Reduction of amine mist emissions from a pilot-scale CO2 capture process using charged colloidal gas aphrons

Xiaobing Li, Jesse G. Thompson, Kunlei Liu

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

In the CO2 capture process from coal-derived flue gas where amine solvents are used, the flue gas can entrain small liquid droplets into the gas stream leading to emission of the amine solvent. The entrained drops, or mist, will lead to high solvent losses and cause decreased CO2 capture performance. In order to reduce the emissions of the fine amine droplets from CO2 absorber, a novel method using charged colloidal gas aphron (CGA) generated by an anionic surfactant was developed. The CGA absorption process for MEA emission reduction was optimized by investigating the surfactant concentration, stirring speed of the CGA generator, and capture temperature. The results show a significant reduction of MEA emissions of over 50% in the flue gas stream exiting the absorber column of a pilot scale CO2 capture unit.

Original languageEnglish
Pages (from-to)75-82
Number of pages8
JournalSeparation Science and Technology
Volume51
Issue number1
DOIs
StatePublished - Jan 2 2016

Keywords

  • amine emissions
  • CO capture
  • Colloidal gas aphron
  • mist elimination

ASJC Scopus subject areas

  • Chemistry (all)
  • Chemical Engineering (all)
  • Process Chemistry and Technology
  • Filtration and Separation

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