Skip to main content

Table 2 Effects of deacetylation and pretreatment residence times on acetate release from solubilized xylooligomers

From: The impacts of deacetylation prior to dilute acid pretreatment on the bioethanol process

a

Kramer 34M95

Pretreatment residence times (min)

Free acetate/xylose monomer (mol/mol)

Free acetate/total solubilized xylose monomer (mol/mol)*

Bound acetate/xylose oligomer

Total acetate/total solubilized xylan** (mol/mol)

 

Control

5

0.20

0.20

0.46

0.36

  

10

0.21

0.21

0.57

0.36

  

20

0.27

0.26

0.72

0.38

 

Deacetylated

5

0.04

0.04

0.27

0.10

  

10

0.07

0.07

0.33

0.11

  

20

0.10

0.09

0.34

0.12

b

Kramer 33B51

Pretreatment residence times (min)

Free acetate/xylose monomer (mol/mol)

Free acetate/total solubilized xylose monomer (mol/mol)*

Bound acetate/xylose oligomer

Total acetate/total solubilized xylan** (mol/mol)

 

Control

5

0.17

0.17

0.45

0.34

  

10

0.19

0.19

0.55

0.35

  

20

0.25

0.25

0.69

0.39

 

Deacetylated

5

0.05

0.04

0.30

0.11

  

10

0.08

0.07

0.34

0.11

  

20

0.11

0.10

0.40

0.14

  1. *total solubilized xylose monomer consists of solubilized xylose in monomer form and in degraded form (furfural)
  2. **total solubilized xylan consists of xylose monomer, xylose oligomer and furfural