Composition of Algal Oil and Its Potential as Biofuel

Table 4

Fatty acid profiles of biodiesel feedstock (wt.%) resulting from gas chromatographic analysis.

Fatty acid	Double bound position^2	Rapeseed [15]	Sunflower [15]	Nannochloropsis salina [16]	Phaeodactylum tricornutum [17]	Botryococcus braunii [18]
C12:0^1	—	—	—	5.0	—	0.7
C14:0	—	—	—	—	4.5	0.8
C15:0	—	—	—	0.5	—	0.5
C16:0	—	4.9	6.2	37.5	25.8	21.0
C16:1	9	—	0.1	23.3	37.5	2.0
C16:2	7, 10	—	—	—	—	6.5
C16:3	7, 10, 13	—	—	—	—	15.2
C17:0	—	—	—	0.4	—	0.1
C18:0	—	1.6	3.7	0.9	1.3	2.9
C18:1	9	33.0	25.2	11.9	—	3.2
C18:2	9, 12	20.4	63.1	1.5	5.1	13.6
C18:3	9, 12, 15	7.9	0.2	—	2.0	33.0
C20:0	—	—	0.3	0.1	—	0.2
C20:1	11	9.3	0.2	—	—	—
C22:0	—	—	0.7	—	—	0.1
C20:4	5, 8, 11, 14	—	—	3.3	1.6	—
C20:5	5, 8, 11, 14, 17	—	—	15.3	13.1	—
C22:0	—	—	—	0.4	—	—
C22:1	13	23.0	0.1	—	—	—
C24:0	—	—	0.2	—	—	0.2
C24:1	15	—	—	—	—	—

¹Fatty acid with chain length of 12 carbon atoms and 0 double bonds. The same nomenclature applies for all other fatty acids.
²Double bound position beginning from the carboxyl group.