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    • 1. 发明申请
    • PLASMA-ASSISTED NOx REDUCTION
    • 等离子体辅助的NOx还原
    • WO2006036311A3
    • 2006-11-23
    • PCT/US2005028206
    • 2005-08-09
    • GEN MOTORS CORP
    • CHO BYONG KLEE JONG-HWAN
    • B01D53/56B01D53/86B01J8/00C01B21/00
    • B01D53/90B01D53/32B01D53/8621B01D2251/104
    • Ozone (16), preferably produced in an ambient air stream passed through a non-thermal hyperplasma reactor (14), is added to the hot exhaust gas stream (10) from a lean-burn (oxygen-rich) combustion source. The ozone (16) converts much of the NO in the NO x containing exhaust stream (10) to NO 2 . The resulting NO 2 /NO x ratio can be controlled by the input energy density to the plasma reactor (14). Ammonia and/or urea (18) is added to the ozone treated exhaust in proportion to the NO x content, and the stream passed into contact with a reduction catalyst (12), such as a base metal-exchanged zeolite, to convert the NO x to nitrogen.
    • 优选在通过非热等离子体反应器(14)的环境空气流中产生的臭氧(16)从稀燃(富氧)燃烧源加入到热废气流(10)中。 臭氧(16)将含有NO x的排气流(10)中的大部分NO转化为NO 2 2。 可以通过等离子体反应器(14)的输入能量密度来控制所得到的NO 2 / NO x / x比。 将氨和/或尿素(18)按比例添加到经臭氧处理的废气中,并且该物流与还原催化剂(12)接触,例如贱金属 - 交换沸石,以将NO x x N转化成氮。