Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Absorption Rate Of CO2 In A Bubble Column: A Numerical Modeling Using OpenFOAM
Submission Author:
Marlon Lemos , ES
Co-Authors:
Marlon Lemos, Juan Sergio Romero, Bruno Loureiro
Presenter: Marlon Lemos
doi://10.26678/ABCM.COBEM2021.COB2021-0221
Abstract
Salt fouling of carbonate origin is a major cause of problems related to the flow guarantee in petroleum industry and, in extreme cases, may lead to complete interruption of oil production. Dissolved CO2 (carbon dioxide) in extracted species is the main triggering parameter identified as responsible for carbonate precipitation. With this in mind, this article aims to validate a model to evaluate the CO2(g) (gaseous state) absorption mechanism in a water column through CFD (Computational Fluid Dynamics) simulations in OpenFOAM environment using the multiphaseEulerFoam application, obtaining the numerical results of solubility, concentration and the residence time curve under specified pressure and temperature (p-T) conditions. Both phases are treated as multi-components and as the simulation progresses, the liquid phase becomes more saturated with gas due to mass transfer owing to Fick's Law and Henry's Law. The results related to CO2 solubility in water validates the Henry's Law application (under 5 - 50 bar), reaching an error less than 0.5% regarding theoretical results with constant mass flow rate. The residence-time curve behavior is completely predicted by the mass-transfer model: decrease in solubilization time is expected for higher phases velocity as it reduces contact time and low pressures increase the absorption rate due to small number of molecules collision. The adopted theoretical model explained the numerical results with deviations smaller than 12.0%
Keywords
CFD, Gas Absorption, multiphase flow, Residence Time, solubility
