Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
ENERGY DENSIFICATION OF SUGARCANE BAGASSE BRIQUETTE THROUGH OXIDATIVE TORREFACTION IN MINERAL LAYER
Submission Author:
Juan Pablo Arteaga Ramos , SP , Brazil
Co-Authors:
Juan Pablo Arteaga Ramos, Gabriel Alexandre Pio, Bruno Silva, José Caraschi, Carlos Manuel Romero Luna, Ivonete Ávila
Presenter: Juan Pablo Arteaga Ramos
doi://10.26678/ABCM.COBEM2023.COB2023-1371
Abstract
Energy demand is constantly growing as population increases, development improves, and quality of life improves. Almost 80% of the energy demand is supplied by fossil fuels, but with the new indications and objectives proposed at the COP, an attempt is made to reduce this percentage. Due to this, renewable energies have gained much more relevance, among them biomass reaching a 10% share of this energy demand. In Brazil, the sugarcane harvest in 2021 had a productivity of approximately 716 million tons. Considering that some studies estimate that the production of sugarcane bagasse (SB) is an average of 300kg/ton, it is estimated that 215 million tons of SB are generated. With this BCA production, it is necessary to have a continuous improvement in its use for a greater production of energy, and since biomass presents challenges in its implementation due to its inherent properties. A process that can improve its use is torrefaction. This pre-treatment process, where the material is generally heated in an inert medium, considering a range of 200 to 300 °C in a residence time. Torrefaction seeks to improve the properties of biomass, making it hydrophobic and with greater calorific value and energy density, among other characteristics. However, torrefaction needs the injection of a carrier gas such as nitrogen, which has a cost and directly influences the cost of torrefaction. Currently, the literature presents oxidative torrefaction in an inert mineral layer. In this type of torrefaction, there is no need for a carrier gas stream, since the inert mineral layer has the function of limiting the access of oxygen in the air to the sample inside a reactor, it also has advantages such as better heat distribution. In this work, silica sand was used to study the oxidative roasting of SB briquettes in an inert mineral layer. The effect of temperature (200 – 300 °C), residence time 30 min and the height of the inert mineral layer 3 cm were evaluated. The results demonstrate that oxidative torrefaction improves the energy properties of the briquette, resulting in an increase in mass yield and calorific value, which would result in a better use of this biomass.
Keywords
Oxidative torrefaction, Sugarcane bagasse, Briquette
