Comparison of glycerol ketals, glycerol acetates and branched alcohol-derived fatty esters as cold-flow improvers for palm biodiesel

► Best cold-flow improvers were 2-butyl esters of palm oil. ► Pour and cloud points were decreased about 6 °C. ► DSC analyses showed that additives decrease crystallization points of biodiesel. ► Particle size analyses showed that the additives act by decreasing crystal sizes. ► 2-Butyl esters of palm oil did not have detrimental impact on fuel properties.