期刊
JOURNAL OF CATALYSIS
卷 276, 期 1, 页码 76-84出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2010.09.002
关键词
Propylene; Epoxidation; Molecular oxygen; Copper catalyst; Vanadium
资金
- National Natural Science Foundation of China [20773099, 20625310, 20923004]
- National Basic Research Program of China [2010CB732303]
- Research Fund for the Doctoral Program of High Education [20090121110007]
- Key Scientific Project of Fujian Province [2009HZ0002-1]
The modification of copper by vanadium significantly enhanced its catalytic performance of propylene epoxidation by oxygen Synergistic effects existed between copper and vanadium and the catalysts with V/Cu atomic ratios of 0 11-0 20 exhibited better propylene oxide (PO) formation activity The dispersion of copper was enhanced by vanadium and this might contribute to the Increase in catalytic activity The pre-reduction of catalyst resulted in better performances than the oxidative pretreatment and an induction period was observed for PO formation over the reduced catalyst In situ XRD measurements revealed that Cu-0 in the reduced catalyst was partially transformed into Cu2O in propylene oxidation and the presence of VOx promoted this transformation Structure-performance correlations demonstrate that Cu-1 accounts for propylene epoxidation Vanadium species at lower valence states (V-III and V-IV) may participate in the activation of oxygen The presence of VOx also suppressed the reactivity of lattice oxygen in the working catalyst (C) 2010 Elsevier Inc All rights reserved
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据