Heterogeneous solid base nanocatalyst: Preparation, characterization and application in biodiesel production

► Screenings of load and support. ► Screenings of loading amount and calcination temperature. ► Characterizations (XRD, FTIR, TEM, TGA, N2 adsorption-desorption and the Hammett indicator). ► Nanocatalyst was used to convert soybean oil to biodiesel. ► Determinations of the properties of biodiesel (density, cetane number, flash point, cold filter plugging point, acid number, water content, ash content and total glycerol content).