Optimization of Liquid Fuel Production from Microwave Pyrolysis of Used Tyres

Table 3

ANOVA for response surface quadratic model.

Source	Sum of squares		Mean square	-value	value
Model	639.49	9	71.05	1.03+05	<0.0001	Significant
X1-microwave power	5.74	1	5.74	8292.19	<0.0001
X2-reaction time	232.32	1	232.32	3.36+05	<0.0001
X3-particle size	88.72	1	88.72	1.28+05	<0.0001
X1.X2	4.68	1	4.68	6762.31	<0.0001
X1.X3	0.06	1	0.06	86.67	<0.0001
X2.X3	22.82	1	22.82	32954.52	<0.0001
(X1)^2	121.19	1	121.19	1.75+05	<0.0001
(X2)^2	142.02	1	142.02	2.05+05	<0.0001
(X3)^2	1.48	1	1.48	2133.74	<0.0001
Residual	0.0242	35	0.0007
Lack-of-fit	0.0042	5	0.0008	1.27	0.3028	Not significant
Pure error	0.02	30	0.0007
Cor total	639.52	44