STUDY OF THE PYROLYSIS CONDITIONS OF THE BURITI EXTRACTION RESIDUE
DOI:
https://doi.org/10.66104/k9c7j261Keywords:
Pyrolysis; Biochar; Bio-oil; Buriti Biomass; Thermal Degradation and Yield.Abstract
This study investigated the pyrolysis of buriti biomass with the aim of optimizing the production of two important byproducts: biochar and bio-oil. For this purpose, experiments were carried out in a pyrolysis reactor, varying temperatures between 450 °C and 600 °C and process times from 10 to 60 minutes. Thermogravimetric analysis (TGA) revealed the different stages of thermal degradation of buriti biomass. Initially, a 10% weight loss between 10 °C and 200 °C was associated with the evaporation of water present in the biomass. Subsequently, between 200 °C and 400 °C, a 45% loss occurred, correlated with the decomposition of hemicellulose, cellulose and lignin, the main components of lignocellulosic biomass. The highest biochar yield was obtained at 450 °C for 30 minutes of pyrolysis (30.75%), while the highest bio-oil yield was achieved at 525 °C for 60 minutes (48.98%). Analysis of variance (ANOVA) demonstrated that temperature significantly influenced the biochar yield, while time was the main factor for the increase in bio-oil yield. The generated bio-oil presented a higher calorific value (PCS) of 10.68 MJ/kg, while biochar presented a significantly higher PCS of 30.664 MJ kg-1, evidencing its greater energy efficiency. FTIR spectroscopic analysis revealed the presence of functional groups such as phenols, alcohols and aliphatic compounds, confirming the chemical complexity of the biomass. The adjusted surface analyses, both in 3D and 2D, indicated that lower temperatures favor the production of biochar, while higher temperatures and longer times are more effective for obtaining bio-oil. These results suggest that the pyrolysis of buriti biomass can be optimized for the efficient production of both by-products, providing a sustainable route for the valorization of this biomass.
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