Biofuel derived from glycerol esters and method for obtaining same

Method for preparing an iron nanoparticle combustion additive and a fuel from fats, oils or a mixture of both, comprising the steps of:

• a. purifying crude fats and/or oils to remove rubber, phospholipids, lipids, and particles;
• b. reacting with free fatty acids or activated fatty acids, in excess, by interesterification, transesterification or acidolysis, in the presence of a suitable catalyst, of the fats and/or oils purified from the previous stage to obtain triacylglycerol with suitable viscosity, free fatty acids of different chain sizes, acylglycerols and others;
• c. fractioning the mixture obtained from stage b to obtain a rich in free or activated medium or long chain fatty acids fraction, from 6 to 20 carbon atoms, a rich in free or activated short chain fatty acids fraction (2 to 6 carbon atoms), and a rich in triacylglycerols and acylglycerols fraction;
• d. reacting the rich in medium or long chain fatty acids fraction, in an oxygen-free alkaline environment, with iron salts in the presence of an oxidizing agent;
• e. filtering or settling the precipitate obtained from stage d, to obtain a partially moist solid;
• f. drying the partially moist solid obtained from step e, to obtain an agglomerated powder of iron hydroxides;
• g. calcining the agglomerated powder of iron hydroxides obtained from step £ to obtain an iron nanoparticles additive;
• h. emulsifying the rich in triacylglycerols and acylglycerols fraction with hydrogen peroxide or the iron nanoparticles additive obtained from step g. or a mixture of both, in the presence of a surfactant, to obtain a fuel.