Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
OIL SLUDGE ACTIVATION ENERGY ANALYSIS FOR TERMO-CONVERSION
Submission Author:
Letícia Colletta , MG
Co-Authors:
Letícia Colletta, Osvaldo Jose Venturini, Rubenildo Andrade
Presenter: Letícia Colletta
doi://10.26678/ABCM.COBEM2021.COB2021-1084
Abstract
The thermo-conversion of oil sludge has been presented as a promising alternative for petroleum industrial waste treatment. The composition, characteristics, and energetic analysis of a material are crucial to determine the right conversion process. This study focuses on the thermo-kinetic analysis of oil sludge, bottom sediments in crude oil storage tanks, through the dependence of the activation energy with the conversion degree. The ASTM 1641-04 method, a model-free kinetics, was applied to thermogravimetric (TGA) data to calculate the effective activation energy (Ea) during a pyrolysis process. It also includes the proximate and ultimate analysis of the oil sludge. Three different heat rates were used (5, 10, 20 ºC/min) in a nitrogen atmosphere. The material presents a high viscosity (between 2.74 and 5.19 Pa.s) and high ash content (40,36%). The results obtained from the TGA showed that the pyrolytic breakdown pathway is independent of the heating rate and can be described through a simple first-order kinetic reaction (f (a) = 1-a). The final mean activation energy was 132.97 kJ/mol. The calculated pre-exponential factor using this value equals 8.7.10^15min^-1.
Keywords
Oil sludge, activation energy, termo-conversion
