Skip to main content

Table 2 Chemical composition of untreated and steam exploded lignocellulosic biomasses

From: Understanding the structural and chemical changes of plant biomass following steam explosion pretreatment

Lignocellulosic biomass Pretreatment severity (CSF) Moisture content Glucose Hemicellulosea AILb ASLc Total lignind Ash
Miscanthus × giganteus Untreated 3.3 ± 0.2 45.3 ± 0.8 25.3 ± 0.7 23.8 ± 0.5 1.7 ± 0.1 25.5 ± 0.6 0.5 ± 0.1
2.0 2.8 ± 0.1 65.5 ± 3.4 5.6 ± 0.4 25.7 ± 0.5 1.5 ± 0.2 27.2 ± 0.7 0.5 ± 0.1
2.6 2.5 ± 0.3 66.7 ± 2.7 1.9 ± 0.5 27.3 ± 0.4 1.8 ± 0.1 29.1 ± 0.5 0.7 ± 0.4
2.7 2.8 ± 0.2 65.8 ± 1.9 2.0 ± 0.1 27.8 ± 0.9 1.8 ± 0.1 29.6 ± 1.0 0.8 ± 0.3
2.8 3.3 ± 0.1 64.7 ± 4.1 1.8 ± 0.3 27.7 ± 0.3 2.0 ± 0.1 29.7 ± 0.4 0.9 ± 0.1
Poplar Untreated 3.9 ± 0.3 43.2 ± 2.6 20.2 ± 1.3 27.8 ± 0.2 1.7 ± 0.1 29.5 ± 0.3 0.5 ± 0.2
2.0 3.0 ± 0.1 59.4 ± 3.3 6.4 ± 1.5 28.8 ± 0.1 1.7 ± 0.1 30.5 ± 0.2 0.4 ± 0.1
2.6 3.2 ± 0.1 61.6 ± 3.3 2.0 ± 0.4 31.0 ± 0.5 2.0 ± 0.1 33.0 ± 0.6 0.8 ± 0.1
2.8 3.2 ± 0.1 62.7 ± 1.1 1.6 ± 0.2 31.1 ± 0.6 2.3 ± 0.1 33.4 ± 0.7 0.8 ± 0.1
Wheat straw Untreated 5.2 ± 0.1 39.1 ± 2.2 29.4 ± 1.8 22.6 ± 0.5 2.0 ± 0.1 24.6 ± 0.6 2.0 ± 0.3
2.0 3.6 ± 0.1 59.5 ± 1.6 10.0 ± 0.4 23.0 ± 0.3 1.6 ± 0.1 24.6 ± 0.4 1.3 ± 0.2
2.6 3.4 ± 0.3 63.4 ± 2.0 4.3 ± 0.3 25.4 ± 0.4 1.9 ± 0.1 27.3 ± 0.5 1.5 ± 0.3
2.7 3.1 ± 0.1 63.7 ± 2.3 3.9 ± 0.2 25.2 ± 0.4 2.0 ± 0.1 27.2 ± 0.5 1.7 ± 0.3
2.8 3.3 ± 0.1 63.2 ± 0.7 3.4 ± 0.1 28.0 ± 0.3 2.1 ± 0.1 30.1 ± 0.4 2.0 ± 0.1
  1. Compositions are expressed as percentage (% w/w) of the residues
  2. aHemicellulose (%) = Xyl (%) + Ara (%) + Gal (%) + Rha (%) + Man (%) + galacturonic acid (%) + glucuronic acid (%)
  3. bAcid insoluble Klason lignin
  4. cAcid soluble lignin
  5. dTotal lignin (%) = acid insoluble lignin (%) + acid soluble lignin (%)