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Integration and optimization study on the coal-fired power plant with CO2 capture using MEA

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  • Duan, Liqiang
  • Zhao, Mingde
  • Yang, Yongping

Abstract

Based on the Aspen Plus software, MEA-based CO2 capture system, steam cycle system, CO2 compression system, AHT (Absorption Heat Transformer) and AHP (Absorption Heat Pump) models are established. Effects of the key parameters on the MEA regeneration energy consumption are analyzed. Two different integration ways are proposed. The steam supplied for regeneration of the solvent will be extracted before it is directed to the low-pressure (LP) turbines and the original LP feeding water heater system will be replaced by the new integration subsystem. The main integration processes of CO2 capture unit with the original power plant mainly includes the following four parts: (1) adding a letdown steam turbine and a heater for the parameter match before the steam is supplied for regeneration process; (2) the recovery of heat from the gas that mainly consists of CO2 and H2O at the top part of the stripper; (3) the heat recovery from the CO2 compression process; (4) the recovery of heat with application of AHT and AHP. The performance of a case of 600 MW coal-fired power plant with 85% CO2 capture based on MEA system is studied and the system net efficiency only reduces about 6–8 percent points.

Suggested Citation

  • Duan, Liqiang & Zhao, Mingde & Yang, Yongping, 2012. "Integration and optimization study on the coal-fired power plant with CO2 capture using MEA," Energy, Elsevier, vol. 45(1), pages 107-116.
    • Handle: RePEc:eee:energy:v:45:y:2012:i:1:p:107-116
    DOI: 10.1016/j.energy.2011.12.014
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    References listed on IDEAS

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    1. Yang, Yongping & Guo, Xiyan & Wang, Ningling, 2010. "Power generation from pulverized coal in China," Energy, Elsevier, vol. 35(11), pages 4336-4348.
    2. Zhang, Na & Lior, Noam & Jin, Hongguang, 2011. "The energy situation and its sustainable development strategy in China," Energy, Elsevier, vol. 36(6), pages 3639-3649.
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    More about this item

    Keywords

    Heat integration; Efficiency penalties; MEA; CO2 capture;
    All these keywords.

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