of the type generally referred to as “three-way conversion” catalysts. The layered catalysts trap sulfur oxide contaminants which tend to poison three-way conversion catalysts used to abate other pollutants in the stream. The layered catalyst composites of the present invention have a sulfur oxide absorbing layer before or above a nitrogen oxide absorbing layer. The layered catalyst composite comprises a first layer and a second layer. The first layer comprises a first support and at least one first platinum component. The second layer comprises a second support and a SOx sorbent component having a free energy of formation from about 0 to about −90 Kcal/mole at 350° C. The sulfur oxide absorbing layer selectively and reversibly absorbs sulfur oxides over nitrogen oxides and prevents or alleviates sulfur oxide poisoning of the nitrogen oxide trap.
    • 本发明涉及一种用于减少废气流中污染物,特别是含有硫氧化物污染物的气流的层状催化剂复合物。 更具体地,本发明涉及通常称为“三向转化”催化剂的改进的催化剂。 分层催化剂捕获硫氧化物污染物,其倾向于毒化用于消除流中其它污染物的三元转化催化剂。 本发明的层状催化剂复合体在氮氧化物吸收层之前或之上具有硫氧化物吸收层。 层状催化剂复合材料包括第一层和第二层。 第一层包括第一载体和至少一种第一铂组分。 第二层包括在350℃下具有约0至约-90Kcal /摩尔的形成自由能的第二载体和SO x吸附剂组分。硫氧化物吸收层选择性地和可逆地吸收 硫氧化物超过氮氧化物,并防止或减轻氮氧化物陷阱的硫氧化物中毒。