Investigation of carbon dioxide (CO2) capture in a falling film contactor by computer simulation
In this work, mathematical models of carbon dioxide (CO2) absorption by monoethanolamine amine (MEA) in a falling film contactor are developed. The proposed models aim to predict conversion of the gas–liquid reaction along the contactor, gas–liquid interface temperature profile (axial and radial), l...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
EDP Sciences
2018-01-01
|
Series: | Oil & Gas Science and Technology |
Online Access: | https://doi.org/10.2516/ogst/2018020 |
id |
doaj-150eb5045925415fadfdf7e88a273dc8 |
---|---|
record_format |
Article |
spelling |
doaj-150eb5045925415fadfdf7e88a273dc82021-02-02T08:33:59ZengEDP SciencesOil & Gas Science and Technology1294-44751953-81892018-01-01734310.2516/ogst/2018020ogst170145Investigation of carbon dioxide (CO2) capture in a falling film contactor by computer simulationGheni Saba A.Abed Mohammed F.Halabia Essam K.Ahmed Saad R.In this work, mathematical models of carbon dioxide (CO2) absorption by monoethanolamine amine (MEA) in a falling film contactor are developed. The proposed models aim to predict conversion of the gas–liquid reaction along the contactor, gas–liquid interface temperature profile (axial and radial), liquid film thickness along the contactor length, axial and radial concentration profiles of reactants in liquid film, and axial and radial profiles of velocity in the liquid film. A code written in MatLab was used to obtain these profiles based on multi grid method through programming of kinetic and thermodynamic equations and physical properties of the absorption system. The mathematical model is validated by an experimental measurement based on absorption of CO2 gas by MEA solution. Four parameters are studied as independent variables namely, mole fraction of carbon dioxide in gaseous mixture, molar concentration of absorbent (MEA, volumetric flow rate of MEA, and its temperature. It is found that the entrance effect of the falling film contactor is related to axial distance from the contactor entrance exponentially: E=B0exp(−B1y) An optimization technique based on minimization of the sum of the squared error between the experimental and predicted composition of absorption process is used to obtain B0 and B1. It is found that reaction between carbon dioxide and MEA is instantaneous, and the axial conversion of carbon dioxide in the gas phase varies exponentially with the contactor length.https://doi.org/10.2516/ogst/2018020 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Gheni Saba A. Abed Mohammed F. Halabia Essam K. Ahmed Saad R. |
spellingShingle |
Gheni Saba A. Abed Mohammed F. Halabia Essam K. Ahmed Saad R. Investigation of carbon dioxide (CO2) capture in a falling film contactor by computer simulation Oil & Gas Science and Technology |
author_facet |
Gheni Saba A. Abed Mohammed F. Halabia Essam K. Ahmed Saad R. |
author_sort |
Gheni Saba A. |
title |
Investigation of carbon dioxide (CO2) capture in a falling film contactor by computer simulation |
title_short |
Investigation of carbon dioxide (CO2) capture in a falling film contactor by computer simulation |
title_full |
Investigation of carbon dioxide (CO2) capture in a falling film contactor by computer simulation |
title_fullStr |
Investigation of carbon dioxide (CO2) capture in a falling film contactor by computer simulation |
title_full_unstemmed |
Investigation of carbon dioxide (CO2) capture in a falling film contactor by computer simulation |
title_sort |
investigation of carbon dioxide (co2) capture in a falling film contactor by computer simulation |
publisher |
EDP Sciences |
series |
Oil & Gas Science and Technology |
issn |
1294-4475 1953-8189 |
publishDate |
2018-01-01 |
description |
In this work, mathematical models of carbon dioxide (CO2) absorption by monoethanolamine amine (MEA) in a falling film contactor are developed. The proposed models aim to predict conversion of the gas–liquid reaction along the contactor, gas–liquid interface temperature profile (axial and radial), liquid film thickness along the contactor length, axial and radial concentration profiles of reactants in liquid film, and axial and radial profiles of velocity in the liquid film. A code written in MatLab was used to obtain these profiles based on multi grid method through programming of kinetic and thermodynamic equations and physical properties of the absorption system. The mathematical model is validated by an experimental measurement based on absorption of CO2 gas by MEA solution. Four parameters are studied as independent variables namely, mole fraction of carbon dioxide in gaseous mixture, molar concentration of absorbent (MEA, volumetric flow rate of MEA, and its temperature. It is found that the entrance effect of the falling film contactor is related to axial distance from the contactor entrance exponentially:
E=B0exp(−B1y)
An optimization technique based on minimization of the sum of the squared error between the experimental and predicted composition of absorption process is used to obtain B0 and B1. It is found that reaction between carbon dioxide and MEA is instantaneous, and the axial conversion of carbon dioxide in the gas phase varies exponentially with the contactor length. |
url |
https://doi.org/10.2516/ogst/2018020 |
work_keys_str_mv |
AT ghenisabaa investigationofcarbondioxideco2captureinafallingfilmcontactorbycomputersimulation AT abedmohammedf investigationofcarbondioxideco2captureinafallingfilmcontactorbycomputersimulation AT halabiaessamk investigationofcarbondioxideco2captureinafallingfilmcontactorbycomputersimulation AT ahmedsaadr investigationofcarbondioxideco2captureinafallingfilmcontactorbycomputersimulation |
_version_ |
1724296883869843456 |