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3 Polish Journal of Chemical Technology

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Direct conversion of methane to oxygenates over MoO3/SiO2 catalysts with an addition of hydrogen and water vapour to the reaction mixture

Kaleńczuk R.J., Ciarka A.

Polish Journal of Chemical Technology

2005

Vol. 7, nr 4

11-16

The main goal of this study was to investigate the effect of chemical parameters on the reaction of methane oxidation. Partial oxidation of methane on silica suported molybdena catalyst has been studied. The chances of an increase of oxygenates yield in partial oxidation of methane to the economically efficient level were investigated. Two kinds of tests were performed: methane oxidation on MoO3/SiO2 catalyst with an addition of hydrogen and water vapour to the reaction mixture. The most profound promoting effect was exhibited by water vapour addition. The optimum selectivity toward methanol formation was found at the reaction temperature around 575 - 650°C. The physico - chemical properties of the catalyst were determined using different techniques: N2 adsorption, SEM and FT-IR.

The effect of boron and magnesium additives on catalytic perform of Mo-0/Si02 in the partial oxidation of methane

Kałucki K., Michalkiewicz B.

Polish Journal of Chemical Technology

2001

Vol. 3, nr 4

16-19

The effect of boron or magnesium additive to the catalyst containing molybdenum oxide on the methane conversion and the selectivity of methane oxidation to the particular products have been investigated. It has been found that the boron used as an additive, elevated the selectivity of methane oxidation to formaldehyde. The highest methane conversion wasobtainet over the Mo-0/SiO2 catalyst. For the catalysts with additives, the conversion was low. Both boron and magnesium allow the elimination of the oxidation reaction of carbon monoxide to carbon dioxide.

Partial oxidation of methane to formaldehyde over a Mo-0/Si02 catalyst

Kałucki K., Michalkiewicz M.

Polish Journal of Chemical Technology

2000

Vol. 2, nr 2

17-20

Studies on the oxidation of methane by oxygen over a Mo-O/SiO2 catalyst were performed in a vertical tubular reactor. The process was carried out over a range of temperatures from 400 to 600°C at atmospheric pressure. Both the content of oxygen in the reaction mixture and the contact time were varied. The major products of the oxidation of methane over the Mo-O/SiO, catalyst have been formaldehyde, carbon oxides, and water. The effect of temperature, contact time and methane conversion on the selectivity of methane oxidation to the respective products was studied. The mechanism of the reactions proceeding during the oxidation of methane by oxygen over this catalyst has been proposed.