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http://dx.doi.org/10.12925/jkocs.2006.23.3.7

Synthesis of Methanol and Formaldehyde by Partial Oxidation of Methane over Mixed Oxide Catalysts  

Hahm, Hyun-Sik (Department of Chemical Engineering, Myongji University)
Shin, Ki-Seok (Department of Chemical Engineering, Myongji University)
Ahn, Sung-Hwan (Department of Chemical Engineering, Myongji University)
Kim, Song-Hyoung (Department of Chemical Engineering, Myongji University)
Hong, Seok-Young (Department of Chemical Engineering, Myongji University)
Park, Hong-Soo (Department of Chemical Engineering, Myongji University)
Publication Information
Journal of the Korean Applied Science and Technology / v.23, no.3, 2006 , pp. 223-229 More about this Journal
Abstract
Methanol and formaldehyde were produced directly by the partial oxidation of methane over mixed oxide catalysts. The catalysts were composed of Mo and Bi with late-transition metals, such as Mn, Fe, and Co. The reaction was carried out at $450^{\circ}C$, 50 bar in a fixed-bed differential reactor. The prepared catalysts were characterized by $O_2-TPD$ and BET apparatus. Among the catalysts used, the catalyst composed of 1:1:2.5 molar ratio of Mo:Bi:Mn showed the best methane conversion and methanol selectivity. The change in ratio of methane to oxygen affected at the conversion and selectivity, and the most proper ratio was 10:1.5. Methane conversion, methanol and formaldehyde selectivities increased with the surface areas of the catalysts. From the $O_2-TPD$ result, it was found that the oxygen species responsible for this reaction might be the lattice oxygen species desorbed at high temperature around $800^{\circ}C$.
Keywords
partial oxidation of methane; lattice oxygen; mixed oxide catalyst; synthesis of methanol and formaldehyde;
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