Catalytic activity of caO, ZnO, CaTiO3 and SrTiO3 in biodiesel production
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Transesterification of vegetable oils is the best way to obtain the so called biodiesel. A known problem of biodiesel production is the soap formation when sodium hydroxides are used as catalyst. In this work, we present a series of catalytic tests realized in order to substitute the hydroxide for a solid metallic oxide catalyst. It was observed that calcium oxide nanoparticles had satisfactory catalytic activity when submitted to the same conditions of NaOH homogeneous catalyst. The idea of using vegetable oils as fuel comes from the end of nineteenth century, with Rudolph Diesel. Fuels of vegetable origin have some advantages in comparison with petroleum based fuels, as to be renewable, less toxic, biodegradable, and have lower sulfur contend. In Brazil, ethanol appears as a great substitute for gasoline in combustion based engines. However, for compression based engines, there is not yet a substitute for diesel oil made from vegetable resources produced in the same scale of ethanol. Currently, much research is achieved in order to turn possible the production of biodiesel in commercial scales
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