Deep Oxidation of Ethanol over SiO2 Supported MoV Heteropoly Acids Modified with Palladium.

0497643 - ÚCHP 2019 RIV NL eng J - Journal Article
Jirátová, Květa - Spojakina, A. - Balabánová, Jana - Palcheva, R. - Tyuliev, G. - Karakirova, Y.
Deep Oxidation of Ethanol over SiO2 Supported MoV Heteropoly Acids Modified with Palladium.
Reaction Kinetics Mechanism and Catalysis. Roč. 125, č. 2 (2018), s. 901-922. ISSN 1878-5190. E-ISSN 1878-5204
R&D Projects: GA ČR GA17-08389S
Institutional support: RVO:67985858
Keywords : MoV heteropolyacids * deep ethanol oxidation * palladium
OECD category: Chemical process engineering
Impact factor: 1.428, year: 2018

Silica-supported catalysts with Mo (MoV) heteropoly acids (HPAs) and their palladium-modified analogs were prepared and applied in deep oxidation of ethanol. The catalysts were characterized by elemental analysis MP-AES, nitrogen physisorption, FTIR, DR UV–vis spectroscopy, ESR, H2-TPR, NH3-TPD, and X-ray photoelectron spectroscopies. In the oxidation of ethanol, the supported MoV (Pd/ MoV) catalysts were as active as common transition metal oxide catalysts (at space velocity 20 l g-1 h-1, the T50 temperature varied in the range from 126 to 179 C). The Pd-modified Mo (MoV) catalysts showed slightly higher activity than the nonmodified ones, but substantially improved selectivity towards the formation of undesirable reaction byproducts: formation of CH3CHO was decreased and CO was not formed at all. Thus, Pd/HPA/SiO2 materials, with their optimum acidity and high oxidation/reduction abilityare promising catalysts for the deep oxidation of alcohols.
Permanent Link: http://hdl.handle.net/11104/0294054