IRON-CHROMIUM-MOLYBDENUM OXIDE CATALYSTS FOR METHANOL OXIDATION

The activity and selectivity of a precipitated iron-chromium-molybdenu m oxide catalyst (Mo/(Fe + Cr) = 2.5/(0.5 + 0.5)) towards methanol mil d oxidation have been studied by a flow-circulation method. Commensura ble activity and selectivity with those of the industrial Fe2 (MoO4)3- MoO3 catalysts as well as an enhanced stability have been found. The M ossbauer spectra of fresh and tested catalysts show that during the ca talytic reaction a partial reduction occurs and a steady state composi tion differing from the initial one is formed.