The study on the source of Te and the dispersion of TeO2 in fabricating Mo–V–Te and Mo–V–Te–Nb mixed metal oxide catalysts for propane partial oxidation

✍ Scribed by Ru-Ming Feng; Xiu-Juan Yang; Wei-Jie Ji; Hai-Yang Zhu; Xiao-Dong Gu; Yi Chen; Scott Han; Hartmut Hibst

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 960 KB
• Volume: 267
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/j.molcata.2006.11.047

✦ Synopsis

The effects of the source of Te and the dispersion of TeO 2 on fabricating Mo-V-Te and Mo-V-Te-Nb mixed metal oxide (MMO) catalysts for propane partial oxidation to acrylic acid (AA) were systematically studied. In order to modify the dispersion of TeO 2 in the preparation medium, wet-milling and ultrasonic-assisted dispersion of TeO 2 were adopted. The selected samples were characterized by means of BET, XRD, ICP/XRF, XPS, SEM, H 2 -and C 3 H 8 -TPR and calorimetric NH 3 adsorption. It was clearly demonstrated that different sources of Te and dispersion of TeO 2 in preparation showed significant impact on the physicochemical properties (phase composition, bulk/surface elemental concentration, reactivity of lattice oxygen, and surface acidity) and catalytic activity of the MMO catalysts. The employment of ultrasonic treatment was proved to be effective for making more active and selective Mo-V-Te/Mo-V-Te-Nb catalysts for the target action.