发明申请
US20090297416A1 ALUMINA-BASED NITROGEN OXIDE (NOx) TRAPPING COMPOSITIONS AND TREATMENT OF VEHICULAR EXHAUST GASES THEREWITH
有权
基于氧化铝的氮氧化物(NOx)捕集组合物及其处理气体排放气体
- 专利标题: ALUMINA-BASED NITROGEN OXIDE (NOx) TRAPPING COMPOSITIONS AND TREATMENT OF VEHICULAR EXHAUST GASES THEREWITH
- 专利标题(中): 基于氧化铝的氮氧化物(NOx)捕集组合物及其处理气体排放气体
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申请号: US12300937申请日: 2007-05-07
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公开(公告)号: US20090297416A1公开(公告)日: 2009-12-03
- 发明人: Emmanuel Rohart , Claire Pitois , Kazuhiko Yokota , Virginia Belliere-Baca , Virginie Harle
- 申请人: Emmanuel Rohart , Claire Pitois , Kazuhiko Yokota , Virginia Belliere-Baca , Virginie Harle
- 申请人地址: FR AUBERVILLIERS
- 专利权人: RHODIA OPERATIONS
- 当前专利权人: RHODIA OPERATIONS
- 当前专利权人地址: FR AUBERVILLIERS
- 优先权: FR06/04356 20060516
- 国际申请: PCT/EP07/54400 WO 20070507
- 主分类号: B01J23/10
- IPC分类号: B01J23/10 ; B01J21/04 ; B01D53/86 ; B01D53/56
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.
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