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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.)

ffect of Protic Ionic Liquids in Sugar Cane Bagasse Pretreatment for Lignin Valorization and Ethanol Productio

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Author(s):
Pin, Thaynara C. [1, 2] ; Rabelo, Sarita C. [3] ; Pu, Yunqiao [4] ; Ragauskas, Arthur J. [2, 4, 5] ; Costa, Aline C. [1]
Total Authors: 5
Affiliation:
[1] State Univ Campinas UNICAMP, Sch Chem Engn, BR-13083852 Campinas, SP - Brazil
[2] Univ Tennessee, Dept Chem & Biomol Engn, Knoxville, TN 37916 - USA
[3] Sa Paulo State Univ UNESP, Sch Agr, Dept Bioproc & Biotechnol, BR-18610034 Botucatu, SP - Brazil
[4] Oak Ridge Natl Lab ORNL, Joint Inst Biol Sci, Biosci Div, Oak Ridge, TN 37831 - USA
[5] Univ Tennessee, Inst Agr, Dept Forestry Wildlife & Fisheries, Ctr Renewable Carbon, Knoxville, TN 37996 - USA
Total Affiliations: 5
Document type: Journal article
Source: ACS SUSTAINABLE CHEMISTRY & ENGINEERING; v. 9, n. 50, p. 16965-16976, DEC 20 2021.
Web of Science Citations: 0
Abstract

Ionic liquids have been called designer solvents because it is possible to fine-tune their properties from a huge range of possible combinations of cations and anions. In this work, we evaluate the potential of protic ionic liquids (PILs) in the fractionation of sugar cane bagasse in a biorefinery context. The PILs were designed to selectively solubilize lignin and leave a polysaccharides solid fraction. The carbohydrate fraction was further hydrolyzed to obtain pentose and hexose sugars, which were fermented using a pentose-consuming yeast. The results have shown that, differently from pretreatments that solubilize hemicelluloses, pentoses could be fermented together with hexoses without a prior detoxification step with high yield and productivity. The lignin recovered was characterized by 2D HSQC NMR, P-31 NMR, and GPC, showing that the design of the PIL influences lignin characteristics, but pretreatment temperature and time do not. The lignins obtained are sulfur-free, and the richness of their functional groups makes them attractive for conversion into a diversity of value-added products, which can make a biorefinery based on the proposed process viable. (AU)

FAPESP's process: 15/20630-4 - Biorefinery development integrated to a bioethanol sugar cane plant with zero CO2 emission: routes to convert renewable resources to bio-products and bio-electricity
Grantee:Rubens Maciel Filho
Support Opportunities: Research Projects - Thematic Grants