Modeling of a bubble column for CO2 removal by absorption with NaOH

Johan Michelson; Päivi Mäki-Arvela; Pasi Rajala; Markus Hallapuro; Daniel Schmid; Oskar Karlström; Johan Wärnå; Dmitry Yu Murzin

doi:10.1080/00986445.2023.2261105

Modeling of a bubble column for CO₂ removal by absorption with NaOH

Johan Michelson, Päivi Mäki-Arvela, Pasi Rajala, Markus Hallapuro, Daniel Schmid, Oskar Karlström, Johan Wärnå, Dmitry Yu Murzin^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

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Abstract

CO₂ capture experiments were carried out in a small-scale bubble column reactor using alkaline solutions of sodium hydroxide. The results of the experiments show that a higher NaOH content in the liquid phase and elevated CO₂ concentrations in the gas mixture led to a higher CO₂ removal efficiency. A mathematical model was developed to describe the CO₂ absorption as a function of CO₂ gas inlet and OH^- concentrations at low CO₂ and OH^- concentrations. The CO₂ uptake at high OH^- concentrations (high pH) was accurately predicted by the model, whereas the CO₂ uptake at lower OH^- concentrations could not be predicted with the same accuracy.

Original language	English
Number of pages	11
Journal	Chemical Engineering Communications
DOIs	https://doi.org/10.1080/00986445.2023.2261105
Publication status	E-pub ahead of print - 28 Sept 2023
MoE publication type	A1 Journal article-refereed

Keywords

absorption isotherm
bubble column
CO removal
modelling
NaOH
pH dependence

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10.1080/00986445.2023.2261105

Modeling of a bubble column for CO2 removal by absorption with NaOHFinal published version, 1.75 MBLicence: CC BY

https://urn.fi/URN:NBN:fi-fe202401223603

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abstract = "CO2 capture experiments were carried out in a small-scale bubble column reactor using alkaline solutions of sodium hydroxide. The results of the experiments show that a higher NaOH content in the liquid phase and elevated CO2 concentrations in the gas mixture led to a higher CO2 removal efficiency. A mathematical model was developed to describe the CO2 absorption as a function of CO2 gas inlet and OH- concentrations at low CO2 and OH- concentrations. The CO2 uptake at high OH- concentrations (high pH) was accurately predicted by the model, whereas the CO2 uptake at lower OH- concentrations could not be predicted with the same accuracy.",

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AU - Michelson, Johan

AU - Mäki-Arvela, Päivi

AU - Rajala, Pasi

AU - Hallapuro, Markus

AU - Schmid, Daniel

AU - Karlström, Oskar

AU - Wärnå, Johan

AU - Murzin, Dmitry Yu

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N2 - CO2 capture experiments were carried out in a small-scale bubble column reactor using alkaline solutions of sodium hydroxide. The results of the experiments show that a higher NaOH content in the liquid phase and elevated CO2 concentrations in the gas mixture led to a higher CO2 removal efficiency. A mathematical model was developed to describe the CO2 absorption as a function of CO2 gas inlet and OH- concentrations at low CO2 and OH- concentrations. The CO2 uptake at high OH- concentrations (high pH) was accurately predicted by the model, whereas the CO2 uptake at lower OH- concentrations could not be predicted with the same accuracy.

AB - CO2 capture experiments were carried out in a small-scale bubble column reactor using alkaline solutions of sodium hydroxide. The results of the experiments show that a higher NaOH content in the liquid phase and elevated CO2 concentrations in the gas mixture led to a higher CO2 removal efficiency. A mathematical model was developed to describe the CO2 absorption as a function of CO2 gas inlet and OH- concentrations at low CO2 and OH- concentrations. The CO2 uptake at high OH- concentrations (high pH) was accurately predicted by the model, whereas the CO2 uptake at lower OH- concentrations could not be predicted with the same accuracy.

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KW - bubble column

KW - CO removal

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KW - NaOH

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JO - Chemical Engineering Communications

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Modeling of a bubble column for CO₂ removal by absorption with NaOH

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