Synthesis of 2-Methylpyrazine Over Highly Dispersed Copper Catalysts |
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Authors: | Wen Luo Fang-Li Jing Xiao-Peng Yu Si Sun Shi-Zhong Luo Wei Chu |
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Affiliation: | (1) Department of Chemical Engineering, Sichuan University, Chengdu, 610065, China; |
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Abstract: | Abstract A series of CuCoAl catalysts were synthesized by co-precipitation and impregnation methods, tested in synthesis of 2-methylpyrazine
(2-MP) and characterized by X-ray diffraction, N2 adsorption, thermo-gravimetry analysis, H2-temperature-programmed reduction, dissociative N2O adsorption and temperature-programmed oxidation. The precursors prepared by co-precipitation method shows a well-crystallized
hydrotalcite. The study proves that the calcination temperature of hydrotalcite has a significant effect on the catalyst surface
area, crystallite size and copper dispersion. In comparison with catalyst prepared by impregnation, the catalyst prepared
by co-precipitation method calcined at 500 °C exhibits higher specific surface area, higher copper dispersion and the better
reducibility. Consequently, CuCoAl catalyst derived from hydrotalcite is more active and selective for synthesis of 2-MP.
Moreover, it shows the better stability due to the good resistance to coke formation. |
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