Enhancements in mass transfer for carbon capture solvents part II: Micron-sized solid particles

David S. Mannel, Guojie Qi, Leland R. Widger, Jonathan Bryant, Kun Liu, Aaron Fegenbush, Cameron A. Lippert, Kunlei Liu

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


The mass transfer of CO2 into amine-based carbon capture solvents was improved with the addition of heterogeneous micron- and nano-sized particle additives. Enhancement in CO2 removal rate was determined in a stirred reactor with a flat steady gas-liquid interface and in a small packed-bed absorption column. The screening of several particle types in the stirred reactor indicated that carbon particles are best suited to enhance the rate of CO2 diffusion in 30 wt.% monoethanolamine (MEA), and tests in the small packed-bed absorption column showed improved CO2 mass transfer in three solvents, MEA, piperazine (PZ), and hexanediamine (HDA), upon addition of nano-sized activated carbon particles. The enhancement of CO2 capture efficiency and KG increases with increasing solvent kinetics, in order of methyldiethanolamine (MDEA) < MEA < PZ < HDA, confirming the particle additives have a larger impact on kinetically faster, liquid-side diffusion limited, solvents. The combined benefits of the particle additives were then demonstrated on an absorption-desorption integrated bench-scale CO2 capture unit, in both MEA and the thermally stable advanced amine blend: 1-amino-2-propanol (A2P)/2-amino-2-methyl-1-propanol (AMP). The combined system translated to an overall 26% reduction in energy penalty for CO2 capture on the CAER Bench-scale unit.

Original languageEnglish
Pages (from-to)138-145
Number of pages8
JournalInternational Journal of Greenhouse Gas Control
StatePublished - 2017

Bibliographical note

Publisher Copyright:
© 2017 Elsevier Ltd


  • Additives
  • Amine
  • CO capture
  • Mass transfer
  • Particle
  • Post-combustion

ASJC Scopus subject areas

  • Pollution
  • General Energy
  • Management, Monitoring, Policy and Law
  • Industrial and Manufacturing Engineering


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