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• W2040807531 abstract "Nanometer magnetic solid base catalysts were prepared by loading CaO on Fe3O4 with Na2CO3 and NaOH as precipitator, respectively. The optimum conditions for preparation of this catalyst were investigated. The influence of the proportion of Ca2+ to Fe3O4 on the catalytic performance has been studied. The catalyst with highest catalytic activity has been obtained when the proportion of Ca2+ to Fe3O4 is 7:1; the catalytic activity of the catalyst calcined from Ca(OH)2 to Fe3O4 is better than that calcined from CaCO3 to Fe3O4; under the conditions of methanol/oil molar ratio of 15:1, catalyst dosage of 2 wt% and temperature of 70 °C, the biodiesel yield reaches to 95% in 80 min, even to 99% finally. The catalytic activity and recovery rate of the nanometer magnetic solid base catalysts are much better than those of CaO. Calcination temperature was determined by differential thermogravimetric analysis. Ca2Fe2O5, a kind of new metal multiple oxide, was found in the catalyst through X-ray diffraction. At the end, these catalysts were characterized by scanning electronic microscope (SEM), transmission electron microscopy (TEM), and vibrating sample magnetometer (VSM)." @default.
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• W2040807531 date "2010-07-01" @default.
• W2040807531 modified "2023-10-16" @default.
• W2040807531 title "The nanometer magnetic solid base catalyst for production of biodiesel" @default.
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• W2040807531 doi "https://doi.org/10.1016/j.renene.2009.10.009" @default.
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