公开(公告)号：US20090297416A1

公开(公告)日：2009-12-03

申请号：US12300937

申请日：2007-05-07

申请人： Emmanuel Rohart ,  Claire Pitois ,  Kazuhiko Yokota ,  Virginia Belliere-Baca ,  Virginie Harle

发明人： Emmanuel Rohart ,  Claire Pitois ,  Kazuhiko Yokota ,  Virginia Belliere-Baca ,  Virginie Harle

IPC分类号： B01J23/10 ,  B01J21/04 ,  B01D53/86 ,  B01D53/56

CPC分类号： B01D53/9422 ,  B01D2255/1021 ,  B01D2255/204 ,  B01D2255/2042 ,  B01D2255/2065 ,  B01D2258/012 ,  B01J23/002 ,  B01J23/10 ,  B01J23/63 ,  B01J37/0045 ,  B01J2523/00 ,  B01J2523/25 ,  B01J2523/31 ,  B01J2523/3712

摘要： Thermally stable, solid alumina-based compositions useful for the trapping of nitrogen oxides that are contained in gaseous fluids, notably in vehicular exhaust gases, are formed of alumina, cerium and a divalent metal M selected from among barium, strontium or an association of these two elements and which include at least 10% of the weight of element M expressed by weight of oxide in contrast to the total weight of the composition and also wherein the aluminate compound of the metal element M, i.e., MAl204, is absent and not detectable by X-ray diffraction of the composition, after calcination thereof with air at 700° C. for two hours.

摘要翻译： 用于捕获气态流体（特别是车辆废气）中的氮氧化物的热稳定的固体氧化铝基组合物由氧化铝，铈和选自钡，锶或这些缔合物的二价金属M形成 两个元素，并且其包括与组合物的总重量相比表示的元素M的重量的至少10重量％，并且其中金属元素M的铝酸盐化合物即MA1204不存在且不可检测 通过组合物的X射线衍射，在700℃下用空气煅烧2小时。