以浸渍在不同晶相TiO2(金红石型(R)、锐钛矿型(A)和P25型(P))上的锰基催化剂为对象,研究了TiO2晶相对MnOx/TiO2催化剂催化NO氧化活性的影响.结果表明,MnOx/TiO2(P)催化剂活性最高,NO转化率在300℃及GHSV=20000 h-1条件下可达83％.各催化剂活性顺序为MnOx/TiO2(P)＞ MnOx/TiO2(A)＞ MnOx/TiO2(R).采用X射线粉末衍射、场发射扫描电子显微镜、X射线光电子能谱、H2程序升温还原和O2程序升温脱附等手段研究了TiO2晶相影响MnOx/TiO2催化剂催化活性的作用机理.结果表明,相比于A和R型TiO2,P型TiO2能够增加MnOx在其表面的分散度并抑制催化剂颗粒的团聚和粘连,且更有利于Mn2O3的生成,而后者催化NO氧化活性比其它MnOx更高;此外,P型TiO2可以增加MnOx尤其是Mn2O3的还原性,并可促进O2-从M3+-O键的脱附.
参考文献
| [1] | P(a)rvulescua V I;Grange P;Delmon B .[J].Catalysis Today,1998,46:233. |
| [2] | Skalska, K.;Miller, J.S.;Ledakowicz, S. .Trends in NO_x abatement: A review[J].Science of the Total Environment,2010(19):3976-3989. |
| [3] | Ruggeri M P;Grossale A;Nova I;Tronconi E Jirglova H Sobalik Z .[J].Catalysis Today,2012,184:107. |
| [4] | Koebel M;Madia G;Raimondi F;Wokaun A .[J].Journal of Catalysis,2002,209:159. |
| [5] | Ruggeri M P;Nova I;Troncon E .[J].Topics in Catalysis,2013,56:109. |
| [6] | De Paiva J L;Kachan G C .[J].Chemical Engineering Progress,2004,43:941. |
| [7] | Wang Z H;Zhang X;Zhou Z J;Chen W Y Zhou J H Cen K F .[J].Energy & Fuels,2012,26:5583. |
| [8] | Zhao Y;Xu P Y;Fu D;Huang J J Yu H H .[J].Journal of Environmental Sciences,2006,18:281. |
| [9] | Bhatia, D.;McCabe, R.W.;Harold, M.P.;Balakotaiah, V. .Experimental and kinetic study of NO oxidation on model Pt catalysts[J].Journal of Catalysis,2009(1):106-119. |
| [10] | Li L D;Shen Q;Cheng J;Hao Z P .[J].Applied Catalysis B: Environmental,2010,93:259. |
| [11] | Shiba K;Hinode H;Wakihara M .[J].Reaction Kinetics and Catalysis Letters,1996,58:133. |
| [12] | Yung M M;Holmgreen E M;Ozkan U S .[J].Journal of Catalysis,2007,247:356. |
| [13] | Zhang J X;Zhang S L;Cai W;Zhong Q .[J].Applied Surface Science,2013,268:535. |
| [14] | Li L D;Qu L L;Cheng J;Li J J Hao Z .[J].Applied Catalysis B: Environmental,2009,88:224. |
| [15] | Li K;Tang X L;Yi H H;Ning P Song J H Wang J G .[J].Industrial & Engineering Chemistry Research,2011,50:11023. |
| [16] | Li K;Tang X L;Yi H H;Ning P Kang D J Wang C .[J].CHEMICAL ENGINEERING JOURNAL,2012,192:99. |
| [17] | Qi G S;Yang R T .[J].Journal of Catalysis,2003,217:434. |
| [18] | Qi GS.;Yang RT. .Low-temperature selective catalytic reduction of NO with NH3 over iron and manganese oxides supported on titania[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2003(3):217-225. |
| [19] | Irfan MF;Goo JH;Kim SD .Co3O4 based catalysts for NO oxidation and NO, reduction in fast SCR process[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2008(3/4):267-274. |
| [20] | Wu Z B;Tang N;Xiao L;Liu Y Wang H Q .[J].Journal of Colloid and Interface Science,2010,352:143. |
| [21] | 徐文青,赵俊,王海蕊,朱廷钰,李鹏,荆鹏飞.TiO2负载Mn-Co复合氧化物催化剂上NO催化氧化性能[J].物理化学学报,2013(02):385-390. |
| [22] | Tang X L;Hao J M;Yi H H;Li J H .[J].Catalysis Today,2007,126:406. |
| [23] | Pinna F .[J].Catalysis Today,1998,41:129. |
| [24] | Li GQ;Liu CY;Liu Y .Different effects of cerium ions doping on properties of anatase and rutile TiO2[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2006(5):2481-2486. |
| [25] | Ettireddy P R;Ettireddy N;Mamedov S;Boolchand P Smirniotis P G .[J].Applied Catalysis B: Environmental,2007,76:123. |
| [26] | Gallardo-Amores J M;Armaroli T;Ramis G;Finocchio E Busca G .[J].Applied Catalysis B: Environmental,1999,22:249. |
| [27] | Stobbe E R;De Boer B A;Geus J W .[J].Catalysis Today,1999,47:161. |
| [28] | Morales MR;Barbero BP;Cadus LE .Total oxidation of ethanol and propane over Mn-Cu mixed oxide catalysts[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2006(3/4):229-236. |
| [29] | Delimaris D;Ioannides T .[J].Applied Catalysis B: Environmental,2008,84:303. |
| [30] | Tang X L;Hao J M;Xu W G;Li J H .[J].CATALYSIS COMMUNICATIONS,2007,8:329. |
| [31] | Atribak I;Bueno-López A;García-García A;Navarro P Frías D Montes M .[J].Applied Catalysis B: Environmental,2010,93:267. |
| [32] | Cimino A;Indovina V .[J].Journal of Catalysis,1974,33:493. |
| [33] | Sultana A;Sasaki M;Hamada H .[J].Catalysis Today,2012,185:284. |
| [34] | Smirniotis PG;Sreekanth PM;Pena DA;Jenkins RG .Manganese oxide catalysts supported on TiO2, Al2O3, and SiO2: A comparison for low-temperature SCR of NO with NH3[J].Industrial & Engineering Chemistry Research,2006(19):6436-6443. |
| [35] | Park E;Chin S;Jeong J;Jurng J .[J].Microporous and Mesoporous Materials,2012,163:96. |
| [36] | Carja G;Kameshima Y;Okada K;Madhusoodana C D .[J].Applied Catalysis B: Environmental,2007,73:60. |
| [37] | Kapteijn F;Singoredjo L;Andreini A;Moulijn]A .[J].Applied Catalysis B: Environmental,1994,3:173. |
| [38] | Trawczynski J;Bielak B;Mista W .Oxidation of ethanol over supported manganese catalysts-effect of the carrier[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2005(4):277-285. |
| [39] | Leith I R;Howden M G .[J].Applied Catalysis,1988,37:75. |
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