Abstract

DEL RIO, José Daniel et al. Partial oxidation of methane to formaldehyde on MoO₃, Fe₂O₃ and ferromolybdenum catalysts. Ing. Investig. [online]. 2007, vol.27, n.1, pp.19-24. ISSN 0120-5609.

One of the main challenges for catalysis has been direct methane conversion to useful products such as methanol and formaldehyde. Formaldehyde is currently produced by a three-step industrial process with syngas and methanol as intermediate products. MoO₃, Fe₂O₃ and Fe₂(MoO₄)₃ catalysts were used with four different Mo/Fe molar ratios (0.5, 1, 1.5, 2) in this work. The ferromolybdenum catalyst was prepared by coprecipitation. Pure oxides are more active; however they are not formaldehyde selective, but carbon oxide (CO, CO₂) selective. The ferromolybdenum catalysts showed better HCHO selectivity at low conversions; the molybdenum oxide content did not show increased in catalytic activity. Increased reaction temperature did not increase formaldehyde selectivity.

Keywords : formaldehyde; methane; ferromolybdenum; ferric oxide; molybdenum oxide; partial oxidation.

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