Table 4.

Experimental validation of experimental parameters and its comparative analysis with other reported works.

	Experimental validation of experimental parameters
	Optimum Parameters			Delignification (mg/g)
	NaOH Concentration (%w/v)	Reaction Time (min)	Temperature (°C)
Predicted	7.59	75.11	40	72.4
Replica 1	7.59	75.11	40	70.03
Replica 2	7.59	75.11	40	70.03
Replica 3	7.59	75.11	40	70.03
Comparative analysis of delignification with other reported works
	Parameter selection range
Plant parts	Delignifying agent (%w/v)	Reaction time (h)	Reaction temperature (°C)	Lignin removed	Reference
Pressed palm oil seed	2–6	1–5	30–120	55.29%	[25]
Corn-cobs	76–92	50–70	1.5–7.5	71.16%	[26]
Palm oil trunk	8–20	30–60	50.80	–	[30]
Rice straw	2–5	85–155	61–89	42.98 mg/g	[24]
Rice straw	2–10	60–120	40–110	70.03 mg/g	[Present study]