***Hydrolysis of eutectic compositions in the ZnCl2:KCl:NaCl ternary system and effect of adding ZnO***

Authors:
Sepideh Niazi, Espen Olsen, Heidi S. Nygård
Faculty of science and technology, Norwegian University of Life Science (NMBU), Ås, Norway

Corresponding Author:
Sepideh Niazi

Contact information:
sepideh.niazi@nmbu.no

***Purpose of the experiments***
The datasets contain experimental data to investigate the properties of a ternary molten salt. Four compositions of ZnCl2:KCl:NaCl are investigated, including Salt #1: 60: 20: 20, Salt #2: 59.5: 21.9: 18.6, Salt #3: 52.9: 33.7: 13.4 and Salt #4: 44.3: 41.9:13.8 in mole fraction.

***Meltin point***
The dry salt is heated up to above melting point and then cooled down to below solidification point in electrical furnace. The temperature is controlled with 3 sensor along the furnace (Upper T, Mid T, Bottom T). 
Salt temperature is controlled by a thermocouple in contact with salt (Salt temperature).
The heating and cooling has been repeated few times for each composition.

Upper/Mid/Bottom T: Temperature of the furnace on different zones
Furnace temperature: The average of 3 zones
Salt temperature: Salt temperature recorded by thermocouple in contact with the salt
Derivation: Derivation of the salt temperature changing to clarify the undercoolings on the grapg


***Thermal stability***
The dry salt has been heated in electrical furnace. The electromagnetic field in the furnace had large effect on the weight measuring that has been romeved based on initial weight of molten salt and crucible!
Some data was so noisy and exponential smooting has been applied.

Weight (g): The recorded weight (Weigth of crucible + salt)
Initial salt weight: the weight of slat to start the experiment
Reactor weight: The weight of the setup before adding the salt
Salt weight: Weight of the salt during the experiment claculated by subtracting the setup weight from the total weight
Average effect of electromagnetic field: the electromagnetic field of the furnace effect the recorded weight. This effect need to be removed by subtracting from the initial weight as lng as there is no weight loss in the salt.
Removing electromagnetic field: The field effect is removed from the real weight by subtracting from the recorded weight
Remaining g mass: It shows the stability of the salt during the experiment


***Hydrolysis***
Results has been produced from two seperate system:1- Furnace and salt temperature controlling. 2-FTIR and outlet gas flow
The timing of these two system were not the same and the required calculations has been done to make them equal.
The results from FTIR were ppm in mass so the calculation has been done to provide the data in ppm in volum.

Water temperature: Shows the temperature of water (Water stem) which is added to the system to analyse the hydrolysis effect
Salt Temperature: The temperature of the salt recorded by the thermocouple in cantact with the salt
N2 Flow: The flow of the gass N2 which carry the water steam to the reactor
Time (minute) in FTIR result sheets: The FTIR time is adjusted according to the setup time to be able to connect the results
Hydrolysis acid formation (ppmm): Amount of the formed gas in the outlet in the unit of ppm in mass detected by FTIR
Hydrolysis acid formation (ppmv): Amount of the formed gas in the outlet in the unit of ppm in volume (calculated from the ppmm)



