Production and Characterization of Biobinders for Pavement from Unpretreated and Pretreated Lignocellulosic Biomass Sources

会议论文
发表日期：

2024年

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M. J. Castro-Alonso,
L. V. Espinosa,
K. Vasconcelos,
P. Franco Marcelino,
J. Dos Santos,
S. S. Da Silva,
L. L. Bernucci

摘要

Physicochemical properties of biobinders from slow pyrolysis of unpretreated and pretreated agricultural lignocellulosic biomass (sugarcane bagasse, straw, and rice husk) were analyzed. Results showed pH of ≤3, water content of 7–10%, and FTIR indicated phenols, ketones, and aromatics as the main constituents of biobinders. Rheological analysis revealed similar behavior of biobinders derived from pretreated sugarcane bagasse (Bio-SBc) and rice husk (Rio-RHc) compared to the neat petroleum-based asphalt binder (AC 30/45). Further characterization via GC-MS and TGA/DTG demonstrated distinct chemical composition and lower thermal stability of Bio-SBc and Bio-RHc compared to AC 30/45. Biobinders are constituted mainly by o-cresol, guaiacol, 3-ethylphenol, creosol and 4-ethylguaiacol with molecular weight distribution between 80–160 g/mol while AC 30/45 is predominantly composed of hydrocarbons.