This README file was generated on 2026-06-18 by Michael Wernhart.
Last updated: 2026-06-18.

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GENERAL INFORMATION
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// Title of Data: Replication Data for: WATER ACTIVITY AND SORPTION THERMODYNAMICS OF [EMIM][MESO3] AND BETAINE:GLYCEROL FROM EXPERIMENTAL VLE DATA
// DOI:https://doi.org/10.3217/52nz0-cch75
// Contact Information

     // Name: Michael Wernhart
     // Institution: Institute of Thermal Engineering, Graz University of Technology
     // Email: michael.wernhart@tugraz.at
  
// Contributors: Michael Wernhart, René Rieberer, Christoph Weinzettl, Marlene Kienberger, Markus Damm
// Kind of data: Excel worksheet (.xlsx) and figures (.png)
// Date of data collection/generation: 2025-01-01 - 2026-05-30
// Funding sources:  This project is funded by the Austrian Research Promotion Agency (“FFG”) under project number FO999905735 with funds from the Climate and Energy Fund and is carried out within the framework of the “Energy Research Program 2022”.

// Description of dataset: 
This dataset contains the data of the publication:
Wernhart, M., Rieberer, R., Weinzettl, C., Kienberger, M., Damm, M., 2026, WATER ACTIVITY AND SORPTION THERMODYNAMICS OF [EMIM][MESO3] AND BETAINE:GLYCEROL FROM EXPERIMENTAL VLE DATA.

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METHODOLOGICAL INFORMATION
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The dataset contains raw and derived data for the evaluation of water activity, viscosity, composition sensitivity, and viscosity-weighted transport indicators of the working pairs H2O/[EMIM][MeSO3] and H2O/betaine:glycerol.

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DATA & FILE OVERVIEW
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00_README.txt
01_Figure_1-Preparation_of_alternative_absorbents.jpg
02_Figure_2-Stepwise_screening_process.jpg
03_Figure_3-Schematic_illustration_of_the_VLE_measurement_procedure_and_Photograph_of_the_experimental_setup.jpg
04_Figure_4-Validation_of_the_VLE_test_rig.jpg
05_Figure_5-VLE_measurement_results.jpg
06_Figure_6-Experimentally_determined_water_activity.jpg
07_Figure_7-Comparison_of_measured_and_calculated_water_activities.jpg
08_Figure_8-ln_p_vs_-1_T-diagrams.jpg
09_Figure_9-Sensitivity_of_water_activity.jpg
10_Figure_10-Viscosity_data.jpg
11_Figure_11-Comparison_of_measured_and_calculated_viscosities.jpg
12_Figure_12-Transfer_indicators.jpg
13_Measurement_DATA_and_results.xlsx

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DATA-SPECIFIC INFORMATION FOR: Common
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|Abbreviation ... Description|
AHP ... Absorption heat pump / absorption chiller
COP ... Coefficient of performance [-]
DES ... Deep eutectic solvent
F ... Fick
H2O ... Water used as refrigerant
HBA ... Hydrogen-bond acceptor
HBD ... Hydrogen-bond donor
IL ... Ionic liquid
LiBr ... Lithium bromide
MS ... Maxwell–Stefan
VLE ... Vapour–liquid equilibrium
  
|Symbol (latin) ... Description|
aw ... Water activity [-]
c ... Cooling
b1, b2, b3, c0, c1, d0, d1 ... Fitting constants [-]
D ... Diffusion coefficient [m²·s⁻¹]
h ... Enthalpy [J·kg⁻¹]
K ... Boltzmann constant [J·K⁻¹]
p ... Pressure [mbar]
Q ̇ ... Heat flow rate / capacity [W]
r ... Radius [m]
R ... Universal gas constant [J·mol⁻¹·K⁻¹]
RMSE ... Root mean square error
t ... Temperature [°C]
T ... Temperature [K]
u ... Standard uncertainty
U ... Enhanced uncertainty [2·u]
w ... Water mass fraction [kgH2O·kgsol⁻¹]
x ... Water mole fraction [molH2O·molsol⁻¹]
X ... Water loading [kgH2O·kgsorb⁻¹]
  
|Symbol (greek) ... Description|
Δ ... Difference [-]
η ... Dynamic viscosity [mPa·s]
Γ ... Thermodynamic factor [-]
μ_w ... Chemical potential of water [J·mol⁻¹]
μ_w^0 ... Standard chemical potential of water [J·mol⁻¹]
π ... Pi [-]
Φ ... Mass transfer indicator [K·(Pa·s)⁻¹]
  
Subscript ... Description
fin ... Final
init ... Initial
norm ... normalized
sat ... Saturated
sol ... Aqueous absorbent solution
sorb ... Pure absorbent

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SHARING/ACCESS INFORMATION
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Use citation as recommended by the repository for use of this dataset.