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

Autor(es)

Pin, Thaynara C. ^{[1, 2]} ; Rabelo, Sarita C. ^[3] ; Pu, Yunqiao ^[4] ; Ragauskas, Arthur J. ^{[2, 4, 5]} ; Costa, Aline C. ^[1]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: ACS SUSTAINABLE CHEMISTRY & ENGINEERING; v. 9, n. 50, p. 16965-16976, DEC 20 2021.
• Citações Web of Science: 0

Resumo

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)

• Processo FAPESP: 15/20630-4 - Desenvolvimento integrado de biorrefinaria e planta de bioetanol de cana-de-açúcar com emissão zero de CO2: rotas para converter recursos renováveis em bioprodutos e bioeletricidade
• Beneficiário: Rubens Maciel Filho
• Modalidade de apoio: Auxílio à Pesquisa - Temático