Surface complexes of propylene and their role in catalytic oxidation

摘要: Infrared (ir) spectroscopy and thermodesorption studies of propylene adsorption on CuO, Cu2O, Cr2O3, CuOMgO, gallium molybdate, MoO3SiO2, MoO3Al2O3 have shown that is adsorbed in reversible (π-allyl σ-allyl) irreversible (π-complexes, carboxylate, carbonate, formate) forms. It emerges both symmetric asymmetric allyl complexes may participate acrolein formation. The conversion the surface π-allyl into MeOCH2CHCH2 type compound takes place a molybdate catalyst. π-Complexes, carboxylates, carbonates, formates yield products complete oxidation, CO2 H2O. This occur with carboxylate-formate either by stepwise mechanism involving catalyst oxygen or concerted participation molecular oxygen.