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Thermodynamic considerations on MEA absorption: Whether thermodynamic cycle could be used as a tool for energy efficiency analysis

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  • Wang, Junyao
  • Sun, Taiwei
  • Zhao, Jun
  • Deng, Shuai
  • Li, Kaixiang
  • Xu, Yaofeng
  • Fu, Jianxin

Abstract

Regeneration heat duty is not the only metric for an absorbent, but it is one of the most decisive factors that define the performance of chemical absorption carbon capture technologies. Nevertheless, from the thermodynamic point of view, there are still insufficient studies on evaluating and analyzing the energy efficiency performance of liquid-phase chemisorption technologies, especially considering the entire process. This study puts forward a systematic method for energy-efficient analysis of liquid-phase chemisorption technologies based on thermodynamic cycle analysis. A 4-Step monoethanolamine (MEA) based liquid-phase chemisorption cycle is established and expressed on the equilibrium isothermals diagram of MEA-CO2-H2O mixture. Then the influences of cyclic parameters on the energy-efficient performance of the entire process or system are evaluated taking the minimum separation work, the absolute energy consumption, and the second law efficiency as performance indicators. Results show that for a typical 4-step cycle at baseline condition which approaches to an ideal operation status, the second law efficiency is in the range of 22.81%–32.99% between 373 K and 393 K.

Suggested Citation

  • Wang, Junyao & Sun, Taiwei & Zhao, Jun & Deng, Shuai & Li, Kaixiang & Xu, Yaofeng & Fu, Jianxin, 2019. "Thermodynamic considerations on MEA absorption: Whether thermodynamic cycle could be used as a tool for energy efficiency analysis," Energy, Elsevier, vol. 168(C), pages 380-392.
    • Handle: RePEc:eee:energy:v:168:y:2019:i:c:p:380-392
    DOI: 10.1016/j.energy.2018.11.084
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    References listed on IDEAS

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    1. Zhao, Ruikai & Deng, Shuai & Liu, Yinan & Zhao, Qing & He, Junnan & Zhao, Li, 2017. "Carbon pump: Fundamental theory and applications," Energy, Elsevier, vol. 119(C), pages 1131-1143.
    2. Parvareh, Forough & Sharma, Manish & Qadir, Abdul & Milani, Dia & Khalilpour, Rajab & Chiesa, Matteo & Abbas, Ali, 2014. "Integration of solar energy in coal-fired power plants retrofitted with carbon capture: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 38(C), pages 1029-1044.
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    1. Zheng, Yawen & Gao, Lin & He, Song, 2023. "Analysis of the mechanism of energy consumption for CO2 capture in a power system," Energy, Elsevier, vol. 262(PA).
    2. Zhao, Jun & Fu, Jianxin & Deng, Shuai & Wang, Junyao & Xu, Yaofeng, 2020. "Decoupled thermal-driven absorption-based CO2 capture into heat engine plus carbon pump: A new understanding with the case study," Energy, Elsevier, vol. 210(C).
    3. Jung, Wonho & Lee, Jinwon, 2022. "Thermodynamic and kinetic modeling of a novel polyamine-based solvent for energy-efficient CO2 capture with energy analysis," Energy, Elsevier, vol. 239(PE).
    4. Liu, W. & Lin, Y.C. & Jiang, L. & Ji, Y. & Yong, J.Y. & Zhang, X.J., 2022. "Thermodynamic exploration of two-stage vacuum-pressure swing adsorption for carbon dioxide capture," Energy, Elsevier, vol. 241(C).
    5. Yaofeng Xu & Shuai Deng & Li Zhao & Xiangzhou Yuan & Jianxin Fu & Shuangjun Li & Yawen Liang & Junyao Wang & Jun Zhao, 2019. "Application of the Thermodynamic Cycle to Assess the Energy Efficiency of Amine-Based Absorption of Carbon Capture," Energies, MDPI, vol. 12(13), pages 1-20, June.

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