Synthesis of dimethyl carbonate over starch-based carbon-supported Cu nanoparticles catalysts

doi:10.1016/S1872-2067(12)60640-8

Abstract

Abstract:

Carbon-supported Cu (Cu/C) catalyst was prepared from Cu(NO₃)₂ and starch, by the sol-gel method, subsequent high temperature carbonization and KOH activation. Catalyst samples were characterized by scanning and transmission electron microscopies, X-ray diffraction, thermogravimetric analysis, N₂ adsorption-desorption and CO temperature-programmed desorption. Their catalytic performance in the oxidative carbonylation of methanol to dimethyl carbonate (DMC) in a fixed-bed reactor was investigated. The activation temperature and KOH content greatly influenced the catalyst microstructure and catalytic performance. The Cu/C catalyst prepared at activation temperature of 850℃ and KOH/C mass ratio of 1 exhibited the best catalytic activity. Its specific surface area and mean Cu particle size were 1690 m²/g and 30.4 nm, respectively. The space time yield was 235.7 mg·g^-1·h^-1, and the methanol conversion and selectivity for DMC were 1.6% and 76.5%, respectively.

Key words: Starch, Sol-gel method, Carbon support, Potassium hydroxide activation, Dimethyl carbonate

Jun Ren, Changjiang Guo, Leilei Yang, Zhong Li. Synthesis of dimethyl carbonate over starch-based carbon-supported Cu nanoparticles catalysts[J]. Chinese Journal of Catalysis, 2013, 34(9): 1734-1744.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(12)60640-8

https://www.cjcatal.com/EN/Y2013/V34/I9/1734

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