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Polymers 2018, 10(10), 1149; https://doi.org/10.3390/polym10101149

Novel Kinetic Models of Xylan Dissolution and Degradation during Ethanol Based Auto-Catalyzed Organosolv Pretreatment of Bamboo

1
College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China
2
Department of Civil and Environmental Engineering, Brunel University London, Kingston Lane, Uxbridge UB8 3PH, UK
*
Authors to whom correspondence should be addressed.
Received: 25 September 2018 / Revised: 8 October 2018 / Accepted: 12 October 2018 / Published: 15 October 2018
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Abstract

Due to the invalidity of traditional models, pretreatment conditions dependent parameter of susceptible dissolution degree of xylan (dX) was introduced into the kinetic models. After the introduction of dX, the dissolution of xylan, and the formation of xylo-oligosaccharides and xylose during ethanol based auto-catalyzed organosolv (EACO) pretreatments of bamboo were well predicted by the pseudo first-order kinetic models (R2 > 97%). The parameter of dX was verified to be a variable dependent of EACO pretreatment conditions (such as solvent content in pretreatment liquor and pretreatment temperature). Based on the established kinetic models of xylan dissolution, the dissolution of glucan and the formation of degradation products (furfural and acetic acid) could also be empirically modeled (R2 > 97%). In addition, the relationship between xylan and lignin removal can provide guidance for alleviating the depositions of lignin or pseudo-lignin. The parameter of dX derived novel kinetic models can not only be used to reveal the multi-step reaction mechanisms of xylan, but also control the final removal of main components in bamboo during EACO pretreatments, indicating scientific and practical significance for governing the biorefinery of woody biomass. View Full-Text
Keywords: kinetic models; xylan; susceptible dissolution degree (dX); ethanol based auto-catalyzed organosolv (EACO) pretreatment; bamboo kinetic models; xylan; susceptible dissolution degree (dX); ethanol based auto-catalyzed organosolv (EACO) pretreatment; bamboo
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Liu, J.; Gong, Z.; Yang, G.; Chen, L.; Huang, L.; Zhou, Y.; Luo, X. Novel Kinetic Models of Xylan Dissolution and Degradation during Ethanol Based Auto-Catalyzed Organosolv Pretreatment of Bamboo. Polymers 2018, 10, 1149.

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