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Table 3 Solid yield, delignification and chemical composition of the four cellulose-rich fractions resulting from various two-stage pretreatments

From: A comparison of various lignin-extraction methods to enhance the accessibility and ease of enzymatic hydrolysis of the cellulosic component of steam-pretreated poplar

Sample Solid yield (%)a Delignification Chemical composition (%)
Extent (%)b Selectivity Glu Xyl Ara Gal Man Lignin
Raw poplar 48.9 14.6 0.4 0.6 2.9 27.5
SP2 63.6 4.9 0.0 0.1 1.2 27.4
DES-SP2 82.6 52.4 5.2 72.9 4.3 0.0 0.0 0.0 15.8
Organosolv-SP2 66.3 63.2 4.4 75.1 2.2 0.0 0.0 2.4 15.2
Soda/AQ-SP2 72.5 54.5 4.2 70.5 2.3 0.0 0.0 2.4 17.2
Hydrotrope-SP2 84.5 40.5 4.4 69.5 3.3 0.0 0.0 2.3 19.3
  1. –, cannot be determined
  2. a Based on the dry weight of the substrate resulted from steam pretreatment at 190 °C for 9.9 min (SP2)
  3. b Based on the lignin content in SP2 substrate