An experimental and modeling study on incipient hydrate-forming conditions for ternary guests of carbon dioxide, nitrogen and sulfur dioxide

Won Gu Rho, Sun Hyung Kim, Dong Woo Cho, Jeong Won Kang, Chul Soo Lee

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

In carbon dioxide capture and sequestration (CCS) processes, captured CO2 may encounter conditions of hydrate formation due to the presence of water. For stable, long-term operation of CCS processes, hydrate-phase equilibrium data are essential. Captured CO2 from combustion of fossil fuel may include other impurities such as N2 and SO2. Phase equilibria including a single impurity (N2 or SO2) have been reported by other researchers, but no experimental observations have been obtained for ternary guest systems. In this work, the incipient hydrate-forming temperatures for a binary guest of CO2 and N2 and a ternary guest of CO2, N2 and SO2 were experimentally measured at 2.0–3.5 MPa. An effect of the ratio between guest components and water was observed. The experimental results were compared with calculations using an equation of state based on a hydrogen-bonding nonrandom lattice fluid (NLF-HB) combined with the van der Waals-Platteeuw model. The model predictions were in good agreement with experimental data with an overall average deviation of 2.6%.

Original languageEnglish
Pages (from-to)127-131
Number of pages5
JournalFluid Phase Equilibria
Volume473
DOIs
Publication statusPublished - 2018 Oct 15

Keywords

  • Carbon dioxide
  • Hydrates
  • Lattice fluid equation of state
  • Nitrogen
  • Sulfur dioxide

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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