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Systematic study of an energy efficient MEA-based electrochemical CO2 capture process: From mechanism to practical application

Author

Listed:
  • Wu, Xiaomei
  • Fan, Huifeng
  • Mao, Yuanhao
  • Sharif, Maimoona
  • Yu, Yunsong
  • Zhang, Zaoxiao
  • Liu, Guangxin

Abstract

Electrochemically-mediated amine regeneration (EMAR) is a promising technology for CO2 capture, especially in industries where thermal energy is not available. However, the EMAR technology is still at an early stage for commercial application because of its energy-intensive, operating at impractically low current densities, kinetically slow or amine degradation. To solve these problems, we report an energy efficient MEA-based electrochemical CO2 capture process. The redox of copper is the fundamental step in the EMAR process, which determines the energy consumption, energy efficiency and cycling performance of the whole system. A systematic study of the redox reactions of copper ions and the effect of other mediums have been comprehensively studied in this work. Besides, amine oxidative degradation in EMAR has been firstly discussed from the perspective of the solution electrochemical mechanism. Moreover, the copper cycling performance and energy consumption of the proposed system have been carefully studied, results show that a suitable current density and appropriate disturbance are beneficial to improve the circulation performance of the system. The regeneration energy consumption is 60.76 kJ/mol CO2, with a current density of 0.02 A/cm2 and stirring speed of 200 rpm, which is extremely competitive to be used in CO2 capture compared with traditional CO2 chemical absorption methods.

Suggested Citation

  • Wu, Xiaomei & Fan, Huifeng & Mao, Yuanhao & Sharif, Maimoona & Yu, Yunsong & Zhang, Zaoxiao & Liu, Guangxin, 2022. "Systematic study of an energy efficient MEA-based electrochemical CO2 capture process: From mechanism to practical application," Applied Energy, Elsevier, vol. 327(C).
  • Handle: RePEc:eee:appene:v:327:y:2022:i:c:s0306261922012715
    DOI: 10.1016/j.apenergy.2022.120014
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    References listed on IDEAS

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    1. Wu, Xiao M. & Qin, Zhen & Yu, Yun S. & Zhang, Zao X., 2018. "Experimental and numerical study on CO2 absorption mass transfer enhancement for a diameter-varying spray tower," Applied Energy, Elsevier, vol. 225(C), pages 367-379.
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    5. Cheng, Chin-hung & Li, Kangkang & Yu, Hai & Jiang, Kaiqi & Chen, Jian & Feron, Paul, 2018. "Amine-based post-combustion CO2 capture mediated by metal ions: Advancement of CO2 desorption using copper ions," Applied Energy, Elsevier, vol. 211(C), pages 1030-1038.
    6. Wang, Miao & Rahimi, Mohammad & Kumar, Amit & Hariharan, Subrahmaniam & Choi, Wonyoung & Hatton, T. Alan, 2019. "Flue gas CO2 capture via electrochemically mediated amine regeneration: System design and performance," Applied Energy, Elsevier, vol. 255(C).
    7. Wu, Xiaomei & Fan, Huifeng & Sharif, Maimoona & Yu, Yunsong & Wei, Keming & Zhang, Zaoxiao & Liu, Guangxin, 2021. "Electrochemically-mediated amine regeneration of CO2 capture: From electrochemical mechanism to bench-scale visualization study," Applied Energy, Elsevier, vol. 302(C).
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    Cited by:

    1. Niu, Yingjie & Li, Ting & Bhatti, Ali Hassan & Qu, Jiaqi & Zhou, Xin & Luo, Li & Barzagli, Francesco & Li, Chao'en & Zhang, Rui, 2024. "Development of one-step synthesized SO42−/ZrO2-fly ash (SZ@FA) solid acid catalysts for energy-efficient sorbent regeneration in CO2 capture processes," Applied Energy, Elsevier, vol. 368(C).
    2. Fan, Huifeng & Mao, Yuanhao & Gao, Jifeng & Tong, Shuyue & Yu, Yunsong & Wu, Xiaomei & Zhang, Zaoxiao, 2023. "Combined experimental and computational study for the electrode process of electrochemically mediated amine regeneration (EMAR) CO2 capture," Applied Energy, Elsevier, vol. 350(C).
    3. Mao, Yuanhao & Sultan, Sayd & Fan, Huifeng & Yu, Yunsong & Wu, Xiaomei & Zhang, Zaoxiao, 2024. "Stability improvement of the advanced electrochemical CO2 capture process with high-capacity polyamine solvents," Applied Energy, Elsevier, vol. 369(C).

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