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Sensitivity analysis and multi-objective optimization of CO2CPU process using response surface methodology

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  • Koohestanian, Esmaeil
  • Samimi, Abdolreza
  • Mohebbi-Kalhori, Davod
  • Sadeghi, Jafar

Abstract

Compression and purification unit (CPU) is a common industrial process for capturing CO2 from oxy-fuel combustion where high energy requirement is one of its disadvantages. This study focuses on analyzing of the sensitivity and optimizing multi-objectively the operating conditions of CPU, using response surface methodology (RSM). The main objective was to increase the efficiency of CO2 removal from the oxy-fuel combustion power plant. Statistical analysis reveals that reducing the first separator temperature, not only, plays a major role in CO2 separation, but also, it decreases the total work and heat duty of the process. It was found that the optimal multi-stage CO2 compressor discharge pressure was 25.34 bar while regular pressure for this process was reported as 30 bar. Furthermore, the optimal flue gas temperature before, between and after compression, and the first and second flash separator temperatures were 20 °C, 20 °C, 20.6 °C, −38.2 °C, and −55 °C, respectively. with the previous works carried out in a constant amount of CO2 separation, the proposed process leads to lower pressure, and therefore lower operating and capital costs.

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  • Koohestanian, Esmaeil & Samimi, Abdolreza & Mohebbi-Kalhori, Davod & Sadeghi, Jafar, 2017. "Sensitivity analysis and multi-objective optimization of CO2CPU process using response surface methodology," Energy, Elsevier, vol. 122(C), pages 570-578.
    • Handle: RePEc:eee:energy:v:122:y:2017:i:c:p:570-578
    DOI: 10.1016/j.energy.2017.01.129
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    References listed on IDEAS

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    1. Jin, Bo & Zhao, Haibo & Zheng, Chuguang, 2015. "Optimization and control for CO2 compression and purification unit in oxy-combustion power plants," Energy, Elsevier, vol. 83(C), pages 416-430.
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    1. Koohestanian, Esmaeil & Sadeghi, Jafar & Mohebbi-Kalhori, Davod & Shahraki, Farhad & Samimi, Abdolreza, 2018. "A novel process for CO2 capture from the flue gases to produce urea and ammonia," Energy, Elsevier, vol. 144(C), pages 279-285.
    2. Allahyarzadeh-Bidgoli, Ali & Yanagihara, Jurandir Itizo, 2023. "Energy efficiency, sustainability, and operating cost optimization of an FPSO with CCUS: An innovation in CO2 compression and injection systems," Energy, Elsevier, vol. 267(C).
    3. Zhang, Han & Gao, Xueping & Sun, Bowen & Qin, Zixue & Zhu, Hongtao, 2020. "Parameter analysis and performance optimization for the vertical pipe intake-outlet of a pumped hydro energy storage station," Renewable Energy, Elsevier, vol. 162(C), pages 1499-1518.

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