Production and extraction of sugars from switchgrass hydrolyzed in ionic liquids

Table 2 Glucose and xylose yields after acidolysis of biomass in [C ₄ mim]Cl using different pretreatment conditions and water addition methods ^a

Run no.	Pretreatment conditions	H₂O addition method	Solid residue (wt%)	Glucose yield (%)	Xylose yield (%)
1	105°C 6 h	Aliquot	34.9	20.7 ± 0.4	99.8 ± 2.6
2^b	105°C 6 h	Aliquot	34.8	24.2 ± 0.3	98.6 ± 1.8
3^c	105°C 6 h	Aliquot	34.8	27.4 ± 0.7	95.1 ± 2.0
4	160°C 1 h	Aliquot	13.7	37.1 ± 1.2	83.4 ± 3.8
5	160°C 1.5 h	Aliquot	6.7	69.4 ± 2.5	81. 9 ± 2.8
6	160°C 1.5 h	Pumped @ 10 min	13.8	38.6 ± 2.7	92.6 ± 5.5
7	160°C 1.5 h	Pumped @ 15 min	10.2	83.3 ± 1.9	52.1 ± 1.2

^a For all runs, 0.5 g biomass was mixed with 10 g [C₄mim]Cl; ^b 7.5 mL water was added at the end of the acidolysis; ^c 15 mL water was added at the end of the acidolysis.

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