Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
MODELING HEAT AND MASS TRANSFER WITH CHEMICAL KINETICS FOR THE PYROLYSIS OF OIL SLUDGE
Submission Author:
Leandro Alcoforado Sphaier , RJ , Brazil
Co-Authors:
York Castillo Santiago, Isabela Florindo Pinheiro, Leandro Alcoforado Sphaier
Presenter: Leandro Alcoforado Sphaier
doi://10.26678/ABCM.COBEM2023.COB2023-1290
Abstract
Several activities in the oil industry, such as drilling, production, refining, transport, processing and distribution, create considerable amounts of hazardous waste, such as oil sludge, which has one of the highest generation rates in refineries. Gasification can be considered a promising technology for the thermochemical conversion of waste from the oil industry since it is a process with minimal environmental impact. It allows the production of syngas, which can have different potential applications, such as the production of liquid fuels, electricity generation, hydrodesulfurization, among others. Thus, this work aims to theoretically evaluate oil sludge gasification seeking to use syngas produced in hydrodesulfurization processes. The theoretical analysis consists of modeling the heat and mass transfer, considering the chemical kinetics involved in the different stages of the gasification process. A one-dimensional model to describe the heat and mass transfer in the zones of the gasification process was elaborated, from mass balances for each component, as well as for the energy balance for the mixture of components. Different chemical reactions, which may be present at various stages, were considered in the model. The resulting system includes 30 non-linear coupled PDEs for describing the transport phenomena in the gasification process. A simplified version of the model, consisting of a steady state operations without axial diffusion was then considered, and computational implementation of the solution was implemented on the Wolfram Mathematica platform. The analysis is focused on the first two-regions of the gasifier, namely drying and pyrolysis. Finally, illustrative results are presented to analyze the effect of different operation and construction parameters on the efficiency of the gasification process.
Keywords
Gaseification, Finite Volumes, mathematical modeling, Biomass gasification
