Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
THERMOCHEMICAL EQUILIBRIUM MODELING FOR AIR GASIFICATION OF WASTE TIRES
Submission Author:
Rebecca Pinto da Silva Godoy , MG
Co-Authors:
Rebecca Pinto da Silva Godoy, Christian Jeremi R. Coronado, Ivonete Ávila
Presenter: Rebecca Pinto da Silva Godoy
doi://10.26678/ABCM.ENCIT2018.CIT18-0356
Abstract
The disposal of waste tires is currently a challenge once its biological and chemical resistance to degradation results in a negative impact on the environment. In order to solve the environmental problems and to produce energy, waste tire can be thermochemically disposed. Gasification is one of the methods to obtain a syngas with a high calorific value and a potential resource for electrical energy production. Mathematical models can be helpful for the design of gasifiers and prediction of operational behavior. In this study, four thermochemical equilibrium models, reported in the literature, based on equilibrium constant, for predicting the composition of syngas in a downdraft gasifier were developed for waste tire, as feedstock. A comparative analysis of each model and its output is carried out. The effects of equivalence ratio (ER) and gasification temperature on the composition of the syngas are investigated. The equivalence ratio is varied in the range of 0.35–0.45. A increase in the temperature of the process resulted in higher values for nitrogen and carbon dioxide, however, lower values for carbon monoxide and hydrogen were observed. Regarding the calorific value, lower ER values and lower temperatures resulted in higher LHV values. As expected, lower ER values result in lower CO2 and higher CH4 concentrations.
Keywords
waste tires, Gasification, equilibrium modeling, downdraft gasifier
