Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
DRY TORREFACTION OF SUGARCANE BAGASSE USING CARBON DIOXIDE AS GAS CARRIER
Submission Author:
Carlos Manuel Romero Luna , SP , Brazil
Co-Authors:
Juan Pablo Arteaga Ramos, Claudinei Henrique Ferreira Rodrigues, Bruna de Jesus Bueno Machado, Carlos Manuel Romero Luna, Gretta Larisa Aurora Arce Ferrufino, José Caraschi
Presenter: Juan Pablo Arteaga Ramos
doi://10.26678/ABCM.COBEM2021.COB2021-2307
Abstract
Emissions of greenhouse gases (GHGs) and other pollutants have increased considerably over the past decades due to the continued use of energy derived from fossil fuels. This has led to problems and environmental impacts that motivate the use of clean and renewable energy sources and unconventional combustion processes. Biomass is a renewable source and has great potential for CO2 neutral energy generation. Among all the alternatives for the use of biomass, thermochemical conversion processes are the most efficient. However, biomass has many disadvantages such as low calorific value, high moisture content, among others. These disadvantages can reduce the efficiency of these processes. Torrefaction is the process of heat treatment of biomass in an inert medium, which can improve these disadvantages. There are several studies in the literature on the torrefaction of biomass, demonstrating the significant improvement in the properties of biomass. There are several studies on the torrefaction of sugarcane bagasse that demonstrate a significant improvement in its properties, however, there are few studies on the use of other gases carriers such as carbon dioxide. Sugarcane bagasse is a resource available in Brazil, productivity tends to increase to satisfy the demand for ethanol. Thus, more bagasse is available. Sugarcane bagasse is currently used as a fuel to produce thermal and electrical energy, however up to 18% of the bagasse is lost through bacterial decomposition. The insertion of the torrefaction in the cogeneration plants could improve and preserve the properties of the biomass until the moment of its burning. In this work, the torrefaction of the sugarcane bagasse will be carried out between 200 and 300 °C, considering a time of 30 minutes and using carbon dioxide as the carrier gas. Preliminary results indicate that the mass yield obtained from torrefaction using carbon dioxide is slightly lower when compared to torrefaction using nitrogen. The calorific value obtained using carbon dioxide is slightly higher.
Keywords
Torrefaction, Sugarcane bagasse, Carbon dioxide
