Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
KINECT STUDY OF SUGARCANE BAGASSE COMPOUNDS IN INERT AND OXIDANT ATMOSPHERE
Submission Author:
Miriam Ricciulli de Oliveira , SP
Co-Authors:
Miriam Ricciulli de Oliveira, Gretta Larisa Aurora Arce Ferrufino, Carlos Maciel, Ivonete Ávila
Presenter: Miriam Ricciulli de Oliveira
doi://10.26678/ABCM.COBEM2023.COB2023-0162
Abstract
Due to the environmental impact caused by the use of fossil fuels in energy generation, biomass has been emphasised as an alternative energy source, because it is clean, renewable, and abundant in the environment, and can also being obtained from agro-industrial residues, demonstrating itself as an important model of sustainable energy. It can be converted into fuel by thermal conversion processes such as pyrolysis, gasification and combustion and the efficiency of these processes depends on it composition and physicochemical properties, such as reactivity, which vary according to the species and part of the plant used. Due to this variability, it is important to perform an accurate characterization of the material. Lignocellulosic biomass consists mainly of 3 polymers called cellulose, hemicellulose and lignin, which can be isolated by different chemical treatments promoting the breakdown of biomass polymeric matrix, such as the bleaching process with uses hydrogen peroxide in an alkaline medium and the process of organosolv pulping. Thermogravimetric analysis is commonly used to analyze the thermal behavior of biomass and its constituents, simulating the conversion processes, obtaining a curve that records the mass loss over time (TGA) and the derivative of this curve (DTG). This work focus on carry out a kinetic study of the chemically isolated components of sugarcane bagasse through the TGA/DTG curves in an oxidizing atmosphere (20%O2 and 80%N2) and in an inert atmosphere (N2). The thermogravimetric tests were carried out in the temperature ranging from 30 to 600°C, with heating rates of 10, 20 and 30°C/min for both atmospheres. The data obtained from the curves were applied in the mathematical model KAS (Kissinger-Akahira-Sunose), which allowed to determine the activation energy for different degrees of conversion of each isolated component of the biomass in both atmosphere. Theses results contribute to better understand the mechanisms of conversion of biomass compounds and to improve the efficiency of the conversion processes.
Keywords
Biomass, TGA, Sugarcane bagasse, Kinetics analysis
