Fundamental and combinatorial approaches in the search for and optimisation of catalytic materials for the oxidative dehydrogenation of propane to propene
Fundamental and combinatorial approaches in the search for and optimisation of catalytic materials for the oxidative dehydrogenation of propane to propene
复制标题
丙烷氧化脱氢制丙烯催化材料的寻找和优化的基本和组合方法
DOI：
10.1016/s0920-5861(01)00329-7
复制
发表时间：
2001
期刊：
影响因子：
5.3
通讯作者：
M. Baerns
中科院分区：
文献类型：
--
作者：
O. Buyevskaya;A. Brückner;E. Kondratenko;D. Wolf;M. Baerns
An evolutionary approach was applied to create five generations of α-Al2O3-supported multi-metal-oxides to be used as catalytic materials for the oxidative dehydrogenation of propane at 773K. Each generation consisted of 56 differently composed materials, i.e., a total amount of 280 materials. These catalytic materials were tested in parallel. For the best materials propene yields from 7% (1st generation) to 9% (5th generation) were achieved. Some of these superior catalysts were characterised by XRD, XPS and EPR. A correlation between catalytic performance and the Mg/V ratio on the surface was found. Based on the structural knowledge obtained, from which the requirement of isolated or at least weakly interacting vanadium sites was derived, VOx(2.8wt.%)/MCM-48 and VOx(2.8wt.%)/MCM-41 catalysts with a high dispersion of vanadia were used as reference giving a maximal propene yield of 17 and 15%, respectively.
