Heat capacity measurements of pure fatty acid methyl esters and biodiesels from 250 to 390 K

• Heat capacities of FAME acid methyl esters were measured in both solid and liquid phases.
• Heat capacities of biodiesels were calculated through an ideal mixing rule.
• Experimental heat capacity of four biodiesels were then determined and compared.

The heat capacities at constant pressure of FAMEs were measured within the temperature range of 250–390 K. The measurements were performed on 7 pure saturated fatty acid methyl esters and 5 unsaturated fatty acid methyl esters. These data were then employed to calculate heat capacities of four different biodiesels (rapeseed and soybean origins) through an ideal mixing rule. The calculated and the experimental heat capacity of these biodiesels were then compared and an absolute average deviation of 0.9% was observed.