Table 5.
Physical property, composition, yield, and residual methanol of MCPO and esterified oil.
| Compositiona, yieldb, and residual methanol | MCPO | Esterified oila |
|---|---|---|
| Free fatty acid (wt%) | 11.46 | 1.028 |
| Methyl ester (wt%) | 5.138 | |
| Triglyceride (wt%) | 77.88 | 89.67 |
| Diglyceride (wt%) | 10.35 | 4.061 |
| Monoglyceride (wt%) | 0.309 | 0.102 |
| Density | ||
| at 60 °C (kg/L) | 0.883 | 0.889 |
| at 32 °C, room temperature (kg/L) | 0.91 | 0.894 |
| Yieldb | ||
| Eterified oil (vol%) | 96.07 | |
| Generated wastewater (vol%) | 24.53 | |
| Purified esterified oil (vol%) | 91.27 | |
| Residual methanol | ||
| Residual methanol in esterified oil (vol%) | 1.383 | |
| Residual methanol in generated wastewater (vol%) | 8.305 | |
a
Result of actual experiment
b
Yield of esterification process (vol%) = the volume of product (mL)/the volume of initial MCPO (mL). The yields are relative to 100 vol% of initial MCPO.