*2.3. Distillation*

The bio-jet fuel fraction of the FAEE was obtained by fractional distillation process, which was carried out as shown in Figure 2. The bio-jet fuel with a lower boiling point (C8-C14 of FAEE) was separated from the FAEE by using a rotary evaporator at 165 ◦C and

25 mbar for 120 min. The bio-jet fuel was collected, and the percentage yield of bio-jet fuel was calculated by using the equation below:

$$\% \text{yield of biojet fuel} = \frac{amount \text{ of biojet fuel obtained (g)}}{amount \text{ of cocount oil feed stock} \text{ (g)}} \times 100\% \tag{5}$$

**Figure 2.** Experimental setup for distillation.
