ABSTRACT

Liquid organic hydrogen carriers (LOHC) are one of the potential candidates to assuage the problem of hydrogen storage. Prior to the storage step, hydrogen produced from electrolysis can contain a significant amount of water, which can lead to the formation of an undesired two-phase system in the LOHC storage tanks. In this work, solubility of water in potential liquid organic hydrogen carriers (toluene, dibenzyltoluene, and N-ethylcarbazol) in their hydrogenated and dehydrogenated forms as well as mixtures of these forms have been measured within the temperature range of (293 to 343) K. The solubility of water in LOHC materials is found to increase with temperature. This effect has been correlated using the Tsonopoulos and Wilson equation. Furthermore, various thermodynamic parameters such as Gibbs free energy, enthalpy, and entropy of dissolution were estimated based on the solubility data using the van t Hoff equation.

Compounds

#	Formula	Name
1	C7H8	toluene
2	C7H14	methylcyclohexane
3	H2O	water

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 3	Mole fraction - 3 ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Titration method	8
POMD	2 3	Mole fraction - 3 ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Titration method	9

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

Experimental Study of Solubility of Water in Liquid Organic Hydrogen Carriers

Aslam, R.[Rabya], Muller, K.[Karsten], Arlt, W.[Wolfgang]

ABSTRACT