High-Yield Alpha-Cellulose from Oil Palm Empty Fruit Bunches by Optimizing Thermochemical Delignification Processes for Use as Microcrystalline Cellulose

Table 4

Fit summary.

Source	Sequential value	Lack of fit value	Adjusted R^2	Predicted R^2
Water extractive material
Linear	0.2921	0.9948	0.0618	−0.0051	Suggested
2FI	0.8887	0.9869	−0.0401	−0.1636
Quadratic	0.9552	0.9269	−0.3198	−0.6253
Cubic	0.8789	0.6666	−0.7548	−2.4760	Aliased
Hemicellulose
Linear	0.2309	0.0902	0.1049	−0.5146
2FI	0.1895	0.0998	0.1874	−0.6467	Suggested
Quadratic	0.3502	0.0855	0.2258	−1.6543
Cubic	0.3142	0.0537	0.3179	−10.9214	Aliased
Cellulose
Linear	0.0480	0.1523	0.3462	−0.0484
2FI	0.3343	0.1437	0.3488	−0.0409
Quadratic	0.0439	0.3721	0.6572	0.1251	Suggested
Cubic	0.3449	0.3180	0.6865	−1.2036	Aliased
Lignin
Linear	0.0024	0.0100	0.6418	0.3982
2FI	0.7516	0.0075	0.6067	0.2999
Quadratic	0.0006	0.2024	0.9390	0.8163	Suggested
Cubic	0.0987	0.5159	0.9662	0.8790	Aliased

Bold type indicates the suggested model for response.