Effect of impurities on thermophysical properties and phase behaviour of a CO₂-rich system in CCS

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• 作者：Antonin Chapoy ; Mahmoud Nazeri ; Mahdi Kapateh ; Rod Burgass ; Christophe Coquelet ; Bahman Tohidi
• 关键词：CCS ; Phase behaviour ; Density ; Viscosity ; Hydrate ; Thermodynamic modelling
• 刊名：International Journal of Greenhouse Gas Control
• 出版年：November, 2013
• 年：2013
• 卷：19
• 期：Complete
• 页码：92-100
• 全文大小：1275 K

文摘

CO₂ captured from flue gases may contain impurities such as O₂, Ar, N₂ and water. The presence of such impurities in the CO₂ stream can lead to challenging flow assurance and processing issues. The aim of this communication is to present experimental results on the phase behaviour and thermophysical properties of carbon dioxide in the presence of O₂, Ar, N₂ and water. The effect of these impurities on density and viscosity was experimentally and theoretically investigated over the range of temperature from 243.15 K to 423.15 K up to 150 MPa. A corresponding-state viscosity model was developed to predict the viscosity of the stream and a volume corrected equation of state approach was used to calculate densities. Saturation pressures and hydrate stability (in water saturated and undersaturated conditions) of the CCS stream were also experimentally determined and modelled. This work shows that the thermodynamic models and approaches adopted were able to satisfactorily describe the thermophysical properties and phase behaviour of a typical CO₂-rich stream resulting from flue gases.