分别采用聚乙二醇凝胶法、球磨法及浸渍法合成了类钙钛矿型复合氧化物和负载型催化剂,利用XRD、BET、TPD、TPR和XPS等手段对催化剂的物化性能进行表征,考察了它们对CO还原NO反应的催化性能.结果表明,样品都具有K2NiF4结构,CO还原NO反应的催化活性不仅与催化剂的比表面积、物相及氧空穴有关,还与催化剂表面的Co含量有关;PrSrCoO4(650℃)催化剂显示出较高的催化活性;负载适量的贵金属Pt,不仅不会改变催化剂的K2NiF4结构,而且还能促进CO还原NO的催化活性提高,且负载量为0.5%时最适宜.
参考文献
| [1] | 张润铎,全燮,杨凤林,郑钟植.采用蜂窝状筛网催化剂进行NH3选择性催化还原NO的反应[J].化学工程,2003(02):33-37. |
| [2] | 倪哲明,俞卫华,王力耕,郭志强,葛忠华.Cu-Co-Al类水滑石的合成、表征及吸附NOx性能的研究[J].高校化学工程学报,2005(02):223-227. |
| [3] | 梁斌;邱礼有;Calis H P 等.Ce/β-分子筛催化剂上NH3选择还原NO反应动力学研究[J].高校化学工程学报,1999,13(03):217-222. |
| [4] | Misono M;Lombardo E A .Perovskites chaper 6.2 elimination of pollutant gases-oxidation of CO,reduction and decomposition of NO[J].Catalysis Today,1990,8(02):239-245. |
| [5] | Amor J N .Envirometal catalysis[J].Applied Catalysis B:Environmental,1992,1(02):221-227. |
| [6] | Yang X M;Luo L T;Zhong H .Preparation of LnSrCoO4 mixed oxides and their catalytic properties in the oxidation of CO and C3H8[J].Catalysis Communications,2005,6:13-17. |
| [7] | Wu Y.;Liu Y.;Yang XG.;Zhao Z. .The role of redox property of La2-x(Sr,Th)(x)CuO4 +/-lambda playing in the reaction of NO decomposition and NO reduction by CO[J].Journal of molecular catalysis, A. Chemical,2000(1/2):89-100. |
| [8] | Zhao Z;Yang X G;Wu Y .Comparative study of nickel-based perovskite-like mixed catalysts for direct decomposition of NO[J].Applied Catalysis B:Environmental,1996,8(03):281-297. |
| [9] | Yang XM;Luo LT;Zhong H .Structure of La2-xSrxCoO4 +/-lambda (x=0.0-1.0) and their catalytic properties in the oxidation of CO and C3H8[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2004(1/2):299-303. |
| [10] | LAITAO LUO;HUA ZHONG;XIAOMAO YANG .Oxidative performance and surface properties of Co-containing mixed oxides having the K_2NiF_4 structure[J].Journal of the Serbian Chemical Society,2004(10):783-790. |
| [11] | Yang X M;Luo L T;Zhong H .Catalytic properties of LnSrCoO4 (Ln=La,Sm) in the oxidation of CO and C3H8[J].Reaction Kinetics and Catalysis Letters,2004,81(02):219-227. |
| [12] | Yan X H;Rao G H;Liang J K .XPS studies of oxidized La0.9R0.1(Co,Fe)13 alloys[J].Chinese Science Bulletin,1994,39(11):896-901. |
| [13] | 孙大勇,李兴林,徐文国,刘淑莹.稀土富勒烯电子结构的XPS研究[J].分析测试学报,1998(04):5-7. |
| [14] | 吴越,高利珍,于作龙.La2-xSrxCuO4-λ复合氧化物的合成、表征和氨的氧化催化性能的研究[J].化学学报,1997(01):56-63. |
| [15] | Ladavos A K;Pomonis P J .Mechanistic aspects of NO+CO reaction on La1-xSrxNiO4-δ (x=0.00～1.50) perovskite-type oxides[J].Applied Catalysis A:General,1997,165:7385. |
| [16] | 严菁,马建新,周伟.富氢气氛下CO选择性氧化催化剂Pt/γ-Al2O3中添加钴的作用[J].化学学报,2004(21):2143-2149. |
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%