Active Razor Shell CaO Catalyst Synthesis for Jatropha Methyl Ester Production via Optimized Two-Step Transesterification

Table 2

The CCD design matrix for JME yield prediction (randomized).

Type of points and runs	Run	Block	Coded parameters					JME yield
								Predict.	Exp.
Cubic points; (16 runs)	1	1	1	−1	−1	−1	−1	74.81	74.40
	2	1	1	1	1	1	1	73.52	72.40
	3	1	1	−1	1	−1	1	82.58	83.40
	4	1	1	−1	−1	1	1	85.47	85.60
	5	1	1	−1	1	1	−1	78.76	77.80
	6	1	1	1	1	−1	−1	80.80	79.60
	7	1	1	1	−1	1	−1	88.26	89.00
	8	1	−1	1	1	1	−1	87.36	86.40
	9	1	1	1	−1	−1	1	83.90	83.20
	10	1	−1	-1	−1	1	−1	79.14	78.20
	11	1	−1	1	−1	1	1	87.21	89.20
	12	1	−1	−1	−1	−1	1	88.71	89.00
	13	1	−1	1	−1	−1	−1	87.78	87.00
	14	1	−1	−1	1	−1	−1	84.08	82.60
	15	1	−1	−1	1	1	1	90.09	91.00
	16	1	−1	1	1	−1	1	91.59	91.80
Axial points α = ±2 (10 runs)	17	2	−2	0	0	0	0	90.19	87.20
	18	2	2	0	0	0	0	90.71	93.40
	19	2	0	0	0	−2	0	81.00	84.00
	20	2	0	0	−2	0	0	94.41	93.00
	21	2	0	−2	0	0	0	83.66	83.20
	22	2	0	0	0	0	2	91.67	93.00
	23	2	0	2	0	0	0	85.55	86.60
	24	2	0	0	0	0	−2	94.58	94.40
	25	2	0	0	2	0	0	94.44	95.60
	26	2	0	0	0	2	0	96.30	96.00
Center points in cube α = 0 (6 runs)	27	1	0	0	0	0	0	98.25	98.00
	28	1	0	0	0	0	0	98.25	98.00
	29	1	0	0	0	0	0	95.26	97.60
	30	1	0	0	0	0	0	95.26	97.60
	31	1	0	0	0	0	0	98.25	98.00
	32	1	0	0	0	0	0	98.25	97.80
Center points in axial (1 run)	33	2	0	0	0	0	0	99.89	98.00