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Title: Ternary Ag/MgO-SiO2 Catalysts for the Conversion of Ethanol into Butadiene
Authors: Janssens, Wout ×
Makshina, Ekaterina
Vanelderen, Pieter
De Clippel, Filip
Houthoofd, Kristof
Kerkhofs, Stef
Martens, Johan
Jacobs, Pierre
Sels, Bert #
Issue Date: Mar-2015
Publisher: Wiley - V C H Verlag GmbH & Co. KGaA
Series Title: ChemSusChem: Chemistry & Sustainability, Energy & Materials vol:8 issue:6 pages:994-1008
Article number: 10.1002/cssc.201402894
Abstract: Ternary Ag/Magnesia-silica catalysts were tested in the direct synthesis of 1,3-butadiene from ethanol. The influence of the silver content and the type of silica source on catalytic performance has been studied. Prepared catalysts were characterized by (29) Si NMR, N2 sorption, small-angle X-ray scattering measurements, XRD, environmental scanning electron microscopy with energy dispersive X-ray analysis (ESEM/EDX), FTIR spectroscopy of adsorbed pyridine and CO2 , temperature-programmed desorption of CO2 and UV/Vis diffuse reflectance spectroscopy. Based on these characterization results, the catalytic performance of the catalysts in the 1,3-butadiene formation process was interpreted and a tentative model explaining the role of the different catalytically active sites was elaborated. The balance of the active sites is crucial to obtain an active and selective catalyst to form 1,3-butadiene from ethanol. The optimal silver loading is 1-2 wt % on a MgO-silica support with a molar Mg/Si ratio of 2. The silver species and basic sites (MgO pairs and basic OH groups) are of prime importance in the 1,3-butadiene production, catalyzing mainly the ethanol dehydrogenation and the aldol condensation, respectively.
Description: 'high-light' in "the catalyst review, vol. 27, issue 12, pg. 15"
URI: 
ISSN: 1864-5631
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Centre for Surface Chemistry and Catalysis
× corresponding author
# (joint) last author

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