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Catalysts 2017, 7(3), 95; doi:10.3390/catal7030095

Highly Selective Solid Acid Catalyst H1−xTi2(PO4)3−x(SO4)x for Non-Oxidative Dehydrogenation of Methanol and Ethanol

1
Laboratory of Chemical Technology and Catalysis, Department of Organic Chemistry, Biochemistry & Catalysis, Faculty of Chemistry, University of Bucharest, 4-12, Blv. Regina Elisabeta, 030018 Bucharest, Romania
2
School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA
*
Authors to whom correspondence should be addressed.
Academic Editors: Benoît Louis, Qiang Wang and Marcelo Maciel Pereira
Received: 21 February 2017 / Revised: 13 March 2017 / Accepted: 16 March 2017 / Published: 22 March 2017
View Full-Text   |   Download PDF [5225 KB, uploaded 22 March 2017]   |  

Abstract

The conversion of alcohols towards aldehydes in the presence of catalysts by non-oxidative dehydrogenation requires special importance from the perspective of green chemistry. Sodium (Na) super ionic conductor (NASICON)-type hydrogen titanium phosphate sulfate (HTPS; H1−xTi2(PO4)3−x(SO4)x, x = 0.5–1) catalysts were synthesized by the sol-gel method, characterized by N2 gas sorption, X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), NH3 temperature-programmed desorption (NH3-TPD), ultraviolet–visible (UV-VIS) spectroscopy, and their catalytic properties were studied for the non-oxidative dehydrogenation of methanol and ethanol. The ethanol is more reactive than methanol, with the conversion for ethanol exceeding 95% as compared to methanol, where the conversion has a maximum value at 55%. The selectivity to formaldehyde is almost 100% in methanol conversion, while the selectivity to acetaldehyde decreases from 56% to 43% in ethanol conversion, when the reaction temperature is increased from 250 to 400 °C. View Full-Text
Keywords: methanol; ethanol; dehydrogenation; hydrogen titanium phosphate sulfate methanol; ethanol; dehydrogenation; hydrogen titanium phosphate sulfate
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Mitran, G.; Mieritz, D.G.; Seo, D.-K. Highly Selective Solid Acid Catalyst H1−xTi2(PO4)3−x(SO4)x for Non-Oxidative Dehydrogenation of Methanol and Ethanol. Catalysts 2017, 7, 95.

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