Plasma-assisted NOx reduction
    7.
    发明授权
    Plasma-assisted NOx reduction 有权
    等离子体辅助NOx还原

    公开(公告)号:US07368094B2

    公开(公告)日:2008-05-06

    申请号:US10948403

    申请日:2004-09-23

    IPC分类号: B01D53/56 B01D53/94

    摘要: Ozone, preferably produced in an ambient air stream passed through a non-thermal hyperplasma reactor, is added to the hot exhaust gas stream from a lean-burn (oxygen-rich) combustion source. The ozone converts much of the NO in the NOx containing exhaust stream to NO2. The resulting NO2/NOx ratio can be controlled by the input energy density to the plasma reactor. Ammonia and/or urea is added to the ozone treated exhaust in proportion to the NOx content, and the stream passed into contact with a reduction catalyst, such as a base metal-exchanged zeolite, to convert the NOx to nitrogen.

    摘要翻译: 优选在通过非热等离子体反应器的环境空气流中产生的臭氧被添加到来自稀燃(富氧)燃烧源的热废气流中。 臭氧将含有NO 的排气流中的大部分NO转化为NO 2。 可以通过等离子体反应器的输入能量密度来控制所得到的NO 2 2 / NO x比率。 将氨和/或尿素与NO x含量成比例地添加到经臭氧处理的废气中,并且流与还原催化剂如贱金属交换的沸石接触以将 NO x向氮。