☆ 4.5 Article

Modified iron-molybdate catalysts with various metal oxides by a mechanochemical method: enhanced formaldehyde yield in methanol partial oxidation

FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING (2021)

期刊

FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING

卷 15, 期 5, 页码 1099-1110

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SPRINGER

DOI: 10.1007/s11705-020-2008-8

关键词

iron molybdate catalyst; metal oxides; methanol to formaldehyde; Co/Mo ratio; formaldehyde yield

类别

Engineering, Chemical

资金

Natural Science Foundation Project of Xinjiang Uygur Autonomous [2019D01C084]

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摘要

Mechanochemical preparation of modified iron molybdate catalysts with various metal salts as precursors showed high efficiency in catalyzing methanol to formaldehyde reaction, with HCHO yields reaching 97.37% at optimal Co/Mo molar ratio conditions. The formation of CoO and the decreased MoO3 sublimation rate were crucial factors enhancing HCHO yield in reactions catalyzed by iron molybdate doped with different Co/Mo mole ratios.

A mechanochemical method was employed to prepare modified iron molybdate catalysts with various metal salts as precursors. The physicochemical properties of the iron molybdate catalysts were characterized, and their performances in catalyzing the reaction from methanol to formaldehyde (HCHO) were evaluated. Iron molybdate catalysts doped with Co(NO3)(2) center dot 6H(2)Oand Al(NO3)(3) center dot 9H(2)O resulted in high HCHO yields. Compared with a commercial catalyst, the HCHO yields in the reaction with the modified catalyst at an optimal Co/Mo molar ratio reached 97.37%. According to chemical state analysis, the formation of CoO and the efficient decrease in the MoO3 sublimation rate could be important factors enhancing the HCHO yield in reactions catalyzed with iron molybdate doped with different Co/Mo mole ratios.

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