Skip to main content

Table 2 Mass balance of pretreatment of non-torrefied and torrefied wood of aspen and spruce

From: Comparison of [HSO4], [Cl] and [MeCO2] as anions in pretreatment of aspen and spruce with imidazolium-based ionic liquids

Sample

Dry mass (mg)

RSMa

Arabinan

Galactan

Glucan

Xylan

Mannan

Ligninb

Aspen (control)

50.0 ± 0.1

0.16 ± 0.00

0.70 ± 0.01

22.63 ± 0.08

7.96 ± 0.03

1.32 ± 0.01

9.79 ± 0.03

[HSO4] Aspen

solid

32.6 ± 0.4

NDc

ND

20.44 ± 0.22

3.00 ± 0.04

1.11 ± 0.01

5.36 ± 0.23

liquid

 

0.07 ± 0.01

0.37 ± 0.01

0.34 ± 0.01

3.09 ± 0.06

0.15 ± 0.01

 

[Cl] Aspen

solid

43.6 ± 0.1

ND

0.50 ± 0.01

20.67 ± 0.09

7.22 ± 0.05

0.98 ± 0.01

9.34 ± 0.12

liquid

 

0.04 ± 0.01

0.17 ± 0.02

0.59 ± 0.02

0.04 ± 0.01

0.31 ± 0.02

 

[MeCO2] Aspen

solid

38.3 ± 0.1

ND

0.34 ± 0.01

20.40 ± 0.30

5.36 ± 0.07

0.88 ± 0.01

9.05 ± 0.24

liquid

 

0.06 ± 0.01

0.27 ± 0.02

0.22 ± 0.00

1.58 ± 0.38

0.14 ± 0.02

 

T-aspen (control)

50.0 ± 0.1

ND

ND

15.97 ± 0.03

1.32 ± 0.01

0.69 ± 0.01

27.32 ± 0.05

[HSO4] T-aspen

solid

44.4 ± 0.6

ND

ND

14.02 ± 0.33

0.63 ± 0.02

ND

26.27 ± 0.35

liquid

 

ND

ND

1.12 ± 0.04

0.45 ± 0.02

0.09 ± 0.01

 

[Cl] T-aspen

solid

49.3 ± 0.1

ND

ND

14.30 ± 0.11

1.11 ± 0.01

ND

27.34 ± 0.28

liquid

 

ND

ND

0.32 ± 0.02

0.09 ± 0.01

0.03 ± 0.01

 

[MeCO2] T-aspen

solid

47.4 ± 0.6

ND

ND

14.47 ± 0.39

0.99 ± 0.02

ND

26.93 ± 0.49

liquid

 

ND

ND

0.61 ± 0.04

0.22 ± 0.02

0.05 ± 0.01

 

Spruce (control)

50.0 ± 0.1

0.52 ± 0.01

0.98 ± 0.01

21.85 ± 0.06

3.02 ± 0.01

5.71 ± 0.02

16.27 ± 0.05

[HSO4] Spruce

solid

38.7 ± 0.4

ND

0.28 ± 0.01

20.34 ± 0.18

1.45 ± 0.01

3.27 ± 0.03

12.73 ± 0.24

liquid

 

0.36 ± 0.05

0.51 ± 0.05

0.41 ± 0.04

0.95 ± 0.09

1.51 ± 0.15

 

[Cl] Spruce

solid

45.6 ± 1.1

0.47 ± 0.02

0.92 ± 0.03

19.93 ± 0.41

2.89 ± 0.07

5.07 ± 0.13

15.21 ± 0.36

liquid

 

0.03 ± 0.01

0.05 ± 0.01

0.08 ± 0.01

0.01 ± 0.01

0.29 ± 0.03

 

[MeCO2] Spruce

solid

42.6 ± 0.4

0.37 ± 0.02

0.76 ± 0.01

20.57 ± 0.21

2.09 ± 0.03

4.88 ± 0.04

13.21 ± 0.33

liquid

 

0.11 ± 0.01

0.10 ± 0.01

0.06 ± 0.00

0.70 ± 0.11

0.11 ± 0.01

 

T-spruce (control)

50.0 ± 0.1

ND

0.29 ± 0.01

19.95 ± 0.09

0.79 ± 0.01

1.90 ± 0.01

26.81 ± 0.12

[HSO4] T-spruce

solid

43.9 ± 0.1

ND

ND

18.96 ± 0.04

0.40 ± 0.01

0.89 ± 0.01

23.27 ± 0.67

liquid

 

ND

0.15 ± 0.01

0.90 ± 0.06

0.30 ± 0.01

0.86 ± 0.06

 

[Cl] T-spruce

solid

48.8 ± 0.8

ND

0.27 ± 0.01

19.45 ± 0.46

0.74 ± 0.02

1.55 ± 0.05

24.11 ± 1.04

liquid

 

ND

0.02 ± 0.01

0.47 ± 0.03

0.04 ± 0.01

0.31 ± 0.01

 

[MeCO2] T-spruce

solid

47.5 ± 0.2

ND

0.22 ± 0.01

18.47 ± 0.11

0.58 ± 0.01

1.28 ± 0.03

22.52 ± 0.28

liquid

 

ND

0.03 ± 0.01

0.36 ± 0.02

0.07 ± 0.01

0.21 ± 0.01

 
  1. a RSM recovered solid mass
  2. b Lignin sum of ASL and Klason lignin
  3. c ND not detectable
  4. Data based on quadruplicate measurements