Sr doping magnetic CaO parcel ferrite improving catalytic activity on the synthesis of biodiesel by transesterification

The CaO@ (Sr2Fe2O5-Fe2O3) magnetic catalyst was carried out by the co-precipitated method. Comparing pure CaO, the modified CaO acted better on the synthesis of biodiesel with soybean oil and methanol as raw material. After further reused for 5 times, the yield of biodiesel could still reach 89.0% at the optimal conditions (12:1 methanol to oil molar ratio, 0.5 wt.% catalyst concentration, 70 °C reaction temperature, 2 h reaction time), which indicated that the CaO@ (Sr2Fe2O5-Fe2O3) catalyst was stable. The preparation of CaO@ (Sr2Fe2O5-Fe2O3) heterogeneous catalyst would provide more choices for industrial application.

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