The promotional effect of the interaction between titania and ceria on the catalytic performance for selective reduction of NO was studied.The catalysts,CeO2,TiO2,CeO2/TiO2 and TixCe1-xO2,were synthesized and tested in NH3-Selective catalytic reduction (SCR) of NO,and the samples were characterized by the Brunaller,Emmett and Teller (BET absorbed gas N2),X-ray diffraction (XRD),high resolution transmission electron microscopy (HR-TEM),and temperature programmed desorption (TPD NH3) techniques.The improvement mechanism of the interaction between the titania and ceria had been explored and discussed from two aspects of micro-structure and surface acidity.The interaction between the titania and ceria greatly improved the catalytic activity but had little effect on the active temperature.It was first reported that the acid amount determined the catalytic activity and the acid strength determined the active temperature for NH3-SCR of NO.
参考文献
| [1] | Forzatti P .Present status and perspectives in de-NOx SCR catalysis[J].Applied Catalysis A:General,2001,222(1-2):221. |
| [2] | Isabella Nova;Cristian Ciardelli;Enrico Tronconi .NH_3-SCR of NO over a V-based Catalyst: Low-T Redox Kinetics with NH_3 Inhibition[J].AIChE Journal,2006(9):3222-3233. |
| [3] | In-Young Lee;Dong-Wha Kim;Jung-Bin Lee;Kyong-Ok Yoo .A practical scale evaluation of sulfated V_2O_5/TiO_2 catalyst from metatitanic acid for selective catalytic reduction of NO by NH_3[J].Chemical Engineering Journal,2002(3):267-272. |
| [4] | Iwanoto M .Recent progress in novel catalytic removal of nitrogen monoxide[J].Catalysis Today,1994,22(01):1. |
| [5] | Busca G;Lietti L;Ramis G;Berti F .Chemical and mechanistic aspects of the selective catalytic reduction of NOx by ammonia over oxide catalysts:A review[J].Applied Catalysis B:Environmental,1998,18(1-2):1. |
| [6] | Chmielarz L;Ku(s)trowski P;Dziembaj R;Cool P,Vansant E F .Catalytic performance of various mesoporous silicas modified with copper or iron oxides introduced by different ways in the selective reduction of NO by ammonia[J].Applied Catalysis B:Environmental,2006,62(3-4):369. |
| [7] | He C H;Paulus M;Chu W;Find J Nickl J A K(o)hler K .Selective catalytic reduction of NO by C3H8 over CoOx/Al2O3:An investigation of structure-activity relationships[J].Catalysis Today,2008,131(1-4):305. |
| [8] | Bennici S;Gervasini A;Ravasio N;Zaccheria F .Optimization of tailoring of CuOx species of silica alumina supported catalysts for the selective catalytic reduction of NOx[J].Journal of Physical Chemistry B,2003,107(22):5168. |
| [9] | He H;Zhang C B;Yu Y B .A comparative study of Ag/Al2O3and Cu/Al2O3 catalysts for the selective catalytic reduction of NO by C3H6[J].Catalysis Today,2004,90(3-4):191. |
| [10] | Adamowska M;Krzto(n) A;Najbar M;Costa P D Djéga-Mariadassou G .DRIFT study of the interaction of NO and O2with the surface of Ce0.62Zr0 38O2 as deNOx catalyst[J].Catalysis Today,2008,137(2-4):288. |
| [11] | 沈伯雄,郭宾彬,史展亮,吴春飞,梁材.CeO2/ACF的低温SCR烟气脱硝性能研究[J].燃料化学学报,2007(01):125-128. |
| [12] | Kawi S;Tang Y P;Hidajat K;Yu L E .Synthesis and characterization of nanoscale CeO2 catalyst for deNOx[J].Journal of Metastable and Nanocrystalline Materials,2005,23:95. |
| [13] | Wenqing Xu;Yunbo Yu;Changbin Zhang .Selective catalytic reduction of NO by NH3 over a Ce/TiO2 catalyst[J].Catalysis Communications,2008(6):1453-1457. |
| [14] | Yuesong Shen;Shemin Zhu;Tai Qiu .A novel catalyst of CeO2/Al2O3 for selective catalytic reduction of NO by NH3[J].Catalysis Communications,2009(1):20-23. |
| [15] | Steven J. Schmieg;David N. Belton .Effect of hydrothermal aging on oxygen storage/release and activity in a commercial automotive catalyst[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,1995(2):127-144. |
| [16] | Reddy B M;Khan A;Yamada Y;Kobayashi T Loridant S Volta J C .Structural characterization of CeO2-MO2 (M＝Si4+,Ti4+,and Zr4+) mixed oxides by Ranan spectroscopy,X-ray photoelectron spectroscopy,and other techniques[J].Journal of Physical Chemistry B,2003,107(41):11475. |
| [17] | Reddy B M;Khan A .Nanosized CeO2-SiO2,CeO2-TiO2,and CeO2-ZrO2 mixed oxides:influence of supporting oxide on thermal stability and oxygen storage properties of ceda[J].Catalysis Surveys From Asia,2005,9(03):155. |
| [18] | Liu W .Flytzanistephanopoulos M[J].Total oxidation of carbon monoxide and methane over transition metal fluorite oxide composite catalysts:Ⅰ Catalyst composition and activity Journal of Catalysis,1995,153(02):304. |
| [19] | Rcddy B M;Khan A;Yarnada Y;Kobayashi T Loridant S Volta J C .Structural characterization of CeO2-TiO2 and V2O5/CeO2-TiO2 catalysts by Raman and XPS techniques[J].Journal of Physical Chemistry B,2003,107(22):5162. |
| [20] | Reddy BM;Khan A;Lakshmanan P;Aouine M;Loridant S;Volta JC .Structural characterization of nanosized CeO2-SiO2, CeO2-TiO2, and CeO2-ZrO2 catalysts by XRD, raman, and HREM techniques[J].The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical,2005(8):3355-3363. |
| [21] | Gao X;Jiang Y;Zhong Y;Luo Z Y Cen K F .The activity and characterization of CeO2-TiO2 catalysts prepared by the sol-gel mehod for selective catalytic reduction of NO with NH3[J].Journal of Hazardous Materials,2010,174(1-3):734. |
| [22] | Di Monte R;Fornasiero P;Kaspar J;Graziani M .Stabilisation of nanostructured CeO2-ZrO2 solid solutions by addition of Al2O3:a suitable way for production of thermally stable oxygen storage/release promoters for three-way catalysts[J].Studies in Surface Science and Catalysis,2001,140:229. |
| [23] | Kingery W D;Bowen H K;Uhlmann D R.Introduction to Ceramics,second ed[M].New York:John Wiley and Sons,Inc,1976 |
| [24] | Yang J.;Ferreira JMF. .On the titania phase transition by zirconia additive in a sol-gel-derived powder[J].Materials Research Bulletin: An International Journal Reporting Research on Crystal Growth and Materials Preparation and Characterization,1998(3):389-394. |
| [25] | Jung SM.;Grange P. .The investigation of mechanism of SCR reaction on a TiO2-SO42- catalyst by DRIFTS[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2000(1):L11-L16. |
| [26] | XU Haitao,SHEN Yuesong,SHAO Chenghua,LIN Fuwen,ZHU Shemin,QIU Tai.A novel catalyst of silicon cerium complex oxides for selective catalytic reduction of NO by NH3[J].稀土学报（英文版）,2010(05):721-726. |
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%