采用共沉淀-浸渍法制备了新型催化剂Pt-Pd/BaO/TiAlO, 通过对催化剂进行NOx吸附储存实验、有硫(SO2)和无硫情况下的NOx储存-还原循环实验以及程序升温脱附、程序升温还原、N2吸附-脱附和X射线衍射等表征分析,考察了该催化剂的储存NOx性能以及抗硫性能. 结果表明,在Pt-Pd/BaO/TiAlO中,复合氧化物TiAlO为储存NOx的组分兼载体, Ti和Al原子比为1:2时,储存NOx能力最大;BaO (4%)作为助剂不但增加了催化剂的热稳定性,还提高了其储存NOx的能力. 与Pt/BaO/γ-Al2O3相比, Pt-Pd/BaO/TiAlO具有良好的抗硫性能. Pt-Pd/BaO/TiAlO上吸附形成的硫化物稳定性较差,易被还原脱除,这是其抗硫性能良好的原因之一.
参考文献
[1] | Takahashi N;Shinjoh H;Iijima T;Suzuki T Yamazaki K Yokota K Suzuki H Miyoshi N Matsumoto S Tanizawa T Tanaka T Tateishi S Kasahara K .[J].Catalysis Today,1996,27(1-2):63. |
[2] | James D;Fourre E;Ishii M;Bowker M .[J].Applied Catalysis B:Environmental,2003,45(02):147. |
[3] | Cant N W;Patterson M J .[J].Catalysis Today,2002,73(3-4):271. |
[4] | Nakatsuji T;Komppa V .[J].Catalysis Today,2002,75(1-4):407. |
[5] | Salasc S;Skoglundh M;Fridell E .[J].Applied Catalysis B:Environmental,2002,36(02):145. |
[6] | Westerberg B;Fridell E .[J].Journal of Molecular Catalysis A:Chemical,2001,165(1-2):249. |
[7] | Liotta L F;Macaluso A;Arena G E;Livi M Centi G Deganello G .[J].Catalysis Today,2002,75(1-4):439. |
[8] | Epling W S;Campbell L E;Yezerets A;Currier N W Parks J E .[J].Catalysis Reviews-science and Engineering,2004,46(02):163. |
[9] | Huang H Y;Long R Q;Yang R T .[J].Applied Catalysis B:Environmental,2001,33(02):127. |
[10] | 姜国峰.[J].中国金属通报,2005(18):13. |
[11] | 何俊,陈英,李雪辉,马玉刚,陈小平,王乐夫.Pd/Mg(Al)O催化剂上NOx的储存-还原[J].燃料化学学报,2006(03):348-352. |
[12] | Arena G E;Bianchini A;Centi G;Vazzana F .[J].Topics in Catalysis,2001,16-17(1-4):157. |
[13] | Matsumoto S I .[J].Catalysis Today,2004,90(3-4):183. |
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