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Table 1 Compositional analysis of the untreated, acid-steam-exploded and integrally treated corn stovers

From: Valorization of lignin and cellulose in acid-steam-exploded corn stover by a moderate alkaline ethanol post-treatment based on an integrated biorefinery concept

Samples Treatment methods Solid yields Cellulose Hemicelluloses Lignin Others
Corn stover Untreated 36.5 (2.1) 22.1 (0.9) 18.8 (1.7) 22.6 (1.3)
1 Acid steam explosion 55.6 (3.5)a 5.7 (0.7) 32.8 (2.6) 5.9 (0.9)
2 Acid steam explosion followed by a 0.05% alcoholic NaOH post-treatment 78.1 71.1 (2.8) 6.4 (0.6) 19.1 (3.4) 3.4 (0.6)
3 Acid steam explosion followed by a 0.5% alcoholic NaOH post-treatment 70.3 78.9 (3.3) 4.2 (0.6) 15.9 (3.2) 1.0 (0.1)
4 Acid steam explosion followed by a 4% alcoholic NaOH post-treatment 65.4 84.0 (4.4) 4.1 (0.7) 10.7 (1.7) 1.2 (0.8)
5 Acid steam explosion followed by a NaClO2 post-treatment 59.6 89.2 (2.5) 7.5 (1.1) 3.0 (0.4) 0.3 (0.1)
  1. aThe value in parenthesis is standard deviation