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    • 2. 发明授权
    • Material with a channel structure for eliminating oxides of nitrogen
    • 具有消除氮氧化物的通道结构的材料
    • US06797247B2
    • 2004-09-28
    • US10141785
    • 2002-05-10
    • Thierry BecueGil MabilonPhilippe Villeret
    • Thierry BecueGil MabilonPhilippe Villeret
    • B01D5356
    • B01J20/2808B01D53/02B01D53/9481B01J20/041B01J20/06B01J20/08B01J20/103B01J20/18B01J20/28057B01J20/28095B01J20/3078B01J20/3433B01J20/3483B01J23/02B01J23/34
    • The invention concerns materials for eliminating oxides of nitrogen NO and NO2 present in exhaust gases, in particular from the internal combustion engines of automotive vehicles operating in a medium that is super-stoichiometric in oxidizing agents, which can adsorb oxides of nitrogen then desorb the oxides of nitrogen by elevating the temperature with respect to the adsorption temperature or by passage of a rich mixture, the materials comprising mixed oxides the metals of which are in octahedral co-ordination, with the octahedra connecting together so that the structure generates micropores in the form of channels. The channel width of the materials is such that the sides are composed of 2 and/or 3 octahedra. These materials adsorb oxides of nitrogen by insertion and do not become poisoned in contact with oxides of sulfur and carbon contained in the gases. In the presence of a group VIII metal or another suitable element such as iron, zinc or aluminum, these materials are capable of eliminating oxides of nitrogen adsorbed by reduction during passage of a rich mixture.
    • 本发明涉及用于消除废气中NO,NO 2的氧化物的材料,特别是从在氧化剂中超化学计量的介质中操作的机动车的内燃机中,其可以吸附氮氧化物,然后解吸氧化物 的氮气通过相对于吸附温度升高温度或通过富混合物通过,其中包含其金属为八面体配位的混合氧化物的材料与八面体连接在一起,使得该结构产生形式的微孔 的渠道。 材料的通道宽度使得侧面由2和/或3个八面体组成。 这些材料通过插入吸附氮的氧化物,并且不会与气体中所含的硫和碳的氧化物接触而中毒。 在第VIII族金属或其他合适的元素如铁,锌或铝的存在下,这些材料能够通过富集混合物通过期间的还原而除去吸附的氮的氧化物。