Response Surface Methodology Process Optimization of Biodiesel Production from Castor Seed Oil

Table 4

Physiochemical properties of biodiesel (CME).

Parameter	Unit	CME	ASTM standard
Density at 15°C	g/ml	0.89	0.86–0.9
Kinematic viscosity at 40°C	cSt	5.22	1.9–6
Acid value	mg·KOH/g oil	4.3	4.3
FFA	%	2.15	2.15
Saponification value	mg·KOH/g oil	179	179
Iodine value	mgI2/100 oil	97.4	80.12–82.88
Heating value	MJ/kg	40.6	37.5–42.8
Cetane number	min	54.8	47 min