TY - JOUR
T1 - Chemical pretreatment of corncob for the selective dissolution of hemicellulose and lignin
T2 - influence of pretreatment on the chemical, morphological and thermal features
AU - Ramírez-Estrada, Alejandro
AU - Mena-Cervantes, Violeta Y.
AU - Elizalde-Martínez, Ignacio
AU - Pineda-Flores, Gabriel
AU - Hernández-Altamirano, Raúl
N1 - Publisher Copyright:
© 2023 Informa UK Limited, trading as Taylor & Francis Group.
PY - 2024
Y1 - 2024
N2 - The aim of this work was to remove the hemicellulose and lignin fraction from corncob using chemical pretreatments, and to stablish the effect of that on the composition, microstructure, and thermal properties of corncob. The biomass was pretreated with H2SO4 and NaOH solution to dissolve hemicellulose and lignin portion. Likewise, the biomass pretreated was characterized by scanning electron microscope, IR spectroscopy and TGA methods. It was found that the acid pretreatment disrupt the hemicellulose structure by hydrolysis of glycoside bonds. Moreover, the corncob morphology becomes flaky after acid pretreatment due to dissolution of hemicellulose. The lignin is removed during alkaline pretreatment by solvation of aryl groups. In addition, the crystalline morphology of cellulose fibers was disrupted, increasing the surface area. The pretreatment of corncob with 1.0% H2SO4 and 0.1 M NaOH solubilized ∼42.6% and ∼20.9% of the biomass, respectively. The soluble products were analyzed by FTIR, Fehling test, and calorimetric analysis, to stablish their composition and heat content. The hydrolysis of hemicellulose leads to the release of the monomeric sugars and soluble oligomers. Moreover, the lignin of corncob releases more energy per unit of mass, making it an energy-denser component of corncob.
AB - The aim of this work was to remove the hemicellulose and lignin fraction from corncob using chemical pretreatments, and to stablish the effect of that on the composition, microstructure, and thermal properties of corncob. The biomass was pretreated with H2SO4 and NaOH solution to dissolve hemicellulose and lignin portion. Likewise, the biomass pretreated was characterized by scanning electron microscope, IR spectroscopy and TGA methods. It was found that the acid pretreatment disrupt the hemicellulose structure by hydrolysis of glycoside bonds. Moreover, the corncob morphology becomes flaky after acid pretreatment due to dissolution of hemicellulose. The lignin is removed during alkaline pretreatment by solvation of aryl groups. In addition, the crystalline morphology of cellulose fibers was disrupted, increasing the surface area. The pretreatment of corncob with 1.0% H2SO4 and 0.1 M NaOH solubilized ∼42.6% and ∼20.9% of the biomass, respectively. The soluble products were analyzed by FTIR, Fehling test, and calorimetric analysis, to stablish their composition and heat content. The hydrolysis of hemicellulose leads to the release of the monomeric sugars and soluble oligomers. Moreover, the lignin of corncob releases more energy per unit of mass, making it an energy-denser component of corncob.
KW - Hemicellulose hydrolysis
KW - cellulose recovery
KW - crystal disruption
KW - ethanol
KW - lignin dissolution
UR - http://www.scopus.com/inward/record.url?scp=85161580523&partnerID=8YFLogxK
U2 - 10.1080/17597269.2023.2219484
DO - 10.1080/17597269.2023.2219484
M3 - Artículo
AN - SCOPUS:85161580523
SN - 1759-7269
VL - 15
SP - 89
EP - 103
JO - Biofuels
JF - Biofuels
IS - 1
ER -