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1. 发明授权

US06996975B2 Multistage reductant injection strategy for slipless, high efficiency selective catalytic reduction 失效
标题翻译：多级还原剂注射策略为无Slip，高效选择性催化还原
公开(公告)号：US06996975B2
公开(公告)日：2006-02-14
申请号：US10877598
申请日：2004-06-25
申请人： Subbaraya Radhamohan , Michael Eugene Crane
发明人： Subbaraya Radhamohan , Michael Eugene Crane
IPC分类号： F01N3/00
CPC分类号： F01N3/2066 , F01N3/0814 , F01N13/0097 , F01N2610/02 , Y02A50/2325 , Y02T10/24
摘要： One aspect of the invention relates to an exhaust treatment apparatus having an NOx reduction system comprising first and second catalyst beds in series with associated first and second ammonia injectors. The first catalyst bed with its associated ammonia injector preferably targets removing only about 80 to about 95% percent of the NOx in the vehicle exhaust. The second catalyst bed with its associated injector preferably target removing about 70 to about 100% of the remaining NOx. Staging the reduction system in this manner improves control over NOx reduction and reduces the risk of ammonia slip. Other aspects of the invention relate to methods of treating vehicle exhaust to remove NOx and an SCR reactor comprising a housing having an entrance port, an exit port, and an ammonia injection port, wherein the injection port is configured to inject ammonia in between SCR catalyst beds contained in the housing.
摘要翻译：本发明的一个方面涉及一种排气处理装置，其具有包括与相关联的第一和第二氨喷射器串联的第一和第二催化剂床的NO x x还原系统。具有其相关联的氨喷射器的第一催化剂床优选地仅去除车辆尾气中的约80％至约95％的NO x。具有其相关联的喷射器的第二催化剂床优选地目标是去除剩余的NO x的大约70％至大约100％。以这种方式进行还原系统的分级改进了对减少NOx排放的控制，并降低了氨的滑移风险。本发明的其它方面涉及处理车辆排气以除去NO x和SCR反应器的方法，SCR反应器包括具有入口，出口和氨注入口的壳体，其中注入口为构造成在包含在壳体中的SCR催化剂床之间注入氨。

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