Journal
INDUSTRIAL CROPS AND PRODUCTS
Volume 74, Issue -, Pages 810-816Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.indcrop.2015.05.074
Keywords
Steam explosion; Diluted sulfuric acid; Pilot scale; Sugarcane bagasse; Hydrolysis kinetics; Compositional factor
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Pilot-scale pretreatments, namely steam explosion (SE) and diluted sulfuric acid (SA), of sugarcane bagasse followed by alkaline delignification (SED and SAD) were explored. Most of the pentosan (97% and 93%), and the lignin content were solubilized during pretreatment and delignification process for SE and SA, respectively. SE demanded 50% more NaOH in the delignification step than SA, due to ion exchange nature of cellulignin. SE is more advantageous than SAD due to better unpacking of the fibers, allowing a higher cellulose conversion (90%) in relation to SAD pulps (79%). Cellulose conversion has a direct dependence with cellulose, hemicellulose and residual lignin. A composition factor (H*L/CC) and enzymatic kinetics were evaluated for the in natura, pretreated and pretreated and delignified materials. The Langmuir isothermal- type equation expressed a factor related to the capacity of hydrolysis, where SE pointed a material with similar hydrolysis capability of the combined SAD pretreatment. (C) 2015 Elsevier B.V. All rights reserved.
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