Structural features of protic ionic liquids and their impact on pretreatment performance for 2G ethanol production

Autor(es)

Pin, Thaynara C. ^[1] ; Nakasu, Pedro S. Y. ^[1] ; Rabelo, Sarita C. ^[2] ; Costa, Aline C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Chem Engn Sch, UNICAMP, Av Albert Einstein 500, BR-13083852 Campinas, SP - Brazil

^[2] Sao Paulo State Univ UNESP, Coll Agr Sci, Dept Bioproc & Biotechnol, Av Univ 3780, BR-18610034 Botucatu, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ENERGY; v. 235, NOV 15 2021.
• Citações Web of Science: 0

Resumo

Biomass pretreatment with protic ionic liquids (PILs) is a promising source of renewable energy and bioproducts, in which different cation/anion combinations may present different behavior towards biomass modification such as selective lignin and/or carbohydrate solubilization. The potential of 20 PILs as pretreatment agents was investigated, whose cations presented two different functional groups and different carbon chain lengths. The best solvent in terms of lignin solubilization during pretreatment was obtained by cations with a functional group (-OH and -NH2). High cellulose conversion was obtained with ethanolamine and ethylenediamine monoacetate ({[}2He]{[}Ac] and {[}Etid]{[}Ac]), under different pretreatment conditions (175 degrees C and 140 degrees C for 2 h, respectively). The presence of an alkaline anion and a functionalized cation enhanced the pretreatment effectiveness. The results presented in this work will be useful to design novel protic ionic liquids for pretreatment applications in biofuel processes, which can also be integrated to produce bioproducts within the biorefinery concept. (C) 2021 Elsevier Ltd. All rights reserved. (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
• Processo FAPESP: 16/06142-0 - Estratégias para melhorar o desempenho do processo de produção de etanol de segunda geração
• Beneficiário: Aline Carvalho da Costa
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Regular