采用共沉淀法制备了ZrO2-MnO2催化剂,考察了CeO2,MoO3和WO3的添加对ZrO2-MnO2整体式催化剂上NH3选择性催化还原(NH3-SCR)NOx的影响,并利用低温N2吸附-脱附、X射线衍射、X射线光电子能谱、NH3和NO程序升温脱附等方法对催化剂进行了表征,结果表明催化剂物相为Mn0.2Zr0.8O1.8固溶体,CeO2和WO3分散在其中:添加MoO3或WO3后,样品中出现了新的中强酸位,强吸附的NO物种增加,从而有利于催化剂中高温活性的提高.另外,Mn和Ce物种主要分别以Mn4+和Ce4+形式存在,在NH3-SCR反应中,CeO2的添加提高了ZrO2-MnO2催化剂的低温活性,但反应温度窗口较窄；继续添加MoO3或WO3后,催化剂表现出良好的低温活性和宽的反应温度窗口,其中WO3/CeO2/ZrO2-MnO2催化剂上NO的起燃温度为176℃,且反应温度在240～424℃范围内,NOx转化率大于90%,具有良好的低温活性和宽的温度窗口.
参考文献
| [1] | 马斯特斯;程俊人.环境科学技术导论[M].北京:科学出版社,1982:184. |
| [2] | 周芸芸,钱枫,付颖.烟气脱硫脱硝技术进展[J].北京工商大学学报（自然科学版）,2006(03):17-20. |
| [3] | Smirniotis P G;Pena D A;Uphade B S .[J].Angewandte Chemie International Edition,2001,40:2479. |
| [4] | Iwasaki M;Yamazaki K;Banno K;Shinjoh H .Characterization of Fe/ZSM-5 DeNO(x) catalysts prepared by different methods: Relationships between active Fe sites and NH3-SCR performance[J].Journal of Catalysis,2008(2):205-216. |
| [5] | Yu J;Guo F;Wang Y L;Zhu J H Liu Y Y Su F S Gao S Q Xu G W .[J].Applied Catalysis B:Environmental,2010,95:160. |
| [6] | Park JH;Park HJ;Baik JH;Nam IS;Shin CH;Lee JH;Cho BK;Oh SH .Hydrothermal stability of CuZSM5 catalyst in reducing NO by NH3 for the urea selective catalytic reduction process[J].Journal of Catalysis,2006(1):47-57. |
| [7] | Si Z C;Weng D;Wu X D;Li J Li G .[J].Journal of Catalysis,2010,271:43. |
| [8] | Kang M;Kim D J;Park E D;Kim J M Yie J E Kim S H Hope-weeks L Eyring E M .[J].Applied Catalysis B:Environmental,2006,68:21. |
| [9] | 李雪辉,李华,高翔,陈志航,杨青,王芙蓉,王乐夫.共沉淀法制备Cr-Mn复合氧化物及其低温催化还原NOx性能[J].催化学报,2011(03):477-482. |
| [10] | Liu F D;He H;Zhang C B.[J].Chemical Communications,2008:2043. |
| [11] | Liu F D;He H;Ding Y;Zhang C B .[J].Applied Catalysis B:Environmental,2009,93:194. |
| [12] | Wu Z B;Jiang B Q;Liu Y .[J].Applied Catalysis B:Environmental,2008,79:347. |
| [13] | Verdier S;Rohart E;Bradshaw H;Harris D,Bichon Ph,Delahay G .SAE Paper,2008-01-1022[R]. |
| [14] | Sohn J R;Cho E S.[J].Applied Catalysis A:General,2005:282,147. |
| [15] | Chen Y Z;Liaw B J;Kao Ch F;Kuo J Ch .[J].Applied Catalysis A:General,2001,217:23. |
| [16] | 李伟,林涛,张秋林,龚茂初,陈耀强.整体式MnOx-CeO2/ZrO2-TiO2催化剂用于NH3低温选择性催化还原NO[J].催化学报,2009(02):104-110. |
| [17] | 徐海迪,邱春天,张秋林,林涛,龚茂初,陈耀强.WO3对MnOx-CeO2/ZrO2-TiO2整体式催化剂NH3选择性催化还原NOx性能的影响[J].物理化学学报,2010(09):2449-2454. |
| [18] | Qi G S;Yang R T;Chang R .[J].Applied Catalysis B:Environmental,2004,51:93. |
| [19] | Shen Y S;Zhu S M;Qiu T;Shen S B .[J].Catalyst Communication,2009,11:20. |
| [20] | 林涛,李伟,龚茂初,喻瑶,杜波,陈耀强.ZrO2-TiO2-CeO2的制备及其在NH3选择性催化还原NO中的应用[J].物理化学学报,2007(12):1851-1856. |
| [21] | Lietti L;Forzatti P;Bregani F .[J].Industrial and Engineering Chemistry Research,1996,35:3884. |
| [22] | Lietti L;Alemany J L;Forzatti P;Busca G Ramis G Giamello E Bregani F .[J].Catalysis Today,1996,29:143. |
| [23] | Lietti L .[J].Applied Catalysis B:Environmental,1996,10:281. |
| [24] | Xie G Y;Liu Z Y;Zhu Z P;Liu Q Y Ge J Huang Z G .[J].Journal of Catalysis,2004,224:36. |
| [25] | Xie G Y;Liu Z Y;Zhu Z P;Liu Q Y Ge J Huang Z G .[J].Journal of Catalysis,2004,224:42. |
| [26] | López E F;Escribano V S;Resini C;Gallardo-Amores J M Busca G .[J].Applied Catalysis B:Environmental,2001,29:251. |
| [27] | Gutierrez-Ortiz J I;Rivas B D;Lopez-Fonseca R;Martin S Gonzalez-Velasco J R .[J].Chemosphere,2007,68:1004. |
| [28] | Machida M;Uto M;Kurogi D;Kijima T .[J].Chemistry of Materials,2000,12:3158. |
| [29] | Busca G;Larrubia M A;Arrighi L;Ramis G .[J].Catalysis Today,2005,107-108:139. |
| [30] | Busca G;Lietti L;Ramis G;Berti F .[J].Applied Catalysis B:Environmental,1998,18:1. |
| [31] | Bagnasco G;Busca G;Galli P;Massucci M A Melanová K Patrono P Ramis G Turco M .[J].Applied Catalysis B:Environmental,2000,28:135. |
| [32] | Forzatti P .[J].Applied Catalysis A:General,2001,222:221. |
| [33] | Jia L W;Shen M Q;Wang J;Chu X Wang J M Hu Z C .[J].Journal of Rare Earths,2008,26:523. |
| [34] | 李烨,程昊,李德意,秦永生,王树东.添加WO3提高铈锆固溶体的氨选择性催化还原NOx反应活性[J].催化学报,2008(06):547-552. |
| [35] | 刘清雅,刘振宇,李成岳.NH3在选择性催化还原NO过程中的吸附与活化[J].催化学报,2006(07):636-646. |
| [36] | Ding Z Y;Li L X;Wade D;Gloyna E F .[J].Industrial and Engineering Chemistry Research,1998,37:1707. |
| [37] | 唐晓龙,郝吉明,徐文国,李俊华.新型MnOx催化剂用于低温NH3选择性催化还原NOx[J].催化学报,2006(10):843-848. |
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%