Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/5132
Title: Characterization of depolymerized residues from extremely low acid hydrolysis (ELA) of sugarcane bagasse cellulose : effects of degree of polymerization, crystallinity and crystallite size on thermal decomposition.
Authors: Gurgel, Leandro Vinícius Alves
Marabezi, Karen
Ramos, Luiz Antonio
Curvelo, Antonio Aprigio da Silva
Keywords: Sugarcane bagasse
Thermal decomposition
Microcrystalline cellulose
Acid hydrolysis
Issue Date: 2012
Citation: GURGEL, L. V. A. et al. Characterization of depolymerized residues from extremely low acid hydrolysis (ELA) of sugarcane bagasse cellulose: effects of degree of polymerization, crystallinity and crystallite size on thermal decomposition. Industrial Crops and Products, v. 36, p. 560-571, 2012. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0926669011004365>. Acesso em: 02 fev. 2015.
Abstract: Sugarcane bagasse cellulose was subjected to the extremely low acid (ELA) hydrolysis in 0.07% H2SO4 at 190, 210 and 225 ◦C for various times. The cellulose residues from this process were characterized by TGA, XRD, GPC, FTIR and SEM. A kinetic study of thermal decomposition of the residues was also carried out, using theASTMand Kissinger methods. The thermal studies revealed that residues of cellulose hydrolyzed at 190, 210 and 225 ◦C for 80, 40 and 8 min have initial decomposition temperature and activation energy for the main decomposition step similar to those of Avicel PH-101. XRD studies confirmed this finding by showing that these cellulose residues are similar to Avicel in crystallinity index and crystallite size in relation to the 110 and 200 planes. FTIR spectra revealed no significant changes in the cellulose chemical structure and analysis of SEM micrographs demonstrated that the particle size of the cellulose residues hydrolyzed at 190 and 210 ◦C were similar to that of Avicel.
URI: http://www.repositorio.ufop.br/handle/123456789/5132
metadata.dc.identifier.doi: https://doi.org/10.1016/j.indcrop.2011.11.009
ISSN: 0926-6690
metadata.dc.rights.license: O periódico Industrial Crops and Products concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3581990039975.
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