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    • 9. 发明授权
    • Selective catalytic reduction
    • 选择性催化还原
    • US07431906B2
    • 2008-10-07
    • US10478031
    • 2002-03-21
    • Jürgen LangRüdiger SchütteMarkus Rudek
    • Jürgen LangRüdiger SchütteMarkus Rudek
    • B01D53/56
    • B01D53/9409F01N2240/25F01N2610/02
    • A process for the selective catalytic reduction of nitrogen oxides with ammonia in a lean-mix exhaust gas from a combustion process operated with a first, lean-mix air/fuel mixture, wherein the ammonia required for selective reduction is obtained from a second, rich-mix air/fuel mixture which contains nitrogen monoxide by reduction of the nitrogen monoxide in a NH3 synthesis step to give ammonia with the formation of a product gas stream, and where the nitrogen monoxide-containing second air/fuel mixture is supplied to the NH3 synthesis step for reduction of the nitrogen monoxide to ammonia over a three-way converter catalyst and the ammonia formed is separated from the product gas stream and is stored in a storage medium for use as and when required for selective catalytic reduction.
    • 一种在用第一稀混合空气/燃料混合物操作的燃烧过程的稀混废气中用氨选择性催化还原氮氧化物的方法,其中选择还原所需的氨是从第二种富含 - 通过在NH 3合成步骤中还原一氧化氮而混合含有一氧化氮的空气/燃料混合物,以产生形成产物气流的氨,并且其中含一氧化氮的第二空气 /燃料混合物供应到NH 3合成步骤,通过三元转化催化剂将一氧化氮还原成氨,并将形成的氨与产物气流分离并储存在储存器 用于选择性催化还原所需的介质。