Synthesis, characterisation and catalytic performance of a mesoporous tungsten silicate: W-TUD-1

Authors: Jeroen ten Dam, Dinesh Badloe, Anand Ramanathan, Kristina Djanashvili, Freek Kapteijn, Ulf Hanefeld

Abstract:
Tungsten containing TUD-1 catalysts with Si/W ratios of 10–50 were synthesised by a two-step impregnation method and a direct one-step sol–gel method. The one-step method yielded finely dispersed catalytically active tungsten oxide nano-particles (<1 nm) (at Si/W ratio above 20), while the two-step method yielded both tungsten oxide nano-particles and bulk tungsten oxide. This was established using INAA, N₂ physisorption, powderXRD, Raman spectroscopy, TEM, diffuse reflectance UV–vis, FT-IR, H₂-TPR and NH₃-TPD analysis. Both types of catalyst preparation resulted in active acidic catalysts for the Prins cyclisation of citronellal. It was demonstrated that the finely dispersed tungsten oxide nano-particles were responsible for the catalytic activity.

Keywords:
Tungsten
TUD-1
Mesoporous material
Prins reaction
Acidity

Published in: Applied catalysis A: General   (Volume 468, Pages 1-474, 5 November 2013)

Publisher: Elsevier  

ISSN Information: 0926-860X

Synthesis, characterisation and catalytic performance of a mesoporous tungsten silicate: W-TUD-1

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