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Table 1 Overview of pretreatment experiments and experimental conditions

From: Pilot-scale steam explosion pretreatment with 2-naphthol to overcome high softwood recalcitrance

2-Naphthol addition

T/°C

t/min

logR 0/−

Δp explosion/bar

235

2.5

4.4

30

235

5

4.7

30

235

10

5.0

30

235

15

5.2

30

235

20

5.3

30

Mixing

235

2.5

4.4

30

Mixing

235

5

4.7

30

Mixing

235

10

5.0

30

Mixing

235

15

5.2

30

Mixing

235

20

5.3

30

Mixing

235

2.5

4.4

2.5*

Mixing

235

5

4.7

2.5*

Mixing

235

10

5.0

2.5*

Mixing

235

15

5.2

2.5*

Mixing

235

20

5.3

2.5*

Acetone impregnation

235

2.5

4.4

30

Acetone impregnation

235

5

4.7

30

Acetone impregnation

235

10

5.0

30

Acetone impregnation

235

15

5.2

30

Acetone impregnation

235

20

5.3

30

Ethanol impregnation

235

2.5

4.4

30

Ethanol impregnation

235

5

4.7

30

Ethanol impregnation

235

10

5.0

30

Ethanol impregnation

235

15

5.2

30

Ethanol impregnation

235

20

5.3

30

  1. * Experiments with a Δp of 2.5 bar are referred to as experiments “without explosion”