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Exergy analysis: A CO2 removal plant using a-MDEA as the solvent

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  • Feyzi, Vafa
  • Beheshti, Masoud
  • Gharibi Kharaji, Abolfazl

Abstract

An exergy analysis was conducted for CO2 removal process from syngas using methyldiethanolamine activated by piperazine (a-MDEA). The process was simulated with Aspen HYSYS and the validation of the results was performed using the field data of Fanavaran Petrochemical Company. The process was divided into five separate sections. In order to determine the exergy loss, exergy balance equation was established around each section. The results showed that the highest exergy loss amongst five sections returns to the flasher (contributes 31.5% of total exergy loss); followed by the absorber column, stripper column, heat recovery section and the pump. In order to decrease the exergy loss in the process, piperazine concentration in a-MDEA solvent was increased which led to reduction in amine solvent flow rate. According to the results, the total exergy loss is decreased from 3.25 MW to 2.63 MW. When the amine flow rate decreased by 27%, the exergy loss, total energy consumption and the total utilities cost decreased by 19%, 18% and 25%, respectively.

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  • Feyzi, Vafa & Beheshti, Masoud & Gharibi Kharaji, Abolfazl, 2017. "Exergy analysis: A CO2 removal plant using a-MDEA as the solvent," Energy, Elsevier, vol. 118(C), pages 77-84.
    • Handle: RePEc:eee:energy:v:118:y:2017:i:c:p:77-84
    DOI: 10.1016/j.energy.2016.12.020
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    Keywords

    Energy; Exergy; CO2 removal; a-MDEA; Utilities cost;
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