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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Alkaline Pretreatment Severity Leads to Different Lignin Applications in Sugar Cane Biorefineries

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Author(s):
de Menezes, Fabricia Farias ; Rencoret, Jorge ; Nakanishi, Simone Coelho ; Nascimento, Viviane Marcos ; Nunes Silva, Vinicius Fernandes ; Gutierrez, Ana ; del Rio, Jose C. ; de Moraes Rocha, George Jackson
Total Authors: 8
Document type: Journal article
Source: ACS SUSTAINABLE CHEMISTRY & ENGINEERING; v. 5, n. 7, p. 5702-5712, JUL 2017.
Web of Science Citations: 12
Abstract

Lignin, a multifunctional major biomass component, has a prominent potential as feedstock to be converted into high value-added products. Lignin is available in high amounts as side streams during cellulosic ethanol production, and within the biorefinery context, it is important to assess its structural characteristics in order to explore its potential to replace some petroleum-based reactants. In this study, some important features were evaluated for different lignins such as lignin purity and the amounts of syringyl (s), guaiacyl (G), and p-hydroxyphenyl (H) units. Four alkaline lignins, generated from a pilot-scale pretreatment of sugar cane bagasse (NaOH 1.5%, 30 min), were evaluated according to the severity of the alkaline pretreatment (130 or 170 degrees C, with or without the addition of anthraquinone). The different pretreatments produced lignins with different chemical characteristics that can be used for different purposes in sugar cane biorefineries. As the severity of alkaline pretreatment increased, the recovered lignins presented higher amounts of H- and lower amounts of S-lignin units. In particular, the lignin obtained at 170 degrees C with the addition of anthraquinone presented the highest content of H- and the lowest content of S-lignin units, which would present higher reactivity toward formaldehyde in phenolic resins. (AU)

FAPESP's process: 13/11961-1 - Scale up study of sugarcane bagasse pre-treatment process for second generation ethanol production
Grantee:Simone Coelho Nakanishi
Support Opportunities: Scholarships in Brazil - Doctorate