کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
63441 | 47688 | 2006 | 11 صفحه PDF | دانلود رایگان |

Flame-made airborne V2O5/TiO2 nanoparticles were deposited directly onto mullite foam supports to create ready-to-use catalysts for the o-xylene conversion to phthalic anhydride. These particles containing 10% (w/w) V2O5 were created by combustion of liquid precursor sprays and characterized by transmission electron microscopy, nitrogen adsorption, X-ray diffraction (XRD), temperature-programmed reduction (TPR), and Raman spectroscopy. The specific surface area, anatase content, and dominantly monomeric vanadia species on titania were thermally stable up to 450 °C. Catalyst structure was controlled in situ during deposition by the particle-laden gas flow rate through the foam, resulting in homogeneous to patchy V2O5/TiO2 coatings. The catalytic activity and selectivity were affected by both coating texture and particle morphology. These flame-coated foams showed superior catalytic activity and selectivity at high conversions than classic, wet-made V2O5/TiO2 catalysts.
Journal: Journal of Catalysis - Volume 243, Issue 1, 1 October 2006, Pages 82–92