Interaction of oxygen and ethylene glycol with the surface of silver catalysts

The interaction of oxygen and ethylene glycol with the surface of several c arriers and deposited silver catalysts was studied by programmed-temperatur e desorption and programmed-temperature reaction methods. Silver was shown to be present in a high-dispersity state on the surface of aluminosilicate carriers. A decrease in the selectivity of catalysts during glyoxal synthes is occurred because of an increase in the fraction of dissociatively adsorb ed ethylene glycol responsible for the formation of formaldehyde and CO2. A decrease in the amount of oxygen adsorbed in the atomic form caused a decr ease in the concentration of active centers capable of transforming ethylen e glycol to glyoxal.