Influence of Particles on Amine Losses During CO2 Capture: A Process Simulation Coupled Aerosol Dynamics Model

David Dhanraj, Pratim Biswas

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Aerosol-driven solvent losses have been identified as one of the major challenges of amine-based post-combustion CO2 capture. In this work, a multi-component aerosol dynamics model based on the discrete-sectional approach, accounting for condensation and coagulation was coupled with a process simulation model developed using ASPEN PLUS v10® to account for the multi-component mass and heat transfer, hydrodynamics, thermodynamics, and electrolytic-solution chemistry. Particle losses inside the absorber were incorporated into the model based on a cut-off size determined from experiments reported in the literature. Based on the results, it was shown that neglecting particle losses inside the absorber resulted in a significant over-prediction of amine-based solvent losses, while coagulation of particles resulted in reduced (∼10%) amine emissions. Furthermore, amine emissions increased when the number concentration and the geometric standard deviation of inlet particles in the flue gas were increased. Moreover, it was shown that amine emissions were lower at lower solvent concentrations and temperatures. CO2 capture efficiency dropped for decreasing solvent concentration, but remained unchanged for lower temperatures, suggesting that decreasing the solvent temperature is an efficient strategy to reduce amine emissions.

Original languageEnglish (US)
Article number103179
JournalInternational Journal of Greenhouse Gas Control
Volume103
DOIs
StatePublished - Dec 2020
Externally publishedYes

Keywords

  • Aerosol dynamics
  • Amine losses
  • Post combustion CO capture
  • Process simulation

ASJC Scopus subject areas

  • Pollution
  • Energy(all)
  • Industrial and Manufacturing Engineering
  • Management, Monitoring, Policy and Law

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