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Table 5 Comparison of compounds (% area on pyrogram) produced from purified lignin pyrolysis at 650°C

From: Identification and thermochemical analysis of high-lignin feedstocks for biofuel and biochemical production

  Feedstock
Compound Switchgrass Walnut DE Olive DE Coconut DE Peach DE
Benzene 0.51 0 0 0 0.47
Acetic acid 6.32 2.47 4.26 2.97 3.26
Toluene 2.74 0.79 0.79 0.43 1.65
Propanoic acid 0.65 0 0 0 0
Xylene 0.45 0.37 0.34 0.16 0.45
Furfural 2.46 0.97 1.11 1 1.36
Phenol 8.23 3.67 1.06 18.41 2.71
2-methoxyphenol 9.93 11.41 11.03 9.64 11.63
2-methylphenol 2.35 1.89 1.4 2.13 2.02
2,6-dimethylphenol 0.15 0.12 0.17 0.21 0.18
4-methylphenol 11.53 8.25 3.7 4.09 6.46
2-methoxy-4-methylphenol 20.51 21.63 21.02 12.82 26.4
4-ethyl-2-methoxyphenol 0 5.5 5.7 3.86 5.16
2-methoxy-4-vinylphenol 6.28 18.39 12.39 19.22 6.93
2,6-dimethoxyphenol 0 0 0 1.56 0
2-methoxy-4-(1-propenyl)-phenol 0 0 0 2.14 0
2-methoxy-4-(2-propenyl)-phenol 0 10.88 14.45 6.46 13.2
Vanillin 0 0 0 0.17 0
  1. DE = drupe endocarp.