KEPCO Journal on Electric Power and Energy

Korea Electric Power Corporation (한국전력공사)
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Performance Analysis of Upgrading Process with Amine-Based CO2 Capture Pilot Plant

  • Kwak, No-Sang (Creative Research Laboratory, KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Lee, Junghyun (Creative Research Laboratory, KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Lee, Dong Woog (Creative Research Laboratory, KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Lee, Ji Hyun (Creative Research Laboratory, KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Shim, Jae-Goo (Creative Research Laboratory, KEPCO Research Institute, Korea Electric Power Corporation)
  • Received : 2018.01.03
  • Accepted : 2018.06.11
  • Published : 2018.06.30
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Abstract

This study applied upgrades to the processes of a 10 MW wet amine $CO_2$ capture pilot plant and conducted performance evaluation. The 10 MW $CO_2$ Capture Pilot Plant is a facility that applies 1/50 of the combustion flue gas produced from a 500 MW coal-fired power plant, and is capable of capturing up to 200 tons of $CO_2$. This study aimed to quantitatively measure efficiency improvements of post-combustion $CO_2$ capture facilities resulting from process upgrades to propose reliable data for the first time in Korea. The key components of the process upgrades involve absorber intercooling, lean/rich amine exchanger efficiency improvements, reboiler steam TVR (Thermal Vapor Recompression), and lean amine MVR (Mechanical Vapor Recompression). The components were sequentially applied to test the energy reduction effect of each component. In addition, the performance evaluation was conducted with the absorber $CO_2$ removal efficiency maintained at the performance evaluation standard value proposed by the IEA-GHG ($CO_2$ removal rate: 90%). The absorbent used in the study was the highly efficient KoSol-5 that was developed by KEPCO (Korea Electric Power Corporation). From the performance evaluation results, it was found that the steam consumption (regeneration energy) for the regeneration of the absorbent decreased by $0.38GJ/tonCO_2$ after applying the process upgrades: from $2.93GJ/ton\;CO_2$ to $2.55GJ/tonCO_2$. This study confirmed the excellent performance of the post-combustion wet $CO_2$ capture process developed by KEPCO Research Institute (KEPRI) within KEPCO, and the process upgrades validated in this study are expected to substantially reduce $CO_2$ capture costs when applied in demonstration $CO_2$ capture plants.

Keywords

Acknowledgement

Supported by : Korea Institute of Energy Technology Evaluation and Planning (KETEP)

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