Process for reducing NO.sub.x from exhaust fumes
    6.
    发明授权
    Process for reducing NO.sub.x from exhaust fumes 失效
    从废气中还原NOx的方法

    公开(公告)号:US6153161A

    公开(公告)日:2000-11-28

    申请号:US77597

    申请日:1998-06-02

    摘要: NO.sub.x, where x is 1 and 2, in exhaust gases is reduced over heterogeneous catalysts with hydrocarbons, carbon monoxide, hydrogen or mixtures thereof in the presence of oxygen from 100 to 650.degree. C. and an absolute pressure of from 0.5 to 50 bar by a process in which the heterogeneous catalysts used are bimodal or polymodal compounds of the general formula IA.sub.1-x M.sub.2 O.sub.4 (I),which, if required, are doped with rare earth metals, noble metal, titanium, vanadium, molybdenum, tungsten or mixtures thereof, and whereA is magnesium, calcium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, tin or mixtures thereof,M is aluminum, gallium, indium, tin, chromium, manganese, iron, cobalt, nickel, copper, zinc or mixtures thereof andx is from 0 to 0.99,whose oxygen atoms are in a cubic close packed arrangement and A is present in the tetrahedral sites and M in the octahedral sites, it also being possible for A to occupy octahedral sites if an equivalent amount of M occupies tetrahedral sites.

    摘要翻译: PCT No.PCT / EP96 / 05532 Sec。 371日期1998年6月2日 102(e)1998年6月2日PCT 1996年12月11日PCT PCT。 公开号WO97 / 21482 日期1997年6月19日NO x,其中x为1和2,在100至650℃的氧气存在下,在具有烃,一氧化碳,氢气或其混合物的非均相催化剂中,废气中的x 1和 0.5〜50巴,其中所用的非均相催化剂是通式IA1-xM2O4(Ⅰ)的双峰型或多模态化合物,如果需要,它们掺杂有稀土金属,贵金属,钛,钒,钼, 钨或其混合物,其中A为镁,钙,钛,钒,铬,锰,铁,钴,镍,铜,锌,锡或其混合物,M为铝,镓,铟,锡,铬,锰, 铁,钴,镍,铜,锌或其混合物,x为0至0.99,其氧原子为立方密堆积排列,A存在于四面体位置,M位于八面体位置, A占据八面体网站如果一个等同的amou m的m位于四面体位置。