Determining the Henry's volatility coefficient of nitrosamines in CO2 capture solvents

Jesse G. Thompson, Naser S. Matin, Keemia Abad, Femke Onneweer, Saloni Bhatnagar, Kunlei Liu

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Fundamental properties of nitrosamines, such as their Henry's law constants, are needed to accurately predict the gas-phase partitioning and mitigate emissions of these volatile compounds from operating CO2 capture systems. In this work, the Henry's volatility coefficient of several environmentally relevant nitrosamines were experimentally obtained from water, from a concentrated amine solution and from a CO2 loaded amine solution using a static headspace solid phase microextraction and gas chromatography mass spectrometry method. The dimensionless Henry's volatility coefficients of N-nitrosodimethylamine and N-nitrosodiethylamine were found to be range of 0.001–0.1 at CO2 absorber exit temperatures from 25 to 55 °C. A linear temperature dependency of the Henry's volatility coefficient for these nitrosamines was observed. CO2 loading in the amine solvent increases the Henry's volatility coefficient of the more non-polar nitrosamine while it decreased the Henry's volatility coefficient of the more polar nitrosamine. Similar to parent amines, the polarity of the individual nitrosamines plays a key role in its Henry's volatility coefficients and gas phase partitioning from concentrated amine solutions.

Original languageEnglish
Pages (from-to)104-110
Number of pages7
JournalInternational Journal of Greenhouse Gas Control
Volume73
DOIs
StatePublished - Jun 2018

Bibliographical note

Funding Information:
The authors acknowledge the Carbon Management Research Group (CMRG) members including Duke Energy, Electric Power Research Institute (EPRI), and Louisville Gas & Electric (LG&E) and Kentucky Utilities (KU) for their financial support.

Publisher Copyright:
© 2018 Elsevier Ltd

Keywords

  • Amine scrubbing
  • CO capture
  • Henry's volatility coefficient
  • Nitrosamines
  • Solid phase microextraction

ASJC Scopus subject areas

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

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