ABSTRACT

Solubility behaviors of binary HFC-125 (CF3-CF2H), HFE-125 (CF3-O-CF2H), HFC-143a (CF3-CH3), and HFE-143a (CF3-O-CH3) systems with room-temperature ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([emim][Tf2N]) have been studied using a gravimetric microbalance method from (283 to 348) K and/or volumetric and cloud-point methods. Vapor liquid equilibrium (VLE) data for HFC-125 + [emim][Tf2N] and HFE-125 + [emim][Tf2N] systems have been well correlated with our equation-of-state (EOS) model, which predicted vapor liquid liquid equilibria (VLLE) for both of these binary systems, and the VLLE have been experimentally proved. As for the binary systems of HFC-143a + [emim][Tf2N] and HFE-143a + [emim][Tf2N], only VLLE experiments have been made, and partial miscibility (temperature and composition: VLLE-Tx) data are well correlated with the NRTL (nonrandom two-liquids) activity model. While the immiscibility gap of the HFC-125 binary system is smaller than that of the HFE-125 system, the immiscibility behaviors for the HFC-143a and HFE-143a systems are opposite; the HFE-143a system is more soluble.

Compounds

#	Formula	Name
1	C2HF5	pentafluoroethane
2	C8H11F6N3O4S2	1-ethyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)imide
3	C2HF5O	(difluoromethoxy)trifluoromethane
4	C2H3F3	1,1,1-trifluoroethane
5	C2H3F3O	trifluoromethoxymethane

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	Phase	Method	#Points
POMD	1 2	Triple point temperature, K ; Liquid mixture 1	Mole fraction - 1; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2 Gas	cloud point method	3
POMD	1 2	Molar volume, m3/mol ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2 Gas	Other PVT measurement	4
POMD	1 2	Molar volume, m3/mol ; Liquid mixture 2	Temperature, K; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1 Gas	Other PVT measurement	4
POMD	1 2	Mole fraction - 1 ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2 Gas	volumetric method	4
POMD	1 2	Mole fraction - 1 ; Liquid mixture 2	Temperature, K; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1 Gas	volumetric method	4
POMD	1 2	Mole fraction - 1 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid Gas	gravimetric microbalance	36
POMD	3 2	Triple point temperature, K ; Liquid mixture 1	Mole fraction - 3; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2 Gas	cloud point method	3
POMD	3 2	Molar volume, m3/mol ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2 Gas	Other PVT measurement	4
POMD	3 2	Molar volume, m3/mol ; Liquid mixture 2	Temperature, K; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1 Gas	Other PVT measurement	4
POMD	3 2	Mole fraction - 3 ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2 Gas	volumetric method	4
POMD	3 2	Mole fraction - 3 ; Liquid mixture 2	Temperature, K; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1 Gas	volumetric method	4
POMD	3 2	Mole fraction - 3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid Gas	gravimetric microbalance	29
POMD	4 2	Triple point temperature, K ; Liquid mixture 1	Mole fraction - 4; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2 Gas	cloud point method	2
POMD	4 2	Molar volume, m3/mol ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2 Gas	Other PVT measurement	3
POMD	4 2	Molar volume, m3/mol ; Liquid mixture 2	Temperature, K; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1 Gas	Other PVT measurement	3
POMD	4 2	Mole fraction - 4 ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2 Gas	volumetric method	3
POMD	4 2	Mole fraction - 4 ; Liquid mixture 2	Temperature, K; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1 Gas	volumetric method	3
POMD	5 2	Triple point temperature, K ; Liquid mixture 1	Mole fraction - 5; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2 Gas	cloud point method	2
POMD	5 2	Molar volume, m3/mol ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2 Gas	Other PVT measurement	4
POMD	5 2	Molar volume, m3/mol ; Liquid mixture 2	Temperature, K; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1 Gas	Other PVT measurement	4
POMD	5 2	Mole fraction - 5 ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2 Gas	volumetric method	4
POMD	5 2	Mole fraction - 5 ; Liquid mixture 2	Temperature, K; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1 Gas	volumetric method	4

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

Binary Vapor Liquid and Vapor Liquid Liquid Equilibria of Hydrofluorocarbons (HFC-125 and HFC-143a) and Hydrofluoroethers (HFE-125 and HFE-143a) with Ionic Liquid [emim][Tf2N]

Shiflett, M. B.[Mark B.], Yokozeki, A.

ABSTRACT