ABSTRACT

Mixtures of heavy aromatics with high aliphatics are important in the formation of asphaltenes in the oil industry. This work reports binary solid liquid equilibria for naphtalene + eicosane, +pentacosane, +hexatriacontane mixtures by differential scanning calorimetry. Results are compared with those from modified UNIFAC (Larsen and Gmehling versions) and ideal predictions. Finally, we determine the purity according to van t Hoff equation. Results are in good agreement with values given by ultraviolet spectrophotometry.

Compounds

#	Formula	Name
1	C10H8	naphthalene
2	C20H42	eicosane
3	C25H52	pentacosane
4	C36H74	hexatriacontane

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	Molar enthalpy of transition or fusion, kJ/mol ; Crystal 1			Crystal 1 Liquid Air at 1 atmosphere	DSC	1
POMD	1	Normal melting temperature, K ; Crystal 1			Crystal 1 Liquid Air at 1 atmosphere	DTA:corrimp	1
POMD	2	Molar enthalpy of transition or fusion, kJ/mol ; Crystal 1			Crystal 1 Liquid Air at 1 atmosphere	DSC	1
POMD	2	Normal melting temperature, K ; Crystal 1			Crystal 1 Liquid Air at 1 atmosphere	DTA:corrimp	1
POMD	3	Molar enthalpy of transition or fusion, kJ/mol ; Crystal 1			Crystal 1 Liquid Air at 1 atmosphere	DSC	1
POMD	3	Molar enthalpy of transition or fusion, kJ/mol ; Crystal 3			Crystal 3 Crystal 2 Air at 1 atmosphere	DSC	1
POMD	3	Molar enthalpy of transition or fusion, kJ/mol ; Crystal 2			Crystal 2 Crystal 1 Air at 1 atmosphere	DSC	1
POMD	3	Triple point temperature, K ; Crystal 3			Crystal 3 Crystal 2 Air at 1 atmosphere	DTA:corrimp	1
POMD	3	Triple point temperature, K ; Crystal 2			Crystal 2 Crystal 1 Air at 1 atmosphere	DTA:corrimp	1
POMD	3	Normal melting temperature, K ; Crystal 1			Crystal 1 Liquid Air at 1 atmosphere	DTA:corrimp	1
POMD	4	Molar enthalpy of transition or fusion, kJ/mol ; Crystal 1			Crystal 1 Liquid Air at 1 atmosphere	DSC	1
POMD	4	Molar enthalpy of transition or fusion, kJ/mol ; Crystal 3			Crystal 3 Crystal 2 Air at 1 atmosphere	DSC	1
POMD	4	Molar enthalpy of transition or fusion, kJ/mol ; Crystal 2			Crystal 2 Crystal 1 Air at 1 atmosphere	DSC	1
POMD	4	Triple point temperature, K ; Crystal 3			Crystal 3 Crystal 2 Air at 1 atmosphere	DTA:corrimp	1
POMD	4	Triple point temperature, K ; Crystal 2			Crystal 2 Crystal 1 Air at 1 atmosphere	DTA:corrimp	1
POMD	4	Normal melting temperature, K ; Crystal 1			Crystal 1 Liquid Air at 1 atmosphere	DTA:corrimp	1
POMD	1 2	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 2	DTA	8
POMD	1 2	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	DTA	18
POMD	1 3	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 3	DTA	7
POMD	1 3	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	DTA	13
POMD	1 4	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal 1 - 4	DTA	4
POMD	1 4	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal 2 - 4	DTA	2
POMD	1 4	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal 1 - 4	DTA	5
POMD	1 4	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	DTA	10

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Solid liquid equilibria and purity determination for binary n-alkane + naphthalene systems

Khimeche, K.[Kamel], Boumrah, Y.[Yacine], Benziane, M.[Mokhtar], Dahmani, A.[Abdallah]

ABSTRACT