**5.2.9 Biodiesel yield**

312 Biodiesel – Feedstocks and Processing Technologies

%Methyl ester at 90oC

%Methyl ester (at 85oC

%Methyl ester at 100oC

0 0 0 0 0 1 25 34 10 33 2 44 55 28 63 3 56 67 49 68 4 62 74 68 70 5 66 78 80 72 6 68 80 87 72 8 68 83 90 74 10 66 86 91 75 12 66 88 93 75 14 67 87 92 73 15 67 87 92 74 Molar ratio of Methanol to Oil = 6:1, Flow rate =6ml/min, Reaction time = 6min., Catalyst (KOH) =1%

Table 19. Effect of reboiler temperature on methyl ester content of the product

Fig. 19. The effect of the reboiler temperature on methyl esters content in product

0 1 2 3 4 5 6 8 10 12 14 15 **Time (hr)**

70 80 90 100 110 120 130 **Temperature (Degree Celsius)**

120 90 100 85

Time (hrs)

by wt. of oil)

**Methylester (%)**

**Methyl ester (%)**

%Methyl ester at 120oC

The biodiesel yield was determined indirectly from the triglyceride as discussed in the materials and methods section. The percentage composition of the triglyceride consumed was assumed to be converted to methyl ester. Therefore, the amount of biodiesel produced was calculated from the difference in composition of triglyceride in the original oil and final biodiesel.
