The side degradation reactions and

The side degradation reactions and losses of unsaturated FAMEs appear in a higher level of reaction time that can reduce the biodiesel yield [28,29].
Fig. 6 shows the effect of temperature and CO2 pressure on the yield of the biodiesel.
It was reported that for the system pressures lower than 20 MPa, FAMEs content is affected significantly by pressure, but for higher pressures yield variation is negligible [28–30].