Response Surface Methodology for Biodiesel Production Using Calcium Methoxide Catalyst Assisted with Tetrahydrofuran as Cosolvent

Table 6

Optimum conditions using Ca(OCH₃)₂ with and without THF as cosolvent for WCO biodiesel production.

Method	Temperature (°C)	Methanol-to-oil molar ratio	Ca(OCH3)2 Catalyst (wt%)	Time (min)	FAME
					Conversion	Purity (%)
Without THF	65°C	12 : 1	3	180	99.06	97.00
With THF	65°C	11.60 : 1	2.83	100.14	99.43	97.13