Preparation and Characterization of Alkaline and Acidic Heterogeneous Carbon-Based Catalysts and Their Application in Vegetable Oil Transesterification to Obtain Biodiesel

Table 3

Results of the kinetic modeling of transesterification of safflower oil with methanol using the best alkaline and acidic heterogeneous catalysts.

Catalysts	Parameters	Pseudo-first order^1			Pseudo-second order^2
		50°C	60°C	80°C	50°C	60°C	80°C
3K	ki	0.002	0.003	0.010	0.0004	0.001	0.007
	R^2	0.979	0.988	0.999	0.978	0.984	0.995
3CA	ki	0.006	0.012	0.014	0.014	0.036	0.038
	R^2	0.993	0.997	0.998	0.989	0.990	0.994
3TA	ki	0.005	0.008	0.014	0.012	0.021	0.035
	R^2	0.998	0.999	0.996	0.999	0.995	0.991
3SA	ki	0.007	0.010	0.015	0.017	0.026	0.036
	R^2	0.999	0.995	0.996	0.992	0.993	0.995

¹k₁: min⁻¹; ²k’₂: L/mol⋅min.