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<p>The blended solvent of monoethanolamine (MEA) and 2-amino-2-methyl-1-propanol (AMP) combines the advantages of fast CO<sub>2</sub> absorption rate of MEA and easy desorption of AMP, making it an ideal alternative to aqueous MEA solvents. However, most current studies on the CO<sub>2</sub> capture performance of MEA/AMP blended solvents are still at the laboratory scale, which cannot provide effective guidance for industrial applications. Based on previous literature, this study established and validated a flue gas CO<sub>2</sub> capture system model for coal-fired power plants using MEA/AMP blended solvent via Aspen Plus software. The effects of key parameters, including lean solvent CO<sub>2</sub> loading, amine concentration of the solvent, MEA/AMP ratio, and stripper pressure, on the system performance were investigated. The optimal operating parameters of the system were obtained, with a reboiler duty of 2.75&#xa0;MJ/kg CO<sub>2</sub> under these conditions. Furthermore, two energy-saving processes (Intercooling Absorption and Rich Solvent Split) were coupled for integrated optimization. The results indicate that the minimum reboiler duty of 2.49&#xa0;MJ/kg CO<sub>2</sub> is achieved when the intercooler is installed at the 11th stage of the absorber and the rich solvent split ratio is 0.25. Meanwhile, the exergy efficiency is improved from 26.51% to 29.45%.</p>

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Simulation and Integration Optimization of Energy-Saving Processes for Flue Gas CO2 Capture System in Coal-Fired Power Plants Based on MEA/AMP Blended Solvent

  • 期刊论文

  • 发表日期：

    2026年4月1日

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  • Bohan Gu,
  • Zhaoping Zhong,
  • Qi Xiong,
  • Wei Wang

摘要

The blended solvent of monoethanolamine (MEA) and 2-amino-2-methyl-1-propanol (AMP) combines the advantages of fast CO2 absorption rate of MEA and easy desorption of AMP, making it an ideal alternative to aqueous MEA solvents. However, most current studies on the CO2 capture performance of MEA/AMP blended solvents are still at the laboratory scale, which cannot provide effective guidance for industrial applications. Based on previous literature, this study established and validated a flue gas CO2 capture system model for coal-fired power plants using MEA/AMP blended solvent via Aspen Plus software. The effects of key parameters, including lean solvent CO2 loading, amine concentration of the solvent, MEA/AMP ratio, and stripper pressure, on the system performance were investigated. The optimal operating parameters of the system were obtained, with a reboiler duty of 2.75 MJ/kg CO2 under these conditions. Furthermore, two energy-saving processes (Intercooling Absorption and Rich Solvent Split) were coupled for integrated optimization. The results indicate that the minimum reboiler duty of 2.49 MJ/kg CO2 is achieved when the intercooler is installed at the 11th stage of the absorber and the rich solvent split ratio is 0.25. Meanwhile, the exergy efficiency is improved from 26.51% to 29.45%.