Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
HYBRIDIZATION OF ENERGY SOURCES AS AN ENERGY ALTERNATIVE
Submission Author:
Fernanda Couto Costa , DF , Brazil
Co-Authors:
Fernanda Couto Costa, Maurício Simões Santanna, EDGAR AMARAL SILVEIRA, Bruno Chaves
Presenter: Fernanda Couto Costa
doi://10.26678/ABCM.COBEM2021.COB2021-0938
Abstract
The increase in municipal solid waste (MSW) production and its improper disposal creates environmental problems. As a way of dealing with landfill overload and still encompassing the growing demand for energy in cities, new technologies, called Waste-to-Energy (WtE) technologies, which are able to convert waste into energy are gaining more space. Therefore, lignocellulosic residues and MSW have become an attractive energy source for their availability, low price and because they are categorized as a sustainable energy that can substitute fossil fuels. The present work is a case study of the city of Brasília that aims to perform the energy analysis of residues taken from the landfill in Brasília, together with lignocellulosic residues from the pruning of the six most common trees in the Federal District. A synthetic MSW was produced based on the main components of Brasilia’s landfill, which are paper, cardboard, plastic and organic residues. All of these components were submitted to a drying and a grinding process. After that, they were mixed in different proportions, based on the gravimetric analysis of the Brasília landfill, to represent the real MSW. The biomass was obtained by a blend of all the six lignocellulosic residues, grounded and mixed. In order to obtain a better fuel, the individual components of biomass species as well as their blend went through the pre-treatment of torrefaction (225, 250 and 275°C) to improve their characteristics such as moisture and fixed carbon content. The obtained solid product was characterized by energy density, calorific value, proximate and ultimate analysis. The final samples consisted of a mixture of different fractions of the municipal solid waste with lignocellulosic residues. The results obtained showed that the torrefied blend sample had an increase of 68.71% in fixed carbon content and 11.10% in HHV, when compared to the raw samples. Regarding the hybrid blend, the one with the highest value of HHV was the torrefied one with the highest proportion of biomass, with an increase of 10.34% in HHV when compared to the raw sample of the same proportion. These results provide a better understanding of this biofuel and new knowledge about whether its use is viable as an energy alternative in the Brasília scenario.
Keywords
Torrefaction, Biomass, pyrolysis, Municipal solid waste, Waste to energy
