采用活性测试和氮气吸附、X射线衍射、X射线光电子能谱、紫外.可见漫反射吸收光谱、高倍透射电镜、原位漫反射傅里叶变换红外光谱和O2脉冲吸附等研究了铈添加对Ag/Al2O3催化剂低温氨氧化性能的影响.结果表明,适量铈的添加可以明显促进Ag/A12O3催化剂的低温氨氧化活性,且对催化剂的选择性影响不大.添加铈不仅可以促进Ag/Al2O3催化剂表面吸附和活化O2的能力,而且可促进催化剂表面对氨的解离吸附和活化.这是铈促进Ag/Al2O3催化剂低温氨氧化活性的主要原因.
The effects of adding CeO2 to Ag/Al2O3 on the selective catalytic oxidation of ammonia to nitrogen were investigated by activity test and N2 physisorption, X-ray diffraction, X-ray photoelectron spectroscopy, UV-Vis diffuse-reflectance spectroscopy, high resolution transmission electron microscopy, in situ diffuse reflectance infrared Fourier transform spectroscopy of NH3 adsorption, and O2-pulse adsorption. Adding a suitable amount of CeO2 improved the catalytic activity of Ag/Al2O3 for NH3 oxidation at temperatures below 160 ℃, and slightly influenced N2 selectivity by improving the catalyst's ability to adsorb and activate O2 and the adsorption and activation of NH3.
参考文献
| [1] | Gang L;Anderson B G;van Grondelle J;van Santen R A .[J].Catalysis Today,2000,61:179. |
| [2] | Lin S D;Gluhoi A C;Nieuwenhuys B E .[J].Catalysis Today,2004,90:3. |
| [3] | Lippits M J;Gluhoi A C;Nieuwenhuys B E .[J].Catalysis Today,2008,137:446. |
| [4] | Gang L;Anderson B G;van Grondelle J;van Santen R A,van Gennip W J H,Niemantsverdriet J W,Kooyman P J,Knoester A,Brongersma HH .[J].Journal of Catalysis,2002,206:60. |
| [5] | 贺泓,余运波,李毅,吴强,张秀丽,张长斌,石晓燕,宋小萍.Ag/Al2O3催化剂催化含氧烃类选择性还原氮氧化物的基础与应用研究进展[J].催化学报,2010(05):491-501. |
| [6] | Gang L;Anderson B G;van Grondelle J;van Santen R A .[J].Appl Catal 5,2003,40:101. |
| [7] | Zhang L;Zhang CB;He H .The role of silver species on Ag/Al2O3 catalysts for the selective catalytic oxidation of ammonia to nitrogen[J].Journal of Catalysis,2009(1):101-109. |
| [8] | Gang L;Anderson B G;van Grondelle J;van Santen RA .[J].Journal of Catalysis,2001,199:107. |
| [9] | Bogdanchikova N;Meunier F C;Avalos-Borja M;Breen J P Pestryakov A .[J].Applied Catalysis B:Environmental,2002,36:287. |
| [10] | Sato K;Yoshinari T;Kintaichi Y;Haneda M Hamada H .[J].Applied Catalysis B:Environmental,2003,44:67. |
| [11] | Keshavaraja A;She X;Flytzani-Stephanopoulos M .[J].Applied Catalysis B:Environmental,2000,27:L1. |
| [12] | She X;Flytzani-Stephanopoulos M .[J].Journal of Catalysis,2006,237:79. |
| [13] | Shimizu K;Tsuzuki M;Kato K;Yokota S Okumura K Satsuma A .[J].Journal of Physical Chemistry C,2007,111:950. |
| [14] | Hoost T E;Kudla R J;Collins K M;Chattha M S .[J].Applied Catalysis B:Environmental,1997,13:59. |
| [15] | Kundakovic L;Flytzani-Stephanopoulos M .[J].Applied Catalysis A:General,1999,183:35. |
| [16] | Bensalem A.;Delamar M.;Bugli G.;Bozonverduraz F. .PREPARATION AND CHARACTERIZATION OF HIGHLY DISPERSED SILICA-SUPPORTED CERIA[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,1995(1):81-93. |
| [17] | Si R;Zhang Y W;Li S J;Lin B X Yan C H .[J].Journal of Physical Chemistry B,2004,108:12481. |
| [18] | Timofeeva MN;Jhung SH;Hwang YK;Kim DK;Panchenko VN;MeIgunov MS;Chesalov YA;Chang JS .Ce-silica mesoporous SBA-15-type materials for oxidative catalysis: Synthesis, characterization, and catalytic application[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2007(1):1-10. |
| [19] | Ferriz RM.;Gorte RJ.;Vohs JM. .TPD and XPS investigation of the interaction of SO2 with model ceria catalysts[J].Catalysis Letters,2002(1/2):123-129. |
| [20] | Liotta LF;Di Carlo G;Pantaleo G;Venezia AM;Deganello G .Co3O4/CeO2 composite oxides for methane emissions abatement: Relationship between Co3O4-CeO2 interaction and catalytic activity[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2006(3/4):217-227. |
| [21] | Zhao M;Shen M;Wen X;Wang J .[J].Journal of Alloys and Compounds,2008,457:578. |
| [22] | Lu J;Bravo-Suarez J J;Haruta M;Oyama S T .[J].Applied Catalysis A:General,2006,302:283. |
| [23] | Amblard M;Burch R;Southward B W L .[J].Catalysis Today,2000,59:365. |
| [24] | Larrubia M A;Ramis G;Busca G .[J].Applied Catalysis B:Environmental,2001,30:101. |
| [25] | Ramis G;Larrubia M A;Busca G .[J].Topics in Catalysis,2000,11:161. |
| [26] | Kijlstra WS.;Poels EK.;Bliek A.;Brands DS. .MECHANISM OF THE SELECTIVE CATALYTIC REDUCTION OF NO BY NH3 OVER MNOX/AL2O3 .1. ADSORPTION AND DESORPTION OF THE SINGLE REACTION COMPONENTS[J].Journal of Catalysis,1997(1):208-218. |
| [27] | Zou H.;Shen JY. .Microcalorimetric and infrared spectroscopic studies of gamma-Al2O3 modified by zinc oxide[J].Thermochimica Acta: An International Journal Concerned with the Broader Aspects of Thermochemistry and Its Applications to Chemical Problems,2000(1/2):165-170. |
| [28] | Amores J M G;Escribano V S;Ramis G;Busca G .[J].Applied Catalysis B:Environmental,1997,13:45. |
| [29] | Ramis G;Yi L;Busca G;Turco M Kotur E Willey R J .[J].Journal of Catalysis,1995,157:523. |
| [30] | Zhang, L.;He, H. .Mechanism of selective catalytic oxidation of ammonia to nitrogen over Ag/Al_2O_3[J].Journal of Catalysis,2009(1):18-25. |
| [31] | Lefferts L;van Ommen J G;Ross J R H .[J].Applied Catalysis A:General,1987,31:291. |
| [32] | Li C;Domen K;Maruya K;Onishi T .[J].Journal of the American Chemical Society,1989,111:7683. |
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%