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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.)

Lignin surface area influenced by biomass heterogeneity and pretreatment process

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Author(s):
de Azevedo, Gabriel Oliveira [1] ; Shimizu, Felipe Lange [1] ; Fontes, Luciana Coelho [2] ; Contiero, Jonas [2] ; Brienzo, Michel [1]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo State UNESP, Inst Res Bioenergy IPBEN, BR-13500230 Rio Claro, SP - Brazil
[2] Univ Sao Paulo State UNESP, Biochem & Microbiol Dept, BR-13500230 Rio Claro, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: BIOMASS CONVERSION AND BIOREFINERY; JAN 2022.
Web of Science Citations: 0
Abstract

Biomass conversion is challenged by the heterogeneity and lignin, a component that acts as a barrier to the enzymatic hydrolysis of polysaccharides. This study evaluated the effect of pretreatments on different fractions of sugarcane biomass lignin and cellulose exposure. Two different methods were used: dilute sulfuric acid (5%, 10%, and 20% w/w at 121 degrees C/30 min) and partial delignification with sodium chlorite (30% m/m at 70 degrees C/1 h) to reduce the exposed surface of lignin. The surface area of lignin was obtained through the cationic dye Azure B, and cellulose access by enzymatic hydrolysis (15 FPU/g for 24 h-Cellic Cetec 2-Novozymes) was employed. Acid pretreatment was efficient in hemicellulose removal, and delignification removed lignin from all the biomasses fractions. Azure B dyes determined the surface area filled with lignin after dilute sulfuric acid pretreatment and partial delignification. The sample with the largest total surface area of lignin (52 m(2)/g of material) was the leaf pretreated with 5% sulfuric acid. The external fraction presented the largest specific surface area (240 m(2)/g) after partial delignification. These results indicate that reducing the lignin surface area enhances the glucose yield of enzymatic hydrolysis. (AU)

FAPESP's process: 17/22401-8 - Fruit-refinery: obtention processes, characterization methods and generation of products derived from residues of the fruitculture
Grantee:Nelson Ramos Stradiotto
Support Opportunities: Research Projects - Thematic Grants