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Pilot-scale CO2 capture demonstration of stripper interheating using 30 wt% MEA at a Waste-to-Energy facility

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  • Vinjarapu, Sai Hema Bhavya
  • Neerup, Randi
  • Larsen, Anders Hellerup
  • Villadsen, Sebastian Nis Bay
  • Jensen, Søren
  • Karlsson, Jakob Lindkvist
  • Kappel, Jannik
  • Lassen, Henrik
  • Blinksbjerg, Peter
  • von Solms, Nicolas
  • Fosbøl, Philip Loldrup

Abstract

Post-combustion ▪ capture is a widely recognised technology for controlling industrial ▪ emissions. However, issues like the substantial energy demands for solvent regeneration still need to be solved. The current work aims to discuss the outcomes of process optimisation within a pilot-scale ▪ capture facility by implementing interheating in the stripper to reduce energy consumption. The pilot-scale experiments were executed at Amager Bakke, a Waste-to-Energy plant in Copenhagen, Denmark. These tests used 30wt% Monoethanolamine as the solvent. A semi-lean solvent from the middle of the stripper is withdrawn for external heating by an interheater and fed to the stripper at the same height. A steam generator with adjustable electrical duty is used as the heat source for the interheater. The novelty of this work lies in the pilot scale demonstration of stripper interheating at an industrial facility, which has seldom been done. The objective is to experimentally demonstrate the performance of the Interheating configuration at the pilot scale and analyse the potential improvements in the energy consumption of the process. The interheating experiments were conducted by varying the reboiler duty in the range of 12 to 20kW and the interheater duty in the range of 2 to 5kW while maintaining a solvent flow of 267kg/h and a flue gas flow of 99kg/h. The results provide several possible scenarios, are discussed in detail, and are compared to previously obtained base case results. While maintaining a capture efficiency of around 83%, stripper interheating has demonstrated a specific reboiler duty of 2.71GJ/tonne ▪ compared to 3.71GJ/tonne ▪ achieved by the base case operation. A 3% reduction in the specific reboiler duty was achieved by interheating at a capture efficiency slightly over 90%. A preliminary model based on the experimental results has shown a further reduction of SRD to 2.25GJ/tonne ▪ at high capture efficiencies.

Suggested Citation

  • Vinjarapu, Sai Hema Bhavya & Neerup, Randi & Larsen, Anders Hellerup & Villadsen, Sebastian Nis Bay & Jensen, Søren & Karlsson, Jakob Lindkvist & Kappel, Jannik & Lassen, Henrik & Blinksbjerg, Peter &, 2025. "Pilot-scale CO2 capture demonstration of stripper interheating using 30 wt% MEA at a Waste-to-Energy facility," Energy, Elsevier, vol. 320(C).
    • Handle: RePEc:eee:energy:v:320:y:2025:i:c:s0360544225006152
    DOI: 10.1016/j.energy.2025.134973
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    References listed on IDEAS

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    1. Leites, I.L. & Sama, D.A. & Lior, N., 2003. "The theory and practice of energy saving in the chemical industry: some methods for reducing thermodynamic irreversibility in chemical technology processes," Energy, Elsevier, vol. 28(1), pages 55-97.
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