Efficient pretreatment of lignocellulosic biomass with high recovery of solid lignin and fermentable sugars using Fenton reaction in a mixed solvent

Table 2 Effects of hydrogen peroxide and amount of corncob on the first-round pretreatment

Entry	Metal salt	Corncob (g)	H₂O₂ (mmol)	Xylose yield (%)	Xylose (g/L)	Glucose yield (%)	Glucose (g/L)	Arabinose yield (%)	Total carbohydrate yield (%)
1	FeCl₃	0.2	3.0	92.2 ± 1.8	20.40 ± 0.68	20.1 ± 0.8	6.55 ± 0.07	98.4 ± 1.1	74.4 ± 1.1
2	FeCl₃	0.2	4.5	90.4 ± 1.1	20.05 ± 0.37	22.6 ± 0.4	7.38 ± 0.31	97.3 ± 0.9	76.5 ± 1.3
3	FeCl₃	0.2	9.0	87.3 ± 0.8	19.37 ± 0.47	16.4 ± 0.4	5.36 ± 0.54	90.5 ± 0.7	74.2 ± 0.9
4	FeCl₃	0.4	3.0	80.7 ± 0.7	35.81 ± 0.47	19.1 ± 0.3	12.50 ± 0.42	82.4 ± 0.7	70.1 ± 1.1
5	FeCl₃	0.6	3.0	77. 4 ± 1.1	51.52 ± 0.73	17.5 ± 0.6	17.17 ± 0.43	88.1 ± 0.5	70.8 ± 0.6
6	FeCl₃	0.8	3.0	64.7 ± 1.3	57.43 ± 1.13	18.6 ± 0.4	24.32 ± 0.65	82.7 ± 0.6	61.5 ± 0.9

Reaction conditions: Corncob, FeCl₃ (7.5 × 10⁻³ mmol, 3.3 mmol/L), H₂O₂ (35 wt% in H₂O), solvent: 2 mL (DMSO/water, 1:6), temperature: 130 °C, time: 30 min, in a 40 mL Pyrex tube with a Teflon screw cap

ISSN: 2731-3654