ABSTRACT

In this paper, phase equilibrium and viscosity data were experimentally obtained for a CO2+ndodecane (n-C12H26) binary mixture. The experiments, which were conducted with a custom-made PVT cell of variable volume connected to an oscillating-piston viscometer, considered CO2-based mixtures with mole factions between 0.2 and 0.8, and temperatures spanning from 283 to 353 K. The experimental tests were complemented with a theoretical analysis, which relied on the PengRobinson, PC-SAFT and PCP-SAFT equations of state (EoS) to correlate the bubble point pressure, while the friction theory (f-theory) coupled to either the Peng-Robinson or the PC-SAFT EoS was used to correlate the measured viscosity. The analysis revealed that the smallest absolute deviations for the bubble point pressure and viscosity, respectively, are 2.2 % and 8.51 %, and were obtained with PCP-SAFT EoS and f-theory/PC-SAFT.

Compounds

#	Formula	Name
1	CO2	carbon dioxide
2	C12H26	dodecane
3	CHClF2	chlorodifluoromethane

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	1	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid		Liquid Gas	Closed cell (Static) method	5
POMD	2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Moving piston method	10
POMD	1 2	Vapor or sublimation pressure, kPa ; Liquid	Mole fraction - 1; Liquid Temperature, K; Liquid		Liquid Gas	Closed cell (Static) method	20
POMD	1 2	Viscosity, Pa*s ; Liquid	Mole fraction - 1; Liquid Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Moving piston method	20
POMD	1 3	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid	Mole fraction - 1; Liquid	Liquid Gas	Closed cell (Static) method	5

Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Phase Equilibrium and Liquid Viscosity of CO2 + n-Dodecane Mixtures between 283 and 353 K

Czubinski, F. F.[Fernando F.], Sanchez, C. J. N.[Carlos J. Noriega], da Silva, A. K.[Alexandre K.], Neto, M. A. M.[Moises A. Marcelino], Barbosa, Jr., J. R.[Jader R.]

ABSTRACT