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Table 2 Recovery of WIS, glucan and xylan as percentage of the theoretical value, and the content of lignin in the WIS

From: Ethanol and biogas production after steam pretreatment of corn stover with or without the addition of sulphuric acid

Catalyst Temp (°C) Time (min) WIS (%) Glucan (%) Xylan (%) Lignin* (%)
WIS Hydrolysate WIS Hydrolysate
None 190 5 79.8 111.0 8.9 84.6 26.8 22.6
  200 5 53.3 76.4 7.9 29.1 40.6 27.5
  210 5 62.9 106.3 7.2 21.4 36.9 28.1
  190 10 66.8 98.8 7.6 50.0 41.6 24.6
  200 10 60.6 96.5 7.6 13.0 40.3 29.2
  210 10 56.4 92.9 5.7 11.2 16.0 36.0
0.2% Sulphuric acid 190 5 70.1 97.2 7.5 32.0 60.6 27.1
  200 5 67.3 101.2 6.8 22.9 65.8 28.9
  210 5 65.9 105.2 6.3 13.8 53.1 33.0
  190 10 58.9 86.5 7.9 21.1 69.9 28.5
  200 10 65.2 104.3 6.7 14.9 42.6 27.6
  210 10 66.9 91.8 4.6 8.9 21.1 29.4
0.5% Sulphuric acid 190 5 59.9 97.6 4.2 8.5 40.2 27.2
  200 5 59.0 97.5 4.6 6.1 35.0 27.0
  210 5 62.8 106.4 4.4 4.4 25.6 28.7
  190 10 59.7 97.3 4.3 7.3 32.8 28.9
  200 10 62.9 105.1 3.9 6.2 24.1 28.1
  210 10 58.5 100.2 3.8 3.2 13.6 30.3
  1. * Acid-soluble lignin included.