发明公开
EP0739651A1 Nitrogen oxides reduction catalyst and process for reducing nitrogen oxides in exhaust gas
失效
基本信息:
- 专利标题： Nitrogen oxides reduction catalyst and process for reducing nitrogen oxides in exhaust gas
- 专利标题（中）：在阿巴斯的Katalysator和Verfahren zur Entfernung von Stickstoffoxiden
- 申请号：EP96105332.9 申请日：1996-04-03
- 公开(公告)号：EP0739651A1 公开(公告)日：1996-10-30
- 发明人： Bellussi, Giuseppe , Sabatino, Luigina Maria Flora , Tabata, Takeshi , Kokitsu, Mikako , Okada, Osamu , Ohtsuka, Hirofumi
- 申请人： ENIRICERCHE S.p.A. , OSAKA GAS CO., LTD.
- 申请人地址： Via F. Maritano, 26 I-20097 S. Donato Milanese (Milano) IT
- 专利权人： ENIRICERCHE S.p.A.,OSAKA GAS CO., LTD.
- 当前专利权人： ENIRICERCHE S.p.A.,OSAKA GAS CO., LTD.
- 当前专利权人地址： Via F. Maritano, 26 I-20097 S. Donato Milanese (Milano) IT
- 代理机构： Fusina, Gerolamo
- 优先权： JP116412/95 19950417; JP119114/95 19950419
- 主分类号： B01D53/94
- IPC分类号： B01D53/94 ; B01J29/70
摘要：
The object of the invention is to provide a catalyst for reducing nitrogen oxides (NOx) in exhaust gases, and a NOx reduction process using this catalyst. The NOx reducing catalyst according to the present invention comprises BEA zeolite which is ion-exchanged with Co to have a Co/Al ratio between 0.2 and 0.6 and is loaded with at least one metal selected from among Ca, Sr, Ba, La, Mn, Ag, In, and Ni. The NOx reduction process according to the present invention comprises using the catalyst of the present invention. The catalyst of this invention provides high activity and durability at low temperature in an actual exhaust gas containing water vapor and other substances disturbing catalytic activity. In addition, the second metal added to the catalyst moderately enhances the oxidation activity at low temperature, and promotes NOx adsorption on the catalyst, increases NOx reduction selectivity. Accordingly, it is possible to attain high NOx conversion at even lower temperature and at low NOx and hydrocarbon concentration.
摘要（中）：
本发明的目的是提供一种用于还原废气中的氮氧化物（NOx）的催化剂和使用该催化剂的NOx还原方法。 根据本发明的NOx还原催化剂包含与Co离子交换以使Co / Al比在0.2和0.6之间并且装载有选自Ca，Sr，Ba，La，Mn中的至少一种金属的BEA沸石 ，Ag，In和Ni。 根据本发明的NOx还原方法包括使用本发明的催化剂。 本发明的催化剂在含有水蒸气和其他物质的实际废气中在低温下具有高活性和耐久性，这些废气和其它物质妨碍催化活性。 此外，添加到催化剂中的第二种金属适度提高低温下的氧化活性，并促进催化剂上的NOx吸附，提高NOx还原选择性。 因此，可以在更低的温度和低的NOx和烃浓度下获得高的NOx转化率。