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Table 2 Pyrolysis product analysis of lignin derived from enzymatic hydrolysis residue at 60 ℃

From: Pyrolysis characteristics and kinetics of lignin derived from enzymatic hydrolysis residue of bamboo pretreated with white-rot fungus

Peak Compound Retention time (min) Peak area (%)
Non-treatment Fungal treatment
1 Acetic acid 2.413 1.75 ± 0.16 2.12 ± 0.49
2H Toluene 4.844 0.02 ± 0.03 0.28 ± 0.14
3 Furfural 6.492 0.15 ± 0.04 0.42 ± 0.08
4H Phenol 11.269 0.98 ± 0.06 1.44 ± 0.17
5H 2-Methylphenol 13.573 0.37 ± 0.03 0.42 ± 0.01
6H 4-Methylphenol 14.228 1.71 ± 0.03 1.45 ± 0.27
7G Guaiacol 14.630 1.48 ± 0.16 1.96 ± 0.47
8H 2,6-Dimethylphenol 15.137 0.13 ± 0.04 0.18 ± 0.06
9H 2,4-Dimethylphenol 16.405 0.53 ± 0.12 0.54 ± 0.14
10H 4-Ethylphenol 16.997 1.82 ± 0.24 1.49 ± 0.22
11G 2-Methoxy-6-methylphenol 17.314 0.46 ± 0.13 0.38 ± 0.01
12G 2-Methoxy-4-methylphenol, 17.758 2.11 ± 0.11 2.05 ± 0.05
13 Catechol 18.054 1.13 ± 0.07 1.49 ± 0.10
14H 2,3-Dihydrobenzofuran 18.561 9.28 ± 0.72 6.23 ± 0.48
15H 1-Ethyl-4-methoxybenzene 19.047 0.46 ± 0.12 0.34 ± 0.17
16H 4-(2-Propenyl)phenol 19.512 0.24 ± 0.11 0.17 ± 0.04
17H 4-Propylphenol 19.618 0.41 ± 0.02 0.21 ± 0.02
18G 3-Methoxy-2-benzenediol 19.745 2.87 ± 0.23 3.86 ± 0.06
19G 4-Ethylguaiacol 20.210 1.23 ± 0.08 1.17 ± 0.16
20H 2-Allylphenol 20.500 0.20 ± 0.07 0.21 ± 0.05
21 4-Methylcatechol 20.590 1.24 ± 0.33 0.93 ± 0.00
22H 4-(2-Propenyl)phenol 21.080 0.49 ± 0.31 0.18 ± 0.03
23G 2-Methoxy-4-vinylphenol 21.182 2.27 ± 0.26 2.3 ± 0.38
24G 3-Methoxy-5-methylphenol 21.372 0.48 ± 0.21 0.57 ± 0.21
25H 4-(2-Propenyl)phenol, 21.922 1.16 ± 0.21 0.79 ± 0.17
26S Syringol 22.239 4.04 ± 0.15 4.48 ± 0.61
27G Eugenol 22.344 0.58 ± 0.01 0.36 ± 0.02
28S 3,4-Dimethoxyphenol 22.450 1.73 ± 0.03 1.11 ± 0.17
29H 4-Hydroxybenzaldehyde 22.767 0.94 ± 0.07 0.36 ± 0.11
30S 2,6-Dimethoxytoluene 22.852 0.52 ± 0.22 ND
31G Vanillin 23.486 1.33 ± 0.15 1.08 ± 0.08
32G (e)-Isoeugenol 23.655 0.73 ± 0.04 0.54 ± 0.05
33G Vanillic acid 24.733 6.60 ± 0.11 5.4 ± 0.41
34G Homovanillyl alcohol 24.965 0.31 ± 0.03 ND
35G 4′-Hydroxy-3′-methoxyacetophenone 25.621 0.90 ± 0.12 1.16 ± 0.06
36G Methyl vanillate 26.276 0.27 ± 0.02 0.43 ± 0.05
37S 1,2,3-Trimethoxy-5-methylbenzene 26.466 1.09 ± 0.05 0.98 ± 0.26
38G (4-Hydroxy-3-methoxyphenyl)acetone 26.551 0.57 ± 0.13 0.54 ± 0.03
39S 3′,5′-Dimethoxyacetophenone 27.206 2.28 ± 0.18 1.96 ± 0.42
40G Isovanillic acid 27.375 0.22 ± 0.04 0.41 ± 0.10
41G 4′-Hydroxy-3′-methoxyacetophenone 27.607 ND 0.44 ± 0.01
42S 4-Hydroxy-3,5-dimethoxyallylbenzene 27.861 1.15 ± 0.02 0.98 ± 0.07
43S 4-Hydroxy-3,5-dimethoxyallylbenzene 28.643 1.45 ± 0.16 1.25 ± 0.23
44S Syringaldehyde 28.812 3.52 ± 0.25 1.91 ± 0.07
45G Coniferyl alcohol 28.939 0.46 ± 0.05 0.33 ± 0.07
46S 4-Hydroxy-3,5-dimethoxyallylbenzene 29.383 3.81 ± 0.30 2.94 ± 0.28
47S Acetosyringone 29.848 3.11 ± 0.68 2.56 ± 0.16
48H 4-Hydroxycinnamic acid methyl ester 29.996 0.74 ± 0.14 0.45 ± 0.29
49S 3,5-Dimethoxy-4-hydroxyphenylacetic acid 30.313 2.05 ± 0.35 1.73 ± 0.09
50S Acetosyringone 30.989 0.92 ± 0.15 1.31 ± 0.01
51S (E)-3,5-Dimethoxy-4-hydroxycinnamaldehyde 32.786 0.78 ± 0.37 ND
  Total peak areas of S   26.44 ± 1.64 21.22 ± 1.74
  Total peak areas of G   22.89 ± 0.33 23.01 ± 1.57
  Total peak areas of H   19.49 ± 0.21 14.71 ± 0.47
  1. S syringyl-type lignin derivatives, G guaiacyl-type lignin derivatives, H p-hydroxy phenylpropane-type lignin derivatives