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VO x/SiO2 Catalyst Prepared by Grafting VOCl3 on Silica for Oxidative Dehydrogenation of Propane.
- Source :
- ChemCatChem; Oct2015, Vol. 7 Issue 20, p3332-3339, 8p
- Publication Year :
- 2015
-
Abstract
- The VO<subscript> x</subscript>/SiO<subscript>2</subscript> catalysts for oxidative dehydrogenation of propane were synthesized by a simple grafting method. The VOCl<subscript>3</subscript> was first grafted at the surface of SiO<subscript>2</subscript>, which was dehydrated at different temperature (from 200 to 1000 °C). The formed grafted complexes were then calcined in air, leading to the formation of VO<subscript> x</subscript>/SiO<subscript>2</subscript> catalysts. The synthesized catalysts were characterized by nitrogen adsorption, SEM, Raman spectroscopy, temperature-programmed reduction, and extended X-ray absorption fine structure analysis. The SiO<subscript>2</subscript> pretreatment temperature has an evident effect on the loading and dispersion of VO<subscript> x</subscript> on SiO<subscript>2</subscript>, which finally affects their catalytic performance. High SiO<subscript>2</subscript> treatment temperature is beneficial to dispersing the vanadium oxide species at the SiO<subscript>2</subscript> surface. These materials are efficient catalysts for the catalytic oxidative dehydrogenation of propane to propylene. The best selectivity to propylene is achieved on the VO<subscript> x</subscript>/SiO<subscript>2-(1000)</subscript> catalyst. The high selectivity and activity are well maintained for three days catalytic reaction. [ABSTRACT FROM AUTHOR]
- Subjects :
- CATALYSTS
CATALYSIS
PROPENE
SILICA
OXIDATIVE dehydrogenation
RAMAN spectroscopy
Subjects
Details
- Language :
- English
- ISSN :
- 18673880
- Volume :
- 7
- Issue :
- 20
- Database :
- Complementary Index
- Journal :
- ChemCatChem
- Publication Type :
- Academic Journal
- Accession number :
- 110280465
- Full Text :
- https://doi.org/10.1002/cctc.201500607