Abstract
The catalytic properties of the nanocomposites were evaluated at various
temperatures during the gas-phase dehydration of glycerol, an
environmental friendly reaction. A pressure of 1 atm and a
glycerol/water molar ratio of 0.25 were applied. Nanocomposites
possessing high surface area were synthesised, and silica-containing
CeO2-MnO2, NiO-Al2O3 and CeO2-Al2O3 nanoparticles were obtained. The
materials were characterised by XRD, Raman spectroscopy, TPR, TEM and
SEM-EDX analysis, and the textural properties of the materials were
determined. The effect of the structure, surface properties and textural
parameters was evident in the unique properties of the nanoparticles,
and the accessibility of the active sites dictated the catalytic
activity. The basicity and reducibility of the nanoparticles on silica
plays a critical role in the catalytic properties of the oxides. (C)
2012 Elsevier B.V. All rights reserved.
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