采用共沉淀-浸渍法制备了不同Mg/Al比的Pt/Mg-Al-O催化剂,并用XRD和TPD等方法进行了表征. 考察了不同反应气氛对载体和催化剂上Nox存储性能的影响. 结果表明,NO2较NO更易被存储,Pt的催化作用加速了NO的氧化反应,提高了催化剂的存储能力. 在350 ℃下,Nox的存储能力随着Mg/Al比的增加而升高,Mg和Al之间存在着协同作用,Al的加入有利于Nox的存储. 低于300 ℃时,Al对Nox存储的促进作用更为显著. N(Mg)/ n(Al)=3的催化剂在150～400 ℃间有较高的存储能力,且300 ℃下达到最大.
参考文献
| [1] | Fridell E;Skoglundh M;Westerberg B;Johansson S,Smedler G .[J].Journal of Catalysis,1999,183(02):196. |
| [2] | Bgner W;Kraer M;Krutzsch B;Pischinger S, Voigtlander D, Wenninger G, Wirbeleit F, Brogan M S, Brisley R J, Webster D E .[J].Applied Catalysis B:Environmental,1995,7(07):153. |
| [3] | 李新刚,孟明,林培琰,陈加福,伏义路,俞寿明,谢亚宁,胡天斗.Co助剂对稀燃NOx阱Pt/Ba-Al-O结构和性能的影响[J].催化学报,2002(05):417-420. |
| [4] | Hodjati S. .Absorption/desorption of NO_x process on perovskites: performances to remove NO_x from a lean exhaust gas[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2000(1):5-16. |
| [5] | Matsumoto S.;Suzuki H.;Ogai M.;Miyoshi N.;Ikeda Y. .NOx storage reduction catalyst for automotive exhaust with improved tolerance against sulfur poisoning[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2000(2/3):115-124. |
| [6] | Centi G;Fornasari G;Gobbi C;Livi M,Trifiro F,Vaccari A .[J].Catalysis Today,2002(73):287. |
| [7] | Fornasari G;Trifiro F;Vaccari A;Prinetto F,Ghiotti G,Centi G .[J].Catalysis Today,2002(75):421. |
| [8] | Tichit D.;Guida A.;Chiche BH.;Figueras F.;Auroux A. Bartalini D.;Garrone E.;Lhouty MH. .TEXTURAL PROPERTIES AND CATALYTIC ACTIVITY OF HYDROTALCITES[J].Journal of Catalysis,1995(1):50-59. |
| [9] | 杨锡尧;任韶玲;何晖;王大庆 .[J].分子催化,1996,10(02):88. |
| [10] | Mahzoul H;Brilhac J F;Gilot P .[J].Applied Catalysis B:Environmental,1999,20(01):47. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%