Organosolv pretreatment assisted by carbocation scavenger to mitigate surface barrier effect of lignin for improving biomass saccharification and utilization

Table 1 Effect of acid addition in ethanol organosolv pretreatment (EOS) on carbohydrate recovery of the pretreated solid, lignin removal and biomass saccharification (data present in average ± stand deviation)

	Cellulose recovery (%)^a	Hemicellulose recovery (%)^a	Hemicellulose solubilization (%)	Lignin removal (%)	Delignification selectivity^b	Cellulose accessibility (mg g⁻¹)
Raw biomass	-	-	-	-	-	84.83 ± 4.12
EOS-10 mM	99.33 ± 0.05	68.68 ± 0.25	31.32 ± 0.25	22.23 ± 1.05	0.85 ± 0.04	101.11 ± 3.33
EOS-15 mM	98.83 ± 2.83	59.63 ± 1.03	40.37 ± 1.03	33.07 ± 1.09	0.97 ± 0.07	130.87 ± 3.33
EOS-20 mM	93.57 ± 0.80	38.40 ± 0.59	61.60 ± 0.59	59.87 ± 0.01	1.02 ± 0.03	175.19 ± 2.32
EOS-25 mM	89.40 ± 2.01	34.25 ± 0.75	65.75 ± 0.75	63.77 ± 0.44	0.92 ± 0.04	187.45 ± 5.22

-: not applicable
^aRecovery was the percentage of original cellulose retained in the pretreated solid
^bDelignification selectivity was defined as gram lignin removed per gram carbohydrate (cellulose and hemicellulose) solubilized during pretreatment

ISSN: 2731-3654