Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2013-12-01

Journal: TOPICS IN CATALYSIS

Included Journals: Scopus、EI、SCIE

Volume: 56

Issue: 18-20,SI

Page Number: 1724-1730

ISSN: 1022-5528

Key Words: Ethylbenzene; Styrene; Dehydrogenation; CO2

Abstract: 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.