Table 1 Pretreatment conditions and chemical composition of pretreated lignocellulosic substrates.

Corn stover

190°C, 5 minutes, 3% SO₂

0.8

0.2

55.1

12.0

1.9

18.9

SPCS

Corn fiber

190°C, 5 minutes, 4% SO₂

6.9

2.8

38.2

15.3

2.2

12.6

SPCS

Douglas fir

200°C, 5 minutes, 4% SO₂

BDL^g

BDL

50.6

0.4

1.0

47.0

SPDF

Lodgepole pine

200°C, 5 minutes, 4% SO2

BDL

BDL

52.4

0.6

1.0

45.9

SPLP

Ethanol-organosolv pretreatment

Corn fiber

170°C, 30 minutes; 65% EtOH, 0.75% H₂SO₄

2.1

1.6

57.9

11.5

3.0

15.7

OPCF

Poplar

195°C, 40 minutes; 70% EtOH, 1.0% H₂SO₄

BDL

BDL

77.0

6.0

2.4

16.0

OPP

Lodgepole pine

170°C, 60 minutes; 65% EtOH, 1.1% H₂SO₄

0.1

0.1

74.8

1.6

1.8

17.3

OPLP