考察了In/SO42-/TiO2(In/STi)催化剂上甲烷选择性催化还原(CH4-SCR)NOx的活性,分析了硫酸化对催化活性的促进作用.结果表明,硫酸化影响了In在催化剂表面的存在形态和CH4的活化产物,从而提高了催化剂活性.吡啶红外光谱分析表明,硫酸化后的STi载体可提供足够强度的B酸位,有利于活性中心InO+物种的形成.原位红外光谱分析表明,In/TiO2催化剂上CH4的活化产物为完全氧化的CO2和H2O,而硫酸化后的In/STi催化剂上CH4的活化产物为HCOO-,该物种被认为是CH4-SCR反应的重要中间体,它的生成为In/STi催化剂上CH4-SCR反应的速控步骤.
参考文献
| [1] | 李宁,王爱琴,郑明远,王晓东,张涛.Pd/硫酸化氧化铝--一种新型甲烷选择还原NO催化剂[J].催化学报,2003(11):809-810. |
| [2] | Yang D;Li J H;Wen M F;Song C L .[J].Catalysis Communications,2007,8:2243. |
| [3] | Shi Y;Pan H;Zhang Y T;li W .[J].Catalysis Communications,2008,9:796. |
| [4] | Bautista P;Faraldos M;Yates M;Bahamonde A .Influence of sulphate doping on Pd/zirconia based catalysts for the selective catalytic reduction of nitrogen oxides with methane[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2007(3/4):254-261. |
| [5] | Kantcheva M;Vakkasoglu A S .[J].Journal of Catalysis,2004,223:364. |
| [6] | Cordoba L F;Sachtler W M H;de Correa C M .[J].Applied Catalysis B:Environmental,2005,56:269. |
| [7] | Li N;Wang A Q;Liu Z M;Wang X D Zheng M Y Huang Y Q Zhang T .[J].Applied Catalysis B:Environmental,2006,62:292. |
| [8] | Ohtsuka H .[J].Applied Catalysis B:Environmental,2001,33:325. |
| [9] | Suprun W;Schaedlich K;Papp H .SCR of NO on sulfated zirconium oxides in the presence of methane[J].Chemical Engineering & Technology: Industrial Chemistry -Plant Equipment -Process Engineering -Biotechnology,2005(2):199-203. |
| [10] | Feeley J S;Deeba M;Farrauto R J;Beri G Haynes A .[J].Applied Catalysis B:Environmental,1995,6:79. |
| [11] | Kantcheva, M;Cayirtepe, I .FT-IR spectroscopic investigation of the surface reaction of CH4 with NOx species adsorbed on Pd/WO3-ZrO2 catalyst[J].Catalysis Letters,2007(3/4):148-162. |
| [12] | Xu S C;Li J H;Yang D;Hao J M .[J].Journal of Physical Chemistry C,2008,112:16052. |
| [13] | Loughran C J;Resasco D E .[J].Applied Catalysis B:Environmental,1995,7:113. |
| [14] | Quincoces C E;Guerrero S;Araya P;Gonzalez M G .[J].Catalysis Communications,2005,6:75. |
| [15] | Okumura K;Kusakabe T;Niwa M .[J].Applied Catalysis B:Environmental,2003,41:137. |
| [16] | Kantcheva M;Cayirtepe I .[J].Journal of Molecular Catalysis A:Chemical,2006,247:88. |
| [17] | 17 Arata K;Hino M .[J].Materials Chemistry and Physics,1990,26:213. |
| [18] | Yang D;Li J H;Wen M F;Song C L .[J].Catalysis Letters,2008,122:138. |
| [19] | Lercher J A;Grundling C;Eder-Mirth G .[J].Catalysis Today,1996,27:353. |
| [20] | Ogura M;Hayashi M;Kikuchi E .[J].Catalysis Today,1998,45:139. |
| [21] | Kikuchi E.;Terasaki I.;Goto Y.;Ogura M. .SELECTIVE REDUCTION OF NITRIC OXIDE WITH METHANE ON GALLIUM AND INDIUM CONTAINING H-ZSM-5 CATALYSTS - FORMATION OF ACTIVE SITES BY SOLID-STATE ION EXCHANGE[J].Journal of Catalysis,1996(1):465-470. |
| [22] | Bobricheva IV.;Yermolaev VK.;Kotsarenko NS.;Shmachkova VP.;Kochubey DI.;Stavitsky IA. .ESR study of paramagnetic sites in sulfated zirconia[J].Catalysis Letters,1998(1):23-27. |
| [23] | Kuba S.;Grasselli RK.;Gates BC.;Che M.;Knozinger H.;Heydorn PC. .Redox properties of tungstated zirconia catalysts: Relevance to the activation of n-alkanes[J].Physical chemistry chemical physics: PCCP,2001(1):146-154. |
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%