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A multiobjective experimental based optimization to the CO2 capture process using hybrid solvents of MEA-MeOH and MEA-water

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  • Rashidi, Hamed
  • Valeh-e-Sheyda, Peyvand
  • Sahraie, Sasan

Abstract

To achieve the reduction of total energy consumption of CO2 capture without the major drawbacks of conventional amine solvents, the superior performance of a blended physical-chemical solvent, MEA-MeOH, was experimentally compared with that of MEA aqueous absorbent in lab-scale absorption/desorption towers, equipped with stainless steel pall ring packings. Considering the typical industrial requirements, the main operating variables accounted for each solvent were the operating temperature (35–55 °C), amine concentration (15–30 wt%), gas flow rate (50–100 l/min), liquid flow rate (0.75–1.25 l/min), CO2 concentration in the inlet gas (5–15 mol %), and the reboiler heat duty (1.4–2.2 kW). Response surface methodology was applied to give a quadratic mathematical model for obtained empirical volumetric overall mass transfer coefficients (KGaV). Based on the drastic increase of the energy requirement for solvent regeneration, a multiobjective optimization framework has been made to achieve the maximum desirable values for the KGaV, and the absorption percentage (Φ) with the minimum energy consumption (Ω). It was suggested that under the optimum operating condition, adding methanol to an aqueous MEA solution, reduces the regeneration energy consumption by 12%, while augmenting the CO2 absorption percentage (Φ) by 9.1%.

Suggested Citation

  • Rashidi, Hamed & Valeh-e-Sheyda, Peyvand & Sahraie, Sasan, 2020. "A multiobjective experimental based optimization to the CO2 capture process using hybrid solvents of MEA-MeOH and MEA-water," Energy, Elsevier, vol. 190(C).
    • Handle: RePEc:eee:energy:v:190:y:2020:i:c:s0360544219321255
    DOI: 10.1016/j.energy.2019.116430
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    References listed on IDEAS

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    1. Zhang, Minkai & Guo, Yincheng, 2013. "Rate based modeling of absorption and regeneration for CO2 capture by aqueous ammonia solution," Applied Energy, Elsevier, vol. 111(C), pages 142-152.
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    Cited by:

    1. Yoro, Kelvin O. & Daramola, Michael O. & Sekoai, Patrick T. & Armah, Edward K. & Wilson, Uwemedimo N., 2021. "Advances and emerging techniques for energy recovery during absorptive CO2 capture: A review of process and non-process integration-based strategies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 147(C).
    2. Dehbani, Maryam & Rashidi, Hamed, 2023. "Simultaneous use of microfluidics, ultrasound and alcoholic solvents for improving CO2 desorption process," Energy, Elsevier, vol. 276(C).
    3. Aghel, Babak & Sahraie, Sasan & Heidaryan, Ehsan, 2020. "Comparison of aqueous and non-aqueous alkanolamines solutions for carbon dioxide desorption in a microreactor," Energy, Elsevier, vol. 201(C).
    4. Rashidi, Hamed & Rasouli, Parvaneh & Azimi, Hossein, 2022. "A green vapor suppressing agent for aqueous ammonia carbon dioxide capture solvent: Microcontactor mass transfer study," Energy, Elsevier, vol. 244(PA).
    5. 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).
    6. Rashidi, Hamed & Sahraie, Sasan, 2021. "Enhancing carbon dioxide absorption performance using the hybrid solvent: Diethanolamine-methanol," Energy, Elsevier, vol. 221(C).
    7. Fu, Kun & Zheng, Mingzhen & Wang, Haijie & Fu, Dong, 2022. "Effect of water content on the characteristics of CO2 capture processes in absorbents of 2-ethylhexan-1-amine + diglyme," Energy, Elsevier, vol. 244(PA).

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    Keywords

    Absorption; Box-behnken; Carbon dioxide; Hybrid; MEA-MeOH; MEA-H2O;
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