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Table 1 Chemical compositions of untreated and pretreated substrates

From: Comparative study of acid- and alkali-catalyzed 1,4-butanediol pretreatment for co-production of fermentable sugars and value-added lignin compounds

Pretreatment

 

Cellulose (%)

Hemicellulose (%)

Lignin (%)

Raw biomass

46.38

20.50

29.03

HCl-Ethanol

30 mM

58.17

16.73

22.87

HCl-Ethanol

40 mM

67.40

11.60

18.32

HCl-Ethanol

50 mM

72.47

9.63

16.78

BDO

No catalyst

52.21

20.46

25.74

HCl-BDO

10 mM

56.78

20.48

20.75

HCl-BDO

20 mM

66.69

14.97

15.58

HCl-BDO

30 mM

73.06

11.27

13.10

HCl-BDO

40 mM

78.60

11.42

9.57

HCl-BDO

50 mM

88.60

5.00

6.14

NaOH-BDO

250 mM

61.81

16.59

19.94

NaOH-BDO

300 mM

65.07

15.63

17.37

NaOH-BDO

350 mM

67.60

14.58

16.10

NaOH-BDO

400 mM

70.70

13.12

13.97

NaOH-BDO

450 mM

72.84

11.44

13.87