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Table 2 Glucan and xylan recovery of the dry pretreatment in the helically agitated reactor

From: Helically agitated mixing in dry dilute acid pretreatment enhances the bioconversion of corn stover into ethanol

Pretreatment conditions Cellulose content before pretreatment (%) Xylan content before pretreatment (%) Glucan recovery (%) Xylan recovery (%)
Raw corn stover 37.15 ± 0.22 19.86 ± 0.56 - -
Changing temperature     
165°C , 2.5%, 3 minutes 38.04 ± 2.04 8.57 ± 2.26 100.09 94.24
175°C , 2.5%, 3 minutes 37.23 ± 0.75 5.28 ± 0.02 96.69 79.32
185°C , 2.5%, 3 minutes 40.93 ± 0.06 2.93 ± 0.16 96.50 62.00
Changing acid usage     
185°C, 1.5%, 3 minutes 37.71 ± 1.07 6.48 ± 0.18 92.05 78.89
185°C, 2.0%, 3 minutes 37.41 ± 0.06 4.16 ± 0.08 96.63 74.91
185°C, 2.5%, 3 minutes 40.93 ± 0.06 2.93 ± 0.16 96.50 62.00
185°C, 3.0%, 3 minutes 38.48 ± 0.40 2.52 ± 0.17 73.97 43.18
185°C, 3.5%, 3 minutes 36.85 ± 1.25 1.79 ± 0.21 75.12 36.37
185°C, 4.0%, 3 minutes 35.98 ± 1.10 1.05 ± 0.10 65.53 29.75
Changing residue time     
185°C, 2.5%, 1 minute 41.52 ± 5.88 4.06 ± 0.41 92.71 64.08
185°C, 2.5%, 3 minutes 40.93 ± 0.06 2.93 ± 0.16 96.50 62.00
185°C, 2.5%, 5 minutes 38.54 ± 1.88 2.93 ± 0.08 82.78 57.29
185°C, 2.5%, 10 minutes 39.29 ± 0.75 2.21 ± 0.22 76.44 42.96
Changing agitation rate     
185°C, 2.5%, 3 minutes, 10 rpm 40.23 ± 2.59 3.00 ± 0.19 84.81 54.03
185°C, 2.5%, 3 minutes, 30 rpm 38.41 ± 0.58 2.86 ± 0.87 93.20 64.19
185°C, 2.5%, 3 minutes, 50 rpm 40.93 ± 0.06 2.93 ± 0.16 96.50 62.00