Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9610247 | Catalysis Today | 2005 | 6 Pages |
Abstract
The dispersion of tungsten-zirconia, tungsten-titania, boron-zirconia and boron-titania over silica was accomplished by sequentially impregnating Zr and Ti organic compounds and W and B inorganic salts. Supported ZrO2 displayed the highest sintering resistance, crystallizing at 700 °C, while supported TiO2 crystallized at a lower temperature, 550 °C. As a consequence, only supported zirconia could match the range of activation of WOx species (700-800 °C) and a bimodal pattern of activity was found, with maxima at 550 and 750 °C when the W-ZrO2/SiO2 catalyst was used in the isomerization of cis-butene. W-TiO2/SiO2 was fairly inactive.
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Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
V.M. BenÃtez, Carlos R. Vera, C.L. Pieck, F.G. Lacamoire, J.C. Yori, J.M. Grau, J.M. Parera,