Catalytic oxidation of methane to methanol with H{sub 2}-O{sub 2} gas mixture at atmospheric pressure
- Tokyo Inst. of Technology, Ookayama, Meguro-ku (Japan)
Oxidation of methane with oxygen in the presence of hydrogen has been performed at atmospheric pressure over a large variety of catalysts. Among the catalysts tested, iron phosphate showed a very unique catalytic property. The presence of hydrogen initiates the selective oxidation of methane to methanol at {ge}623 K over FePO{sub 4} catalyst. Formaldehyde as a secondary product is produced through methanol at higher reaction temperatures, while, in the absence of hydrogen, no reaction occurs at {le}673 K on the same FePO{sub 4} catalyst. The conversion of methane is notably low at >673 K in the absence of hydrogen and only formaldehyde and carbon oxides are formed. The comparison of the kinetic results in the presence and absence of hydrogen has suggested the generation of an active oxygen species on the catalyst surface in the presence of hydrogen. The pulse reaction studies show that methanol is formed only when methane, hydrogen, and oxygen are cofed. The formation of methanol is enhanced by pretreatment of the catalyst surface with hydrogen. 22 refs., 11 figs., 5 tabs.
- OSTI ID:
- 486292
- Journal Information:
- Journal of Catalysis, Journal Name: Journal of Catalysis Journal Issue: 2 Vol. 155; ISSN 0021-9517; ISSN JCTLA5
- Country of Publication:
- United States
- Language:
- English
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