Correlation between acidity and catalytic activity for the methanol dehydration over various aluminum oxides

Correlation between acidity and catalytic activity for the methanol dehydration over various... Dehydration of methanol into dimethyl ether (DME) was carried out over aluminum oxides with different crystalline phases, viz. η-Al2O3, γ-Al2O3, θ-Al2O3, (χ + γ)-Al2O3, δ-Al2O3, α-Al2O3, and κ-Al2O3. The catalytic activity decreased in the following order: η-Al2O3 > γ-Al2O3 ≫ θ-Al2O3 ≫ (χ + γ)-Al2O3 ≫ δ-Al2O3 > α-Al2O3 ≈ κ-Al2O3. Several techniques: N2 physisorption, X-ray diffraction (XRD), temperature-programmed desorption (TPD) of NH3, and FT-IR spectroscopy after pyridine adsorption were employed to characterize these solid acid catalysts. The good correlation can be found between the catalytic activity and the amount of Lewis acid site determined by the FT-IR spectra after pyridine adsorption. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Correlation between acidity and catalytic activity for the methanol dehydration over various aluminum oxides

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Publisher
Springer Netherlands
Copyright
Copyright © 2010 by Springer Science+Business Media B.V.
Subject
Chemistry; Inorganic Chemistry ; Physical Chemistry ; Catalysis
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-010-0201-y
Publisher site
See Article on Publisher Site

Abstract

Dehydration of methanol into dimethyl ether (DME) was carried out over aluminum oxides with different crystalline phases, viz. η-Al2O3, γ-Al2O3, θ-Al2O3, (χ + γ)-Al2O3, δ-Al2O3, α-Al2O3, and κ-Al2O3. The catalytic activity decreased in the following order: η-Al2O3 > γ-Al2O3 ≫ θ-Al2O3 ≫ (χ + γ)-Al2O3 ≫ δ-Al2O3 > α-Al2O3 ≈ κ-Al2O3. Several techniques: N2 physisorption, X-ray diffraction (XRD), temperature-programmed desorption (TPD) of NH3, and FT-IR spectroscopy after pyridine adsorption were employed to characterize these solid acid catalysts. The good correlation can be found between the catalytic activity and the amount of Lewis acid site determined by the FT-IR spectra after pyridine adsorption.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Sep 18, 2010

References

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