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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Combined approaches to obtain cellulose nanocrystals, nanofibrils and fermentable sugars from elephant grass

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Autor(es):
Nascimento, Sandra A. [1] ; Rezende, Camila A. [1]
Número total de Autores: 2
Afiliação do(s) autor(es):
[1] Univ Estadual Campinas, UNICAMP, Inst Chem, POB 6154, BR-13083970 Campinas, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: Carbohydrate Polymers; v. 180, p. 38-45, JAN 15 2018.
Citações Web of Science: 5
Resumo

This work is focused in methodologies to obtain cellulose nanocrystals, cellulose nanofibrils, soluble lignin and fermentable sugars from elephant grass, aiming a more integral use of this biomass. To improve hydrolysis, three different pretreatments for biomass delignification and bleaching were compared: 1. Concentrated alkaline peroxide (CP); 2. Diluted alkaline peroxide (DP); and 3. Acid-alkali (AA) pretreatment. Cellulose nanocrystals were obtained from elephant grass leaves by acid hydrolysis, with a 12-16% w/w yield considering the initial biomass weight, and presented high crystallinity index (CI = 72-77%) and aspect ratios (30-44), depending on the pretreatment approach. Together with the cellulose nanocrystals, other useful by-products were obtained, such as cellulose nanofibrils (3.8%-9.7% w/w yield), extractives (12.3%), liquors rich in hydrolysed lignin (16.0-21.1%) and sugars (22.1-25.2%). The results presented herewith should contribute to the economic viability and the sustainability of this biomass fractionation process. (AU)

Processo FAPESP: 16/13602-7 - Estudo sobre estratégias para o aproveitamento integral da biomassa lignocelulósica
Beneficiário:Camila Alves de Rezende
Linha de fomento: Auxílio à Pesquisa - Programa BIOEN - Regular