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<p>In this work, comprehensive three-dimensional models were developed for an interconnected nondispersive absorber–desorber system using hollow fiber membrane contactors (HFMCs) for CO<sub>2</sub> capture with monoethanolamine solution. The models were implemented in COMSOL Multiphysics, Matlab/Simulink and Aspen Plus. The models were subsequently validated using laboratory-scale experimental data across a wide range of gas and liquid flow rates, as well as carbon dioxide concentrations, achieving R<sup>2</sup> values between 0.922 and 0.987 and root mean square error between 0.1540 and 2.3255. Model predictions provided valuable insights into fluid velocities, concentrations and temperature profiles. Sensitivity studies were performed to determine the optimal CO<sub>2</sub> capture parameters under different operating conditions (e.g., flow rates, compositions, and temperature). Simulation results showed that the desorption could reach an efficiency of about 99% by increasing the temperature to 373.15&#xa0;K. In addition, different geometries of HFMC were studied to enhance the absorption process. The use of shell baffles showed an increase in the absorption efficiency by nearly 5%. Furthermore, the validated models were interconnected using live-link connections with Aspen Plus. The flowsheet simulation results of the entire CO<sub>2</sub> capture process using HFMCs demonstrated a capture efficiency higher than 90% with a CO<sub>2</sub> purity of about 99 vol%.</p> Graphical abstract <p></p>

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Mathematical modeling of interconnected absorber-desorber hollow-fiber membrane contactors for CO2 capture using MEA solution

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月7日

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  • Alexandru-Constantin Bozonc,
  • Vlad-Cristian Sandu,
  • Simion Dragan,
  • Ana-Maria Cormos

摘要

In this work, comprehensive three-dimensional models were developed for an interconnected nondispersive absorber–desorber system using hollow fiber membrane contactors (HFMCs) for CO2 capture with monoethanolamine solution. The models were implemented in COMSOL Multiphysics, Matlab/Simulink and Aspen Plus. The models were subsequently validated using laboratory-scale experimental data across a wide range of gas and liquid flow rates, as well as carbon dioxide concentrations, achieving R2 values between 0.922 and 0.987 and root mean square error between 0.1540 and 2.3255. Model predictions provided valuable insights into fluid velocities, concentrations and temperature profiles. Sensitivity studies were performed to determine the optimal CO2 capture parameters under different operating conditions (e.g., flow rates, compositions, and temperature). Simulation results showed that the desorption could reach an efficiency of about 99% by increasing the temperature to 373.15 K. In addition, different geometries of HFMC were studied to enhance the absorption process. The use of shell baffles showed an increase in the absorption efficiency by nearly 5%. Furthermore, the validated models were interconnected using live-link connections with Aspen Plus. The flowsheet simulation results of the entire CO2 capture process using HFMCs demonstrated a capture efficiency higher than 90% with a CO2 purity of about 99 vol%.

Graphical abstract