Abstract
The interaction of ethylene glycol with the surface of Ag-containing catalysts modified with phosphates was studied by IR spectroscopy. It was found that ethylene glycol was adsorbed at the surface phosphate groups; the presence of water vapor increased the stability of adsorbed ethylene glycol to a temperature of 400°C. A study of the kinetics of oxidation of ethylene glycol showed that it was consecutively converted into glycolaldehyde and glyoxal at 400°C. At 500–550°C, glyoxal was formed upon both the consecutive and direct conversion of ethylene glycol. The presence of a stage of the consecutive conversion of ethylene glycol into glycolaldehyde and glyoxal was caused by the participation of surface phosphate groups in the adsorption of alcohol molecules to be oxidized.
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Original Russian Text © G.V. Mamontov, A.S. Knyazev, E.A. Paukshtis, O.V. Vodyankina, 2013, published in Kinetika i Kataliz, 2013, Vol. 54, No. 6, pp. 776–785.
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Mamontov, G.V., Knyazev, A.S., Paukshtis, E.A. et al. Adsorption and conversion of ethylene glycol on the surface of Ag-containing catalyst modified with phosphate. Kinet Catal 54, 735–743 (2013). https://doi.org/10.1134/S0023158413060086
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DOI: https://doi.org/10.1134/S0023158413060086