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Effect of K2CO3·1.5H2O on the regeneration energy consumption of potassium-based sorbents for CO2 capture

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  • Zhao, Wenying
  • Sprachmann, Gerald
  • Li, Zhenshan
  • Cai, Ningsheng
  • Zhang, Xiaohui

Abstract

A high-pressure fixed bed reactor was used to study the formation condition of K2CO3·1.5H2O and the significance of K2CO3·1.5H2O in reducing the regeneration energy required for potassium-based sorbents. The reaction heat of K2CO3 converted into KHCO3 in the following reaction: K2CO3(s)+CO2(g)+H2O(g)↔2KHCO3(s), is approximately 143kJmol−1-CO2. This value is much larger than that of amine with CO2 (∼60kJmol−1-CO2). K2CO3·1.5H2O can absorb CO2 with the reaction heat of 42kJmol−1-CO2 in the following reaction: K2CO3·1.5H2O(s)+CO2(g)↔2KHCO3(s)+0.5H2O(g). This result indicates that a large amount of heat (99kJmol−1-CO2) is released during the formation of K2CO3·1.5H2O in the following reaction: K2CO3(s)+1.5H2O (g)↔K2CO3·1.5H2O(s). The energy required for potassium-based sorbents can be potentially reduced when KHCO3 is converted into K2CO3·1.5H2O in the regeneration process or when the heat released during the formation of K2CO3·1.5H2O can be reused. Consequently, this work is focused on the investigation of the formation condition of K2CO3·1.5H2O and the potential effect of K2CO3·1.5H2O on the reduction of the energy required for potassium-based sorbents.

Suggested Citation

  • Zhao, Wenying & Sprachmann, Gerald & Li, Zhenshan & Cai, Ningsheng & Zhang, Xiaohui, 2013. "Effect of K2CO3·1.5H2O on the regeneration energy consumption of potassium-based sorbents for CO2 capture," Applied Energy, Elsevier, vol. 112(C), pages 381-387.
    • Handle: RePEc:eee:appene:v:112:y:2013:i:c:p:381-387
    DOI: 10.1016/j.apenergy.2013.06.018
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    Citations

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    Cited by:

    1. Foster Kofi Ayittey & Agus Saptoro & Perumal Kumar & Mee Kee Wong, 2020. "Parametric study and optimisation of hot K2CO3‐based post‐combustion CO2 capture from a coal‐fired power plant," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 10(3), pages 631-642, June.
    2. Wang, Meihong & Joel, Atuman S. & Ramshaw, Colin & Eimer, Dag & Musa, Nuhu M., 2015. "Process intensification for post-combustion CO2 capture with chemical absorption: A critical review," Applied Energy, Elsevier, vol. 158(C), pages 275-291.
    3. Qin, Changlei & Yin, Junjun & Ran, Jingyu & Zhang, Li & Feng, Bo, 2014. "Effect of support material on the performance of K2CO3-based pellets for cyclic CO2 capture," Applied Energy, Elsevier, vol. 136(C), pages 280-288.
    4. Xie, Yujiao & Zhang, Yingying & Lu, Xiaohua & Ji, Xiaoyan, 2014. "Energy consumption analysis for CO2 separation using imidazolium-based ionic liquids," Applied Energy, Elsevier, vol. 136(C), pages 325-335.
    5. Guo, Yafei & Zhao, Chuanwen & Li, Changhai & Lu, Shouxiang, 2014. "Application of PEI–K2CO3/AC for capturing CO2 from flue gas after combustion," Applied Energy, Elsevier, vol. 129(C), pages 17-24.
    6. Jayakumar, Abhimanyu & Gomez, Arturo & Mahinpey, Nader, 2016. "Post-combustion CO2 capture using solid K2CO3: Discovering the carbonation reaction mechanism," Applied Energy, Elsevier, vol. 179(C), pages 531-543.
    7. Sanna, Aimaro & Ramli, Ili & Mercedes Maroto-Valer, M., 2015. "Development of sodium/lithium/fly ash sorbents for high temperature post-combustion CO2 capture," Applied Energy, Elsevier, vol. 156(C), pages 197-206.
    8. Chate, Akshay & Sharma, Rakesh & S, Srinivasa Murthy & Dutta, Pradip, 2022. "Studies on a potassium carbonate salt hydrate based thermochemical energy storage system," Energy, Elsevier, vol. 258(C).
    9. Thummakul, Theeranan & Gidaspow, Dimitri & Piumsomboon, Pornpote & Chalermsinsuwan, Benjapon, 2017. "CFD simulation of CO2 sorption on K2CO3 solid sorbent in novel high flux circulating-turbulent fluidized bed riser: Parametric statistical experimental design study," Applied Energy, Elsevier, vol. 190(C), pages 122-134.
    10. Susmita Datta Peu & Arnob Das & Md. Sanowar Hossain & Md. Abdul Mannan Akanda & Md. Muzaffer Hosen Akanda & Mahbubur Rahman & Md. Naim Miah & Barun K. Das & Abu Reza Md. Towfiqul Islam & Mostafa M. Sa, 2023. "A Comprehensive Review on Recent Advancements in Absorption-Based Post Combustion Carbon Capture Technologies to Obtain a Sustainable Energy Sector with Clean Environment," Sustainability, MDPI, vol. 15(7), pages 1-33, March.

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