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Optimization of sulfuric acid-assisted glycerol pretreatment of sugarcane bagasse
Department of Chemistry and Chemical Engineering, University of Matanzas, 44740 Matanzas, Cuba.
2013 (English)Other (Other academic)
Abstract [en]

A combined pretreatment of sugarcane bagasse with glycerol and sulfuric acid was investigated based on a central composite rotatable experimental design. The following factors were varied: temperature (150–199°C), time (0.69–2.3 h), H2SO4 concentration (0.0–1.1%), and glycerol concentration (55.4–79.6%). Xylans and lignin were considerably solubilized during pretreatment. Xylan solubilization, ranging between 6% and 94%, increased significantly with the increase of temperature, time, and H2SO4 concentration and dropped with the increase of glycerol amount. Glycerol restricted the solubilization and full hydrolysis of xylans and the degradation of xylose. Lignin solubilization (20.6–49.4%) increased with the increase of all the experimental factors. Cellulose recovery, which was generally high, increased with the increasing of glycerol concentration and declined at high levels of the other factors. Recoveries above 97% were achieved at low H2SO4 concentration and high glycerol load, whereas the lowest value (83.4%) was achieved in the longest-lasting experiment. The models based on the experimental results predicted the maximal lignin solubilization at 187.7°C, 2.3 h, 79.6% glycerol, and 0.64% H2SO4, whereas the highest yield of enzymatic hydrolysis can be expected at 194.1°C, 1.67 h, 79.6% glycerol, and 1.1% H2SO4. The optimal conditions were confirmed in control experiments. The synergistic effect of sulfuric acid and glycerol on the enzymatic hydrolysis of cellulose was demonstrated.

Place, publisher, year, pages
De Gruyter Open, 2013. Vol. 67
Keyword [en]
cellulose hydrolysis, ethanol, glycerol, pre- treatment, sugarcane bagasse
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:umu:diva-128818DOI: 10.1515/hf-2012-0179OAI: oai:DiVA.org:umu-128818DiVA: diva2:1056728
Note

5

Available from: 2016-12-15 Created: 2016-12-15 Last updated: 2016-12-15

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Publisher's full texthttp:////www.degruyter.com/view/j/hfsg.2013.67.issue-5/hf-2012-0179/hf-2012-0179.xml

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Martín, Carlos
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CiteExportLink to record
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Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
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Language
  • de-DE
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