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Superior energy-saving splitter in monoethanolamine-based biphasic solvents for CO2 capture from coal-fired flue gas

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  • Wang, Rujie
  • Liu, Shanshan
  • Wang, Lidong
  • Li, Qiangwei
  • Zhang, Shihan
  • Chen, Bo
  • Jiang, Lei
  • Zhang, Yifeng

Abstract

A monoethanolamine/1-propanol aqueous biphasic absorbent with rapid absorption rate and low regeneration energy was proposed to enhance the CO2 capture technology. 1-propanol was used as a physical solvent and phase splitter, which increased the mass transfer coefficient from 1.83 to 2.36 × 10−10 mol cm−2 s−1 Pa−1 and triggered the liquid–liquid phase separation due to the salting-out effect. CO2 capture process was modeled using an Aspen plus simulator by incorporating a decanter according to experimental results of phase separation. Energy consumption was analyzed considering the solvent circulation rate, lean loading, operating pressure, and biphasic solvent concentration. Because only the CO2-rich phase was required to be regenerated, a decreased stripping volume and high mCO2/mH2O were achieved. Sensible and vaporization heats substantially decreased by 80% and 75%, respectively, and the total regeneration energy decreased by 39.85%. Moreover, the cyclic capacity was increased from 1.01 to 2.51 mol/kg, which substantially reduced the equipment footprint. This study provides new insights into biphasic solvents with considerable energy saving for CO2 capture.

Suggested Citation

  • Wang, Rujie & Liu, Shanshan & Wang, Lidong & Li, Qiangwei & Zhang, Shihan & Chen, Bo & Jiang, Lei & Zhang, Yifeng, 2019. "Superior energy-saving splitter in monoethanolamine-based biphasic solvents for CO2 capture from coal-fired flue gas," Applied Energy, Elsevier, vol. 242(C), pages 302-310.
    • Handle: RePEc:eee:appene:v:242:y:2019:i:c:p:302-310
    DOI: 10.1016/j.apenergy.2019.03.138
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    Cited by:

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    9. Gao, Hongxia & Huang, Yufei & Zhang, Xiaowen & Bairq, Zain Ali Saleh & Huang, Yangqiang & Tontiwachwuthikul, Paitoon & Liang, Zhiwu, 2020. "Catalytic performance and mechanism of SO42−/ZrO2/SBA-15 catalyst for CO2 desorption in CO2-loaded monoethanolamine solution," Applied Energy, Elsevier, vol. 259(C).
    10. Hwang, Junhyeok & Kim, Jeongnam & Lee, Hee Won & Na, Jonggeol & Ahn, Byoung Sung & Lee, Sang Deuk & Kim, Hoon Sik & Lee, Hyunjoo & Lee, Ung, 2019. "An experimental based optimization of a novel water lean amine solvent for post combustion CO2 capture process," Applied Energy, Elsevier, vol. 248(C), pages 174-184.
    11. Kim, Jeongnam & Na, Jonggeol & Kim, Kyeongsu & Bak, Ji Hyun & Lee, Hyunjoo & Lee, Ung, 2021. "Learning the properties of a water-lean amine solvent from carbon capture pilot experiments," Applied Energy, Elsevier, vol. 283(C).
    12. Wang, Rujie & Zhao, Huajun & Qi, Cairao & Yang, Xiaotong & Zhang, Shihan & Li, Ming & Wang, Lidong, 2022. "Novel tertiary amine-based biphasic solvent for energy-efficient CO2 capture with low corrosivity," Energy, Elsevier, vol. 260(C).
    13. Zhou, Xiaobin & Liu, Chao & Zhang, Jie & Fan, Yinming & Zhu, Yinian & Zhang, Lihao & Tang, Shen & Mo, Shengpeng & Zhu, Hongxiang & Zhu, Zongqiang, 2023. "Novel 2-amino-2-methyl-1-propanol-based biphasic solvent for energy-efficient carbon dioxide capture using tetraethylenepentamine as a phase change regulator," Energy, Elsevier, vol. 270(C).
    14. 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).
    15. Hou, Lianhua & Yu, Zhichao & Luo, Xia & Wu, Songtao, 2022. "Self-sealing of caprocks during CO2 geological sequestration," Energy, Elsevier, vol. 252(C).
    16. Wang, Rujie & Jiang, Lei & Li, Qiangwei & Gao, Ge & Zhang, Shihan & Wang, Lidong, 2020. "Energy-saving CO2 capture using sulfolane-regulated biphasic solvent," Energy, Elsevier, vol. 211(C).
    17. Laura A. Pellegrini & Matteo Gilardi & Fabio Giudici & Elvira Spatolisano, 2021. "New Solvents for CO 2 and H 2 S Removal from Gaseous Streams," Energies, MDPI, vol. 14(20), pages 1-40, October.

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