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1. 发明申请

US20100233051A1 NITROGEN OXIDE STORAGE CATALYST FEATURING A REDUCED DESULFURIZATION TEMPERATURE 审中-公开
标题翻译：氮氧化物储存催化剂具有减少的脱硫温度
公开(公告)号：US20100233051A1
公开(公告)日：2010-09-16
申请号：US12760151
申请日：2010-04-14
申请人： Ina GRISSTEDE , Friedemann ROHR , Stephan ECKHOFF , Wilfried MUELLER , Thomas KREUZER
发明人： Ina GRISSTEDE , Friedemann ROHR , Stephan ECKHOFF , Wilfried MUELLER , Thomas KREUZER
IPC分类号： B01D53/94 , B01J23/10 , B01J27/232 , B01J21/14 , B01J27/224 , B01J23/42
CPC分类号： B01D53/9422 , B01D2255/1021 , B01D2255/2063 , B01D2255/407 , B01D2255/9155 , B01J23/005 , B01J23/58 , B01J23/63 , B01J37/0248
摘要： Nitrogen oxide storage catalysts are used to remove nitrogen oxides from the exhaust gas of internal combustion engines operated predominantly under lean burn conditions. When these catalysts are used in diesel vehicles, the increased sulfur content in the fuel during operation results in poisoning of the catalyst, which is reversible at high temperatures under reduced exhaust gas conditions. In the case of conventional nitrogen oxide storage catalysts, temperatures of more than 600° C. have to be obtained for desulfurization. This is not always possible in diesel vehicles with a nitrogen oxide storage catalyst in the underbody area.The invention presents a process whose application allows the desulfurization temperature of conventional nitrogen oxide storage catalysts which comprise a platinum component and at least one nitrogen oxide storage material to be lowered. The basicity of the chemical environment of the platinum is lowered, while the nitrogen oxide storage material can remain unchanged as such. In addition, an improved nitrogen oxide storage catalyst with reduced desulfurization temperature which results from the application of the process is presented. Such catalysts are suitable particularly for nitrogen oxide aftertreatment of the exhaust gases of diesel engines.
摘要翻译：氮氧化物储存催化剂用于从主要在稀燃条件下运行的内燃机废气中除去氮氧化物。当这些催化剂用于柴油车辆中时，在运行过程中燃料中硫含量增加导致催化剂中毒，这在低温废气条件下在高温下是可逆的。在常规氮氧化物储存催化剂的情况下，必须获得超过600℃的温度用于脱硫。在底部区域的具有氮氧化物储存催化剂的柴油车辆中并不总是可能的。本发明提出了一种方法，其应用允许降低包含铂组分和至少一种氮氧化物存储材料的常规氮氧化物存储催化剂的脱硫温度。铂的化学环境的碱性降低，而氮氧化物储存材料可以保持不变。另外，提出了一种改进的氮氧化物储存催化剂，其脱硫温度降低，这是由于该方法的应用而产生的。这种催化剂特别适用于柴油机废气的氮氧化物后处理。

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