Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
HETEROGENEOUS REACTING SYSTEM EVALUATION BY CFD MODEL OF SEMI INDUSTRIAL SCALE GASIFIER IN FLUIDIZED-BED
Submission Author:
Vitor Alberto Lemes Monteiro , MG , Brazil
Co-Authors:
Vitor Alberto Lemes Monteiro, Marcelo Braga dos Santos, Alam Trovó, Solidônio Carvalho
Presenter: Marcelo Braga dos Santos
doi://10.26678/ABCM.COBEM2023.COB2023-0469
Abstract
Gasification in fluidized-bed reactors is a crucial topic that pertains to Waste to Energy systems. However, there are no readily available solutions for efficient and reliable simulations that can be used to design or control such units. The aim of this study is to develop a model that can be used to evaluate some of the heterogeneous reactions that occur during the gasification of biomass in a semi-industrial scale reactor. These reactions are a part of the thermal degradation of biomass and are unique due to the conversion of its phase from solid to gas. The study utilized the Eulerian-Eulerian approach, which involved using OpenFOAM software to create a computational fluid dynamic system to simulate selected reactions. The model involved a bubbling fluidized-bed reactor that contained silica sand as a bed material, and a specific gas injection (CO2, H2O, and H2) was used for the simulation of gasification subprocesses of a generic carbonaceous biomass. The results showed a quantitative and consistent progression of the thermal degradation process in terms of the solid-phase transformations of biomass into gas for each chemical reaction. Additionally, the Reacting Zone was identified and analyzed more effectively. This detailed evaluation of such reactions is essential for the author's research line studies, which includes the development of a large-scale gasifier of municipal refuse-derived fuel in a fluidized bed.
Keywords
Eulerian-Eulerian approach, Large Scale, Gasification, multiphase flow, phase change
