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Table 1 Characteristics of different types of lignocellulosic biomass after high-pressure pretreatment

From: High-pressure microwave-assisted pretreatment of softwood, hardwood and non-wood biomass using different solvents in the production of cellulosic ethanol

Pretreatment conditions

Type of biomass

Type of solvent used for the pretreatment

Biomass extractives

(%)

Lignocellulose composition (% DW)

Biomass crystallinity (%)

Hydrolysis susceptibility of biomass*

[mg/g DW]

Hydrolysis yield*

[%]

Cellulose

Hemicellulose

Lignin

156 PSI,

60 min., 600 W

Pine chips

H2O

28.68 a ± 1.54

57.05 a ± 0.15

4.65 ac ± 1.40

36.00 a ± 0.00

55.93

96.31 a ± 1.25

15.20 a ± 0.20

40% w/v NaCS

46.37 b ± 0.05

72.81 b ± 0.18

2.33 b ± 0.76

22.74 b ± 0.04

66.26

152.47 b ± 0.78

18.85 b ± 0.10

1% w/v NaOH

39.44 c ± 3.42

65.47 c ± 0.03

3.43 bc ± 1.06

28.64 c ± 0.54

69.03

115.38 c ± 2.13

15.86 a ± 0.29

60% v/v EtOH + 1% v/v H2SO4

44.75 bc ± 3.81

72.11 b ± 0.31

2.56 b ± 0.64

21.54 d ± 0.14

66.77

244.69 d ± 3.88

30.54 c ± 0.49

Beech chips

H2O

31.32 a ± 0.01

66.00 c ± 0.90

4.86 ac ± 1.25

16.65 e ± 0.35

65.96

352.07 e ± 0.44

48.01 d ± 0.06

40% w/v NaCS

54.59 d ± 1.04

88.46 d ± 0.36

2.02 b ± 0.80

6.15 f ± 0.35

72.93

533.97 f ± 4.47

54.33 e ± 0.45

1% w/v NaOH

47.34 b ± 2.30

83.00 e ± 0.40

4.47 ac ± 0.35

6.65 f ± 0.35

73.24

573.61 g ± 5.66

62.21 f ± 0.62

60% v/v EtOH + 1% v/v H2SO4

59.51 d ± 2.24

84.02 e ± 0.50

2.43 b ± 0.35

7.09 f ± 0.10

70.64

530.56 f ± 4.69

56.84 g ± 0.50

Wheat straw

H2O

42.47 bc ± 1.25

62.45 f ± 0.35

6.86 d ± 0.55

20.05 g ± 0.05

60.98

455.01 h ± 0.88

65.58 h ± 0.13

40% w/v NaCS

58.14 d ± 1.67

86.40 g ± 0.10

4.30 ac ± 0.66

4.00 h ± 0.10

66.10

682.85 i ± 9.29

71.14 i 0.97

1% w/v NaOH

56.32 d ± 1.18

83.36 e ± 0.54

5.34 d ± 0.64

1.60 i ± 0.10

68.58

1.48 j ± 0.22

0.16 j ± 0.02

60% v/v EtOH + 1% v/v H2SO4

47.93 b ± 1.00

76.65 h ± 0.95

5.56 d ± 0.35

4.40 h ± 0.60

64.24

530.88 f ± 1.13

62.34 f ± 0.13

  1. *after 72 h of hydrolysis under the following conditions: pH 5.5, 16 FPU/g DW, 160 g DW/L. The mean values given in columns within the table with different letter indices are significantly different (α < 0.05). DW dry weight