Solid phase I of carbon dioxide: a new Gibbs free energy equation of state and its application for the calculation of the solubility of CO2 in different solvents - Mines Paris Accéder directement au contenu
Communication Dans Un Congrès Année : 2023

Solid phase I of carbon dioxide: a new Gibbs free energy equation of state and its application for the calculation of the solubility of CO2 in different solvents

Wen-Hwa Siah
  • Fonction : Auteur
  • PersonId : 1327398
Marco Campestrini
Paolo Stringari

Résumé

Carbon dioxide (CO2) freeze-out is a very common issue encountered in liquefaction of gases (like air components, methane, hydrogen) because of its high triple-point temperature. This phenomenon is rather problematic in liquefaction facilities as it can cause fouling in heat exchanger tubes that leads to unscheduled plant shutdowns. Nevertheless, CO2 freeze-out can also be a useful separation technique, making it possible to remove CO2 from industrial plant emissions [1] or purification units like in biogas upgrading [2] through the cryogenic carbon capture process. Consequently, an accurate prediction of low-temperature phase equilibria involving solid CO2 is necessary. In this work, a new Gibbs free energy Equation of State (EoS) with temperature and pressure as the independent variables was developed to describe the solid phase I of carbon dioxide (“dry ice”), continuing the work carried out by Stringari et al. on the modeling of solid methane [3] and solid benzene [4]. The model for the solid phase has been coupled with the reference equation of state for the fluid phases developed by Span and Wagner [5] in order to reproduce analytically the equality of Gibbs free energy, the experimental volume change, and the experimental enthalpy change at the triple point. The EoS for the solid phase has a validity range from 2 to 800 K in temperature and up to 12 GPa in pressure. The new EoS, alongside two different EoSs developed for phase I of solid CO2 [6,7] and the Classical Approach [8] were coupled in turn to the GERG-2008 EoS [9] as implemented on REFPROP v10 [10] to predict the solubility of CO2 in different solvents (like N2, CH4, and H2).
Fichier non déposé

Dates et versions

hal-04352098 , version 1 (19-12-2023)

Identifiants

  • HAL Id : hal-04352098 , version 1

Citer

Wen-Hwa Siah, Marco Campestrini, Paolo Stringari. Solid phase I of carbon dioxide: a new Gibbs free energy equation of state and its application for the calculation of the solubility of CO2 in different solvents. Journées d’Etude des Equilibres entre Phases, Oct 2023, Rouen, France. ⟨hal-04352098⟩
22 Consultations
0 Téléchargements

Partager

Gmail Facebook X LinkedIn More