State of Art of Alkaline Earth Metal Oxides Catalysts Used in the Transesterification of Oils for Biodiesel Production

Biodiesel produced through catalytic transesterification of triglycerides from edible and non-edible oils alcohol is considered an alternative to traditional petro-diesel. The interest in the use alkaline earth metal oxides as heterogeneous basic catalysts has increased due their availability, non-toxicity, capacity be reused, low cost, high concentration surface sites that provide activity. This work a compilation strategies understand effect source, synthesis, thermal treatment MgO, CaO, SrO, BaO on improvement density strength, morphology solid structure, stability during reaction reusability. These parameters are commonly modified or enhanced by mixing these with metals. Also, acid-base properties avoid lixiviation can achieved supporting another oxide. Additionally, most relevant operation conditions oil reactions such methanol ratio, temperature, agitation method, pressure, reviewed. review attempts elucidate optimum application different oils.