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The contribution of l-Arginine to the mass transfer performance of CO2 absorption by an aqueous solution of methyl diethanolamine in a microreactor

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  • Sarlak, Shokouh
  • Valeh-e-Sheyda, Peyvand

Abstract

The current study investigates the effect of adding l-arginine as a potential promoter for the conventional methyl diethanolamine (MDEA) in the carbon dioxide (CO2) capture process in a T-junction microreactor. The overall gas-phase mass transfer coefficient (KGaV) and CO2 absorption efficiency (ef) were evaluated under distinct operating conditions, including total amine + amino acid concentration of 50 wt%, the liquid flow rate of 3–9 mL min−1, and gas flow rate of 120–300 mL min−1. The composition of different concentrations in the mixture were as MDEA (50%), MDEA + ARG (46 + 4%), MDEA + ARG (42 + 8%),MDEA + ARG (38 + 12%). The impact of amino acid concentration on the physical properties of the aqueous MDEA solution was also compared in four solutions. The results indicated that increasing the arginine concentration from 4 wt% to 12 wt% intensifies the ef values from 78.91 to 92.7%, while the solution density and viscosity grows slightly. Furthermore, the values of the KGaV in the CO2 absorption enhanced from 14.34 kmol/(m3 kPa h) in aqueous MDEA (50%) solution to 63 kmol/(m3 kPa h) in MDEA + ARG (38 + 12%). It confirmed that arginine could apply as a potential chemical activator in the mixture of MDEA-ARG to intensify the absorption of CO2 in the post-combustion CO2 capture processes.

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  • Sarlak, Shokouh & Valeh-e-Sheyda, Peyvand, 2022. "The contribution of l-Arginine to the mass transfer performance of CO2 absorption by an aqueous solution of methyl diethanolamine in a microreactor," Energy, Elsevier, vol. 239(PD).
    • Handle: RePEc:eee:energy:v:239:y:2022:i:pd:s0360544221025986
    DOI: 10.1016/j.energy.2021.122349
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    References listed on IDEAS

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    1. Rashidi, Hamed & Mamivand, Sajad, 2022. "Experimental and numerical mass transfer study of carbon dioxide absorption using Al2O3/water nanofluid in wetted wall column," Energy, Elsevier, vol. 238(PA).
    2. Ganapathy, H. & Shooshtari, A. & Dessiatoun, S. & Alshehhi, M. & Ohadi, M., 2014. "Fluid flow and mass transfer characteristics of enhanced CO2 capture in a minichannel reactor," Applied Energy, Elsevier, vol. 119(C), pages 43-56.
    3. Ganapathy, Harish & Steinmayer, Sascha & Shooshtari, Amir & Dessiatoun, Serguei & Ohadi, Michael M. & Alshehhi, Mohamed, 2016. "Process intensification characteristics of a microreactor absorber for enhanced CO2 capture," Applied Energy, Elsevier, vol. 162(C), pages 416-427.
    4. Rashidi, Hamed & Sahraie, Sasan, 2021. "Enhancing carbon dioxide absorption performance using the hybrid solvent: Diethanolamine-methanol," Energy, Elsevier, vol. 221(C).
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    1. Dehbani, Maryam & Rashidi, Hamed, 2023. "Simultaneous use of microfluidics, ultrasound and alcoholic solvents for improving CO2 desorption process," Energy, Elsevier, vol. 276(C).
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    3. Choubtashani, Shima & Rashidi, Hamed, 2023. "CO2 capture process intensification of water-lean methyl diethanolamine-piperazine solvent: Experiments and response surface modeling," Energy, Elsevier, vol. 267(C).

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