Decarboxylative co-dimerization process and synthetic fuels produced therefrom

A method for producing renewable hydrocarbon fuels, the method comprising

• electrolysis of a mixture in an electrolysis cell, the electrolysis cell comprising an anode and a cathode, and the mixture comprising
• (i) free fatty acids distilled from fats, oils, and/or greases, and
• (ii) terminal monomethyl-branched carboxylic acids in at least a 100% molar excess relative to the free fatty acids, to produce an electrolysis product comprising a renewable diesel and optionally a renewable gasoline, wherein the electrolysis comprises an electrode current density of about 0.05 A/cm2 to about 1.0 A/cm2, and a cell voltage of about 8 Volts to about 35 Volts;
• wherein the renewable diesel comprises terminal monomethyl-branched paraffins and terminal monomethyl-branched cis alkenes;
• and
• wherein the renewable diesel has cloud point less than −10° C. and the cetane number greater than 60.