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.
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Acknowledgments
This work was performed for clean energy technology development, and was funded by the R&D Management Center for Energy and Resources of Korea Energy Management Corporation. This work was also supported by Priority Research Centers Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2009-0094047).
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Sung, D.M., Kim, Y.H., Park, E.D. et al. Correlation between acidity and catalytic activity for the methanol dehydration over various aluminum oxides. Res Chem Intermed 36, 653–660 (2010). https://doi.org/10.1007/s11164-010-0201-y
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DOI: https://doi.org/10.1007/s11164-010-0201-y