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    • 48. 发明授权
    • Nitrogen oxide reduction system
    • 氮氧化物还原系统
    • US3972831A
    • 1976-08-03
    • US409263
    • 1973-10-24
    • Harold BeutherThaddeus P. KobylinskiHarold E. Swift
    • Harold BeutherThaddeus P. KobylinskiHarold E. Swift
    • B01D53/92B01J23/46B01J21/02
    • B01D53/927B01J23/462
    • A system is proposed for the purification of exhaust gases from internal combustion engines, preferably the reduction of nitrogen oxides in exhaust gases from internal combustion engines in which nitrogen is selectively formed as substantially the only nitrogen-containing product. The exhaust gas is contacted at an elevated temperature with a noble metal in a reducing atmosphere, wherein nitrogen oxides are selectively converted to nitrogen as substantially the only nitrogen containing product, and/or is contacted with a noble metal in an oxidizing atmosphere, wherein carbon monoxide and unburned hydrocarbons are converted to carbon dioxide and water, said noble metal being distended on a microporous glass body. In a preferred embodiment the exhaust gas is contacted at an elevated temperature in a reducing atmosphere with ruthenium supported on a microporous glass body comprising a leached, phase-separated alkali borosilicate.
    • 提出了一种用于净化来自内燃机的废气的系统,优选地将来自内部选择性地形成氮的内燃机的废气中的氮氧化物还原为基本上唯一的含氮产物。 废气在升高的温度下与还原气氛中的贵金属接触,其中氮氧化物选择性地转化为氮气,基本上仅含有氮的产物,和/或在氧化气氛中与贵金属接触,其中碳 一氧化碳和未燃碳氢化合物被转化为二氧化碳和水,所述贵金属膨胀在微孔玻璃体上。 在优选的实施方案中,废气在还原气氛中在升高的温度下与负载在包含沥滤的相分离的碱金属硼硅酸盐的微孔玻璃体上的钌接触。