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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.)

Evolution of cellulose crystals during prehydrolysis and soda delignification of sugarcane lignocellulose

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Author(s):
Driemeier, Carlos [1] ; Pimenta, Maria T. B. [1] ; Rocha, George J. M. [2, 1] ; Oliveira, Marcelo M. [1] ; Mello, Danilo B. [1] ; Maziero, Priscila [2] ; Goncalves, Adilson R. [2]
Total Authors: 7
Affiliation:
[1] Bioetanol, CTBE, Lab Nacl Ciencia & Tecnol, BR-13083970 Campinas, SP - Brazil
[2] Univ Sao Paulo, Dept Biotecnol, Escola Engn Lorena, BR-12602810 Sao Paulo - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Cellulose; v. 18, n. 6, p. 1509-1519, DEC 2011.
Web of Science Citations: 39
Abstract

This work investigates the evolution of cellulose crystals from sugarcane lignocellulose (bagasse and leaves) submitted to prehydrolysis (hydrothermal, dilute acid, or steam explosion) and soda delignifications. Raw and treated materials are characterized by X-ray diffraction with modeling of area-detector patterns. Three treatment effects are correlated: increase in cellulose content, quantified by strong acid hydrolysis; increase in average cellulose crystallite width, inferred from sharper 200 diffraction peaks; and decrease in crystallite distortion, evidenced by d(200)-spacing approaching reference values. Crystal contents measured according to recent developments (in Driemeier and Calligaris, J Appl Cryst 44: 184-192, 2011) are compared to cellulose contents. Limitations for this comparison are discussed. Results are consistent with minimum non-crystalline cellulose in raw lignocellulose, and with partial cellulose decrystallization or more defective crystallites in treated materials. (AU)

FAPESP's process: 10/08691-4 - Organosolv delignification of sugarcane bagasse combined with physical-mechanical processes
Grantee:Maria Teresa Borges Pimenta Barbosa
Support Opportunities: Research Grants - Young Investigators Grants
FAPESP's process: 10/05523-3 - Nanomorphologic changes of sugarcane lignocellulosic matter
Grantee:Carlos Eduardo Driemeier
Support Opportunities: Research Grants - Young Investigators Grants