采用CO和H2脉冲吸附、程序升温还原、NH3程序升温脱附及X射线衍射等手段对各金属氧化物改性的Pt/Al2O3催化剂进行了表征,研究了助剂形态对Pt/Al2O3催化剂在非临氢条件下催化环己烷脱氢反应性能的影响.结果表明,催化剂稳定性从高到低依次为Zr-Pt/Al2O3＞ Ca-Pt/Al2O3＞ Ce-Pt/Al2O3＞ Zn-Pt/A12O3＞ Ba-Pt/Al2O3.加入的助剂通过增加Pt分散度和促进氢溢流来增加催化剂的抗积炭性能,因此助剂需具有较高的热稳定性和化学稳定性,在催化剂的焙烧过程中以氧化物形态均匀分散在载体表面,不能过度聚集、或与载体反应生成铝酸盐、或与活性金属反应形成合金.Ca和La同时改性的催化剂性能不如单一助剂,因为助剂间相互作用导致催化剂酸中心增强,溢流氢能力减弱.
参考文献
| [1] | Hodoshima S;Arai H;Saito Y .[J].International Journal of Hydrogen Energy,2003,28:197. |
| [2] | Newson E;Haueter T;Hottinger P;Von Roth F Scherer G W H Schucan T H .[J].International Journal of Hydrogen Energy,1998,23:905. |
| [3] | Scherer G W H;Newson E;Wokaun A .[J].International Journal of Hydrogen Energy,1999,24:1157. |
| [4] | Zheng W Q;Zhang J;Zhu B;Blume R Zhang Y L Schlichte K Schl(o)gl R Schüth F Su D S .[J].Chemistry Sustainable Chemistry,2010,3:226. |
| [5] | Schlapbach L .[J].Nature,2009,460:809. |
| [6] | 何松波,赖玉龙,毕文君,杨旭,荣欣,孙承林.K助剂对Pt-Sn-K/γ-Al_2O_3催化剂上C_（16）正构烷烃脱氢反应的影响[J].催化学报,2010(04):435-440. |
| [7] | Sun P P;Siddiqi G;Chi M F;Bell A T .[J].Journal of Catalysis,2010,274:192. |
| [8] | Siddiqi, G.;Sun, P.;Galvita, V.;Bell, A.T. .Catalyst performance of novel Pt/Mg(Ga)(Al)O catalysts for alkane dehydrogenation[J].Journal of Catalysis,2010(2):200-206. |
| [9] | Tasbihi M;Feyzi F;Amlashi M A;Abdullah A Z Mohamed A R .[J].Fuel Processing Technology,2007,88:883. |
| [10] | Galvita, V.;Siddiqi, G.;Sun, P.;Bell, A.T. .Ethane dehydrogenation on Pt/Mg(Al)O and PtSn/Mg(Al)O catalysts[J].Journal of Catalysis,2010(2):209-219. |
| [11] | 李晓芸,马丁,包信和.不同活性炭上Pt催化剂的分散性及其在甲基环己烷脱氢反应中的催化性能[J].催化学报,2008(03):259-263. |
| [12] | Kariya N.;Fukuoka A.;Utagawa T.;Sakuramoto M.;Goto Y.;Ichikawa M. .Efficient hydrogen production using cyclohexane and decalin by pulse-spray mode reactor with Pt catalysts[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2003(2):247-259. |
| [13] | Biniwale RB;Ichikawa M .Thermal imaging of catalyst surface during catalytic dehydrogenation of cyclohexane under spray-pulsed conditions[J].Chemical Engineering Science,2007(24):7370-7377. |
| [14] | Biniwale R B;Kariya N;Yamashiro H;Ichikawa M .[J].Journal of Physical Chemistry B,2006,110:3189. |
| [15] | Park YK.;Somorjai GA.;Ribeiro FH. .The effect of potassium and tin on the hydrogenation of ethylene and dehydrogenation of cyclohexane over Pt(111)[J].Journal of Catalysis,1998(1):66-75. |
| [16] | Radwan AM.;Tomita A.;Kyotani T. .Characterization of coke deposited from cracking of benzene over USY zeolite catalyst[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2000(1):43-50. |
| [17] | Salmones J;Wang J A;Galicia J A;Aguilar-Rios G .[J].Journal of Molecular Catalysis A:Chemical,2002,184:203. |
| [18] | Yu J F;Ge Q J;Fang W;Xu H Y .[J].Applied Catalysis A:General,2011,395:114. |
| [19] | Yu C L;Ge Q J;Xu H Y;Li W Zh .[J].Catalysis Letters,2006,112:197. |
| [20] | Luo JY;Meng M;Zha YQ;Xie YN;Hu TD;Zhang J;Liu T .A comparative study of Pt/Ba/Al2O3 and Pt/Fe-Ba/Al2O3 NSR catalysts: New insights into the interaction of Pt-Ba and the function of Fe[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2008(1/2):38-52. |
| [21] | Yu CL;Ge QJ;Xu HY;Li WZ .Effects of Ce addition on the Pt-Sn/gamma-Al2O3 catalyst for propane dehydrogenation to propylene[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2006(0):58-67. |
| [22] | Wang D;Ammari F;Touroude R;Su D S Schl(o)gl R .[J].Catalysis Today,2009,147:224. |
| [23] | Pajonk G.M. .Contribution of spillover effects to heterogeneous catalysis[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2000(2):157-169. |
| [24] | Perrichon V;Retailleau L;Bazin P;Daturi M Lavalley J C .[J].Applied Catalysis A:General,2004,260:1. |
| [25] | Conner W C;Falconer J L .[J].Chemical Reviews,1995,95:759. |
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%