Response Surface Methodology Process Optimization of Biodiesel Production from Castor Seed Oil

Table 5

The composition of free fatty acids (FFAs) castor biodiesel.

Name	Formula	%
Hexadecanoic acid, methyl ester	C17H34O2	1.36
Hexadecanoic acid, ethyl ester	C18H36O2	0.03
Heptadecanoic acid, methyl ester	C18H36O2	0.032
13-Hexyloxacyclotridec-10-en-2-one	C18H32O2	0.21
9,12-Octadecadienoic acid (Z, Z)-, methyl ester	C19H34O2	4.91
9-Octadecenoic acid (Z)-, methyl ester	C19H36O2	3.73
13-Octadecenoic acid, methyl ester	C19H36O2	0.50
Methyl stearate	C19H38O2	1.50
Linoleic acid ethyl ester	C20H36O2	0.13
Ethyl oleate	C20H38O2	0.07
Methyl ricinoleate	C19H36O3	84.10
Ricinoleic acid	C18H34O3	0.37
9-Octadecenoic acid, 12-hydroxy-, ethyl ester, [R-(Z)]-	C20H38O3	2.59
Octadecanoic acid, 9,10-dihydroxy-, methyl ester	C19H38O4	0.47