Background: Xylo-oligosaccharide is the spotlight of functional sugar that improves economic benefits of lignocellulose biorefinery. Acetic acid acidolysis technology provides a promising application for xylo-oligosaccharide commercial production, but it is restricted by the aliphatic (wax-like) compounds, which cover the outer and inner surfaces of plants.
Results: We removed aliphatic compounds by extraction with two organic solvents. The benzene-ethanol extraction increased the yield of acidolyzed xylo-oligosaccharides of corncob, sugarcane bagasse, wheat straw, and poplar sawdust by 14.79%, 21.05%, 16.68%, and 7.26% while ethanol extraction increased it by 11.88%, 17.43%, 1.26%, and 13.64%, respectively.
Conclusion: The single ethanol extraction was safer, more environmentally-friendly and more cost-effective than benzene-ethanol solvent. In short, organic solvents extraction provided a promising auxiliary method for the selective acidolysis of herbaceous xylan to xylo-oligosaccharides, while it had minimal impact on woody poplar.
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This preprint is available for download as a PDF.
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Posted 23 Mar, 2021
On 30 Mar, 2021
Received 28 Mar, 2021
Received 27 Mar, 2021
On 23 Mar, 2021
Received 19 Mar, 2021
On 19 Mar, 2021
Invitations sent on 17 Mar, 2021
On 17 Mar, 2021
On 15 Mar, 2021
On 15 Mar, 2021
On 15 Mar, 2021
Posted 23 Mar, 2021
On 30 Mar, 2021
Received 28 Mar, 2021
Received 27 Mar, 2021
On 23 Mar, 2021
Received 19 Mar, 2021
On 19 Mar, 2021
Invitations sent on 17 Mar, 2021
On 17 Mar, 2021
On 15 Mar, 2021
On 15 Mar, 2021
On 15 Mar, 2021
Background: Xylo-oligosaccharide is the spotlight of functional sugar that improves economic benefits of lignocellulose biorefinery. Acetic acid acidolysis technology provides a promising application for xylo-oligosaccharide commercial production, but it is restricted by the aliphatic (wax-like) compounds, which cover the outer and inner surfaces of plants.
Results: We removed aliphatic compounds by extraction with two organic solvents. The benzene-ethanol extraction increased the yield of acidolyzed xylo-oligosaccharides of corncob, sugarcane bagasse, wheat straw, and poplar sawdust by 14.79%, 21.05%, 16.68%, and 7.26% while ethanol extraction increased it by 11.88%, 17.43%, 1.26%, and 13.64%, respectively.
Conclusion: The single ethanol extraction was safer, more environmentally-friendly and more cost-effective than benzene-ethanol solvent. In short, organic solvents extraction provided a promising auxiliary method for the selective acidolysis of herbaceous xylan to xylo-oligosaccharides, while it had minimal impact on woody poplar.
Figure 1
Figure 2
Figure 3
Figure 4
This preprint is available for download as a PDF.
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