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  • Title: The activity and stability of CeO2@CaO catalysts for the production of biodiesel.
    Author: Zhang N, Xue H, Hu R.
    Journal: RSC Adv; 2018 Sep 18; 8(57):32922-32929. PubMed ID: 35547696.
    Abstract:
    A novel CeO2@CaO catalyst was prepared via a hydrothermal method. The physicochemical properties and morphologies of the prepared CeO2@CaO catalysts were characterized by X-ray diffraction, N2 physisorption, CO2 temperature-programmed desorption, X-ray photoelectron spectroscopy, transmission electron microscopy and energy dispersive X-ray analysis. It was found that the prepared CeO2@CaO catalyst had a distinct core-shell structure. The catalytic activity of the CeO2@CaO sample as a heterogeneous catalyst for the transesterification of soybean oil to produce biodiesel has been studied. The results showed that the optimum yield of biodiesel can reach 98% over the CeO2@CaO-60 catalyst under the reaction conditions of 3 wt% catalyst, methanol to oil molar ratio of 6 : 1, reaction temperature of 70 °C and reaction time of 6 h. Stability tests indicated that the biodiesel yield can reach more than 80% even after 9 reaction cycles due to the strong synergic interaction between CaO and CeO2.
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