VOx/SiO2 Catalyst Prepared by Grafting VOCl3 on Silica for Oxidative Dehydrogenation of Propane. Issue 20 (7th September 2015)

• Record Type: Journal Article
• Authors: Zhu, Haibo; Ould‐Chikh, Samy; Dong, Hailin; Llorens, Isabelle; Saih, Youssef; Anjum, Dalaver H.; Hazemann, Jean‐Louis; Basset, Jean‐Marie
• Is Part Of: ChemCatChem. Volume 7:Issue 20(2015:Oct.)
• Page Start: 3332
• Page End: 3339
• Publication Date: 2015-09-07
• Subjects: Catalysis -- Periodicals; 541.39505
• DOI: 10.1002/cctc.201500607
• Languages: English
• ISSNs: 1867-3880

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The VO_{<italic>x</italic>}/SiO₂ catalysts for oxidative dehydrogenation of propane were synthesized by a simple grafting method. The VOCl₃ was first grafted at the surface of SiO₂, 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_{<italic>x</italic>}/SiO₂ catalysts. The synthesized catalysts were characterized by nitrogen adsorption, SEM, Raman spectroscopy, temperature‐programmed reduction, and extended X‐ray absorption fine structure analysis. The SiO₂ pretreatment temperature has an evident effect on the loading and dispersion of VO_{<italic>x</italic>} on SiO₂, which finally affects their catalytic performance. High SiO₂ treatment temperature is beneficial to dispersing the vanadium oxide species at the SiO₂ 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_{<italic>x</italic>}/SiO_2‐(1000) catalyst. The high selectivity and activity are well maintained for three days catalytic reaction.</p> </abstract>