Adsorption and conversion of ethylene glycol on the surface of Ag-containing catalyst modified with phosphate

作者：Mamontov G V^*; Knyazev A S; Paukshtis E A; Vodyankina O V

来源：Kinetics and Catalysis, 2013, 54(6): 735-743.

DOI：10.1134/S0023158413060086

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 400A degrees C. A study of the kinetics of oxidation of ethylene glycol showed that it was consecutively converted into glycolaldehyde and glyoxal at 400A degrees C. At 500-550A degrees 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.

• 出版日期2013-11