On the Phase Behaviour of the CO2 + N2O4 system at low temperatures

Christophe Coquelet (1, 2, 3, 4) , Esther Neyrolles (1) , Alain Valtz (1) , Antonin Chapoy (5, 1)

1 CTP - Centre Thermodynamique des Procédés
2 Mines Paris - PSL (École nationale supérieure des mines de Paris)
3 PSL - Université Paris sciences et lettres
4 RAPSODEE - Centre de recherche d'Albi en génie des procédés des solides divisés, de l'énergie et de l'environnement
5 HWU - Heriot-Watt University [Edinburgh]

Carbon dioxide capture transportation and storage is one of the technologies that can be employed to reduce CO 2 emissions from power plants. Unfortunately, in the post combustion capture process, CO 2 is not pure and contains impurities like SO 2 , NO x , N 2 , O 2 and Ar for example. In this paper, Vapour-Liquid-Equilibrium (VLE) of a binary system composed of CO 2 and N 2 O 4 /NO 2 have been investigated. The equipment used is based on the "staticsynthetic" method with a variable cell to determine the bubble pressure or saturated pressure of the system. The setup was used to obtain bubble point data at four isotherms (253.43, 273.43, 293.43, 303.43) K and pressures up to 7.3 MPa. The accuracies of the measured temperature and pressure were estimated to be 0.03 K and 0.12 kPa, respectively. The Peng-Robinson equation of state (PR78 EoS) is used to represent the isothermal P, x data.

Mots clés: Bubble pressure; PVT; Thermodynamic Modelling; Carbon dioxide; Nitrogen Oxides

Domaines: Génie chimique; Chimie théorique et/ou physique

Christophe Coquelet, Esther Neyrolles, Alain Valtz, Antonin Chapoy. On the Phase Behaviour of the CO2 + N2O4 system at low temperatures. Chemical Engineering Science, 2022, 258, ⟨10.1016/j.ces.2022.117726⟩. ⟨hal-03669295⟩