ABSTRACT

In this paper, we report heat capacity (CP) data for several glycol/H2O/MgCl2 systems at 303.15 to 353.15 K, measured via differential scanning calorimetry. Diethylene glycol (DEG), triethylene glycol (TEG), tetraethylene glycol (T4EG), propylene glycol (PG), dipropylene glycol (DPG) and tripropylene glycol (TPG) were the different glycols we mixed with water + MgCl2 to form ternary systems consisting of a fixed amount of a glycol (40 mass %) and variable H2O/MgCl2 proportions (4 to 16 mass % MgCl2). An extended Redlich-Kister-type equation was used to correlate heat capacity with concentration and temperature; the average absolute deviation (AAD) of the 198 data points from the corresponding values predicted by the correlation was 0.1 %. Therefore, the new set heat capacity data or the correlation, reported for the ternary system considered, can

Compounds

#	Formula	Name
1	C4H10O3	diethylene glycol
2	C6H14O4	triethylene glycol
3	C8H18O5	tetraethylene glycol
4	C3H8O2	1,2-propanediol
5	C6H14O3	4-oxa-1,7-heptanediol
6	C9H20O4	2-[2-(2-hydroxypropoxy)propoxy]-1-propanol
7	H2O	water
8	Cl2Mg	magnesium chloride

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	5	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Large sample (1 g) DSC	6
POMD	7 6	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Mole fraction - 6; Liquid	Pressure, kPa; Liquid	Liquid	Large sample (1 g) DSC	55
POMD	1 7 8	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Mass fraction - 7; Liquid	Mass fraction - 1; Liquid Pressure, kPa; Liquid	Liquid	Large sample (1 g) DSC	33
POMD	2 7 8	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Mass fraction - 7; Liquid	Mass fraction - 2; Liquid Pressure, kPa; Liquid	Liquid	Large sample (1 g) DSC	33
POMD	3 7 8	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Mass fraction - 7; Liquid	Mass fraction - 3; Liquid Pressure, kPa; Liquid	Liquid	Large sample (1 g) DSC	33
POMD	4 7 8	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Mass fraction - 7; Liquid	Mass fraction - 4; Liquid Pressure, kPa; Liquid	Liquid	Large sample (1 g) DSC	33
POMD	7 8 5	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Mass fraction - 7; Liquid	Mass fraction - 5; Liquid Pressure, kPa; Liquid	Liquid	Large sample (1 g) DSC	33
POMD	7 8 6	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Mass fraction - 7; Liquid	Mass fraction - 6; Liquid Pressure, kPa; Liquid	Liquid	Large sample (1 g) DSC	33

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Heat Capacity of Several Mixed-Solvent Desiccants Containing Glycol + Water + MgCl2

Lu, Y.-C.[Yu-Chyi], Caparanga, A. R.[Alvin R.], Li, M. -H.[Meng-Hui]

ABSTRACT