Table 1 Composition of the pretreated corn cob and hemicellulosic liquors resultant of different hydrothermal treatments

Solid yield (g of pretreated corn cob/100 g of corn cob)

57

42

57

Pretreated corn cob composition (g of component/100 g of pretreated corn cob)

 Glucan

49.6 ± 0.60

63.32 ± 2.20

54.46 ± 1.59

 Xylan

10.05 ± 0.10

5.74 ± 0.12

10.80 ± 0.30

 Arabinan

1.21 ± 0.10

0.39 ± 0.02

0.66 ± 0.02

 Acetyl groups

0.53 ± 0.01

0.52 ± 0.06

0.87 ± 0.07

 Klason Lignin

19.4 ± 0.60

18.53 ± 0.56

21.58 ± 0.88

Liquid-phase composition (g/L)

 Liquors

29X_Pot

32X_Pot

54X_Pot

 Glucose

0.435 ± 0.012

0.353 ± 0.055

0.547 ± 0.023

 Xylose

2.00 ± 0.07

5.01 ± 0.02

5.49 ± 0.22

 Arabinose

1.46 ± 0.04

1.33 ± 0.02

2.37 ± 0.10

 Acetic acid

1.06 ± 0.04

1.59 ± 0.01

2.42 ± 0.08

 Hydroxymethylfurfural (HMF)

0.0734 ± 0.0024

0.123 ± 0.000

0.166 ± 0.007

 Furfural

0.408 ± 0.011

0.649 ± 0.000

1.40 ± 0.04

 Glucooligosaccharides

2.04 ± 0.06

1.86 ± 0.06

3.36 ± 0.04

 Xylooligosaccharides

26.5 ± 0.9

26.7 ± 0.9

48.8 ± 1.4

 Arabinooligosaccharides

1.63 ± 0.19

1.25 ± 0.06

2.43 ± 0.23

 Acetyl groups

2.29 ± 0.11

2.25 ± 0.14

4.6 ± 0.34