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Process modifications for a hot potassium carbonate‐based CO2 capture system: a comparative study

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  • Foster Kofi Ayittey
  • Christine Ann Obek
  • Agus Saptoro
  • Kumar Perumal
  • Mee Kee Wong

Abstract

Chemical absorption using hot potassium carbonate (K2CO3) is believed to be a more energy‐efficient post‐combustion CO2 capture technology as compared to conventional amine‐based absorption processes. That notwithstanding, literature information on how process modifications could render this technology more appealing are limited. In this study, seven different modified process configurations have been investigated to observe their impacts on the system performances of a typical hot K2CO3‐based capture system. The results demonstrate that flue gas precooling is capable of improving the carbon removal level in the K2CO3‐based capture system by 11.46% over the base case value. This was achieved by precooling the flue gas stream from 110 to 70°C before feeding into the absorber column. Other modified process systems such as the rich solvent pre‐heating and lean vapour compression were equally observed to decrease the specific stripper reboiler duty by 24.28% and 21.38%, respectively. The findings from this research prove that process modifications are capable of enhancing the system performances of the hot K2CO3‐based post‐combustion CO2 capture technology. © 2020 Society of Chemical Industry and John Wiley & Sons, Ltd.

Suggested Citation

  • Foster Kofi Ayittey & Christine Ann Obek & Agus Saptoro & Kumar Perumal & Mee Kee Wong, 2020. "Process modifications for a hot potassium carbonate‐based CO2 capture system: a comparative study," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 10(1), pages 130-146, February.
    • Handle: RePEc:wly:greenh:v:10:y:2020:i:1:p:130-146
    DOI: 10.1002/ghg.1953
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    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. Shunji Kang & Zhi Shen & Xizhou Shen & Liuya Fang & Li Xiang & Wenze Yang, 2021. "Experimental investigation on CO2 desorption kinetics from MDEA + PZ and comparison with MDEA/MDEA + DEA aqueous solutions with thermo‐gravimetric analysis method," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 11(5), pages 974-987, October.
    3. Chuenphan, Thapanat & Yurata, Tarabordin & Sema, Teerawat & Chalermsinsuwan, Benjapon, 2022. "Techno-economic sensitivity analysis for optimization of carbon dioxide capture process by potassium carbonate solution," Energy, Elsevier, vol. 254(PA).
    4. Kumar, Tharun Roshan & Beiron, Johanna & Biermann, Maximilian & Harvey, Simon & Thunman, Henrik, 2023. "Plant and system-level performance of combined heat and power plants equipped with different carbon capture technologies," Applied Energy, Elsevier, vol. 338(C).
    5. Zhang, Zhien & Borhani, Tohid N. & Olabi, Abdul G., 2020. "Status and perspective of CO2 absorption process," Energy, Elsevier, vol. 205(C).

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