用溶胶-凝胶法以磷钼酸(MPA)的铜盐溶液水解钛酸四丁酯制备了CuPMo/TiO2催化剂,并用ICP,XRD,TG-DTA,IR,TPD-MS和微反技术研究了催化剂的化学组成、热稳定性、化学吸附性质和催化性能. 结果表明: 杂多钼酸盐与TiO2表面通过O2-桥发生键联. 在623 K下,杂多阴离子仍保持其原有的Keggin结构; CO2在Lewis酸位Cu(Ⅱ)和Lewis碱位Cu-O-Mo桥氧的协同作用下形成卧式吸附态Cu(Ⅱ)←O-(CO)←(O--Cu); 丙烯以分子吸附态在催化剂上吸附; 在空速1 500 h-1,压力1 Mpa和温度563 K的反应条件下,丙烯的转化率为4.2%,甲基丙烯酸的选择性为96%.
参考文献
| [1] | Tsigdinos G A .[J].Industrial & Engineering Chemistry Process Design and Development,1974,13(04):267. |
| [2] | Misono M .[J].Catalysis Review-Science and Engineering,1987(29):269. |
| [3] | Bardin B B;Davis R J .[J].Applied Catalysis A:General,1999,185:287. |
| [4] | Damyanova S;Cubeiro M L;Fierro J L G .[J].Journal of Molecular Catalysis A:Chemical,1999,142(01):85. |
| [5] | Chary K V R;Reddy K R;Kumar C P .[J].Catalysis Communications,2001,2(09):279. |
| [6] | Rocchiccioli-Deltcheff C;Aouissi A;Launay S;Fournier M .[J].Journal of Molecular Catalysis A:Chemical,1996,114(1-3):331. |
| [7] | Li DF.;Guo YH.;Hu CW.;Mao L.;Wang E. .Photocatalytic degradation of aqueous formic acid over the silica composite films based on lacunary Keggin-type polyoxometalates[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2002(1/2):11-20. |
| [8] | Schroden R C;Blanford C F;Melde B J;Johnson B J S,Stein A .[J].CHEMISTRY OF MATERIALS,2001,13(03):1074. |
| [9] | Borshch SA.;Millet JMM.;Duclusaud H. .Effect of iron counter-ions on the reducibility of the Keggin type molybdophosphoric heteropolyacid Part II. A theoretical study[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2000(1/2):103-108. |
| [10] | Langpape M.;Millet JMM. .Effect of iron counter-ions on the redox properties of the Keggin-type molybdophosphoric heteropolyacid Part I. An experimental study on isobutane oxidation catalysts[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2000(1/2):89-101. |
| [11] | Turek A M;Wachs I E;DeCanio E .[J].Journal of Physical Chemistry,1992,96(12):5000. |
| [12] | 钟顺和,黎汉生,王建伟.CO2在Cu-Ni/MoO3-SiO2催化剂上的吸附与反应[J].燃料化学学报,1999(04):305-308. |
| [13] | Seiferth O;Wolter K;Dillmann B;Klivenyi G Freund H-J Scarano D Zecchina A .[J].Surface Science Spectra,1999,421:176. |
| [14] | 邢其毅.基础有机化学[M].北京:高等教育出版社,2001:360. |
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