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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.)

Investigation into the physical-chemical properties of chemically pretreated sugarcane bagasse

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Author(s):
Cruz, Glauber [1, 2] ; Santiago, Patricia A. [1] ; Braz, Carlos E. M. [3] ; Seleghim, Jr., Paulo [1] ; Crnkovic, Paula Manoel [1]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Engn Sch Sao Carlos, Dept Mech Engn, Thermal Engn & Fluids Lab, Ave Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos, SP - Brazil
[2] Univ Fed Maranhao, Dept Mech Engn, Ave Portugueses 1966, BR-65080805 Sao Luis, Maranhao - Brazil
[3] Univ Fed Sao Carlos, Dept Chem, Rodovia Washington Luis Km 235, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY; v. 132, n. 2, p. 1039-1053, MAY 2018.
Web of Science Citations: 5
Abstract

Enzymatic hydrolysis is one of the major steps involved in the conversion of sugarcane bagasse into ethanol. Pretreatments break down macrostructures in order to improve the enzyme access to the targeted glycosidic bonds. This study reports on the use of thermoanalytic techniques together with other different techniques for the verification of the structural and morphological changes occurred in sugarcane bagasse subjected to acid and alkaline pretreatments. The techniques evaluated differences in the BET and BJH surface areas, diameter and pore volume investigated by porosimetry, scanning electron microscopy and wettability. Thermal analysis (TG/DTG and DTA) was also used to evaluate the thermal degradation of hemicelluloses, cellulose and lignin contents that remained in the samples after pretreatments. The results show that chemical pretreatments were effective in the degradation of lignocellulosic samples and significant morphological changes occurred after the pretreatments. Acid and alkaline pretreatments caused an increase in the surface area, diameter and volume of pores. Wettability also revealed important effects regarding surface changes of the biomasses. In summary, all tested pretreatments were effective to chemically degrade the macrostructures of sugarcane bagasse that hinder enzymatic hydrolysis in, for instance, the second-generation ethanol production. {[}GRAPHICS] . (AU)

FAPESP's process: 10/20681-4 - Design and development of an enzyme reactor for production of ethanol from sugarcane bagasse-cane
Grantee:Patrícia Aparecida Santiago
Support Opportunities: Scholarships in Brazil - Post-Doctoral