Dynamic Modeling of CO 2 Absorption Process Using Hollow-Fiber Membrane Contactor in MEA Solution

Alexandru-Constantin Bozonc, Ana-Maria Cormos (), Simion Dragan, Cristian Dinca and Calin-Cristian Cormos
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Alexandru-Constantin Bozonc: Faculty of Chemistry and Chemical Engineering, Babeș-Bolyai University, Arany Janos 11, RO-400028 Cluj-Napoca, Romania
Ana-Maria Cormos: Faculty of Chemistry and Chemical Engineering, Babeș-Bolyai University, Arany Janos 11, RO-400028 Cluj-Napoca, Romania
Simion Dragan: Faculty of Chemistry and Chemical Engineering, Babeș-Bolyai University, Arany Janos 11, RO-400028 Cluj-Napoca, Romania
Cristian Dinca: Faculty of Energy Engineering, University Politehnica Bucharest, Splaiul Independentei 313, Sector 6, RO-060042 Bucharest, Romania
Calin-Cristian Cormos: Faculty of Chemistry and Chemical Engineering, Babeș-Bolyai University, Arany Janos 11, RO-400028 Cluj-Napoca, Romania

Energies, 2022, vol. 15, issue 19, 1-21

Abstract: In this work, a comprehensive mathematical model was developed in order to evaluate the CO 2 capture process in a microporous polypropylene hollow-fiber membrane countercurrent contactor, using monoethanolamine (MEA) as the chemical solvent. In terms of CO 2 chemical absorption, the developed model showed excellent agreement with the experimental data published in the literature for a wide range of operating conditions (R 2 > 0.96), 1–2.7 L/min gas flow rates and 10–30 L/h liquid flow rates. Based on developed model, the effects of the gas flow rate, aqueous liquid absorbents’ flow rate and also inlet CO 2 concentration on the removal efficiency of CO 2 were determined. The % removal of CO 2 increased while increasing the MEA solution flow rate; 81% of CO 2 was removed at the high flow rate. The CO 2 removal efficiency decreased while increasing the gas flow rate, and the residence time in the hollow-fiber membrane contactors increased when the gas flow rate was lower, reaching 97% at a gas flow rate of 1 L‧min −1 . However, the effect was more pronounced while operating at high gas flow rates. Additionally, the influence of momentous operational parameters such as the number of fibers and module length on the CO 2 separation efficiency was evaluated. On this basis, the developed model was also used to evaluate CO 2 capture process in hollow-fiber membrane contactors in a flexible operation scenario (with variation in operating conditions) in order to predict the process parameters (liquid and gaseous flows, composition of the streams, mass transfer area, mass transfer coefficient, etc.).

Keywords: dynamic modeling; CO 2 absorption processes; hollow-fiber membrane contactors; flexible operation of carbon capture unit (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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