点击次数：

发布时间：2019-03-09

论文类型：期刊论文

发表时间：2013-12-01

发表刊物：TOPICS IN CATALYSIS

收录刊物：Scopus、EI、SCIE

卷号：56

期号：18-20,SI

页面范围：1724-1730

ISSN号：1022-5528

关键字：Ethylbenzene; Styrene; Dehydrogenation; CO2

摘要：Utilization of CO2 as a soft oxidant in the oxidative dehydrogenation of ethylbenzene to styrene, a remarkable V2O5-Sb2O5-CeO2/TiO2-ZrO2 catalyst has been accomplished. Preparation of TiO2-ZrO2 support by co-precipitation followed by a single step deposition of V and Ce and Sb as stabilizers yielded a highly active and selective catalyst. Acid-base and redox properties including sustained stability of active species (V5+) are responsible for high activity of V2O5-Sb2O5-CeO2/TiO2-ZrO2 catalyst. The redox cycle is related to the dispersed V5+ and lattice reduced vanadium site in the VSbO4 phase. The antimony oxide inhibits the easy redox cycle between different vanadia species.