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  4. Mass transfer modeling of absorption and desorption behavior of atmospheric water with an aqueous potassium acetate solution in a packed column
 
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2025
Journal Article
Title

Mass transfer modeling of absorption and desorption behavior of atmospheric water with an aqueous potassium acetate solution in a packed column

Abstract
The potential of absorptive atmospheric water generation using a liquid salt solution offers the advantage of good scalability and specific uptake potential for atmospheric water. To investigate the sorption kinetics of an aqueous potassium acetate solution, a packed column experimental setup was constructed. A total of 99 runs were conducted to determine the sorption kinetics and the impact of varying experimental parameters. A maximum absorption rate of up to 8.6 g/s from the air was achieved with the mass flow rates and the inlet air humidity having the greatest positive impact on the absorption rate. Furthermore, the mass transfer was modeled using three distinct models for the mass transfer coefficients and the effective mass transfer area. The findings indicate that the Billet-Schultes model exhibits the least deviation from the observed results with an average of 15.6 % for absorption. The Onda (22.7 %) and Hanley-Chen model (16.8 %) demonstrate comparatively higher average deviations.
Author(s)
Potyka, Julius
Universität Stuttgart
Dalibard, Antoine  
Fraunhofer-Institut für Grenzflächen- und Bioverfahrenstechnik IGB  
Tovar, Günter  
University of Stuttgart
Journal
Chemical Engineering Science  
Open Access
DOI
10.1016/j.ces.2025.121503
Additional full text version
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Language
English
Fraunhofer-Institut für Grenzflächen- und Bioverfahrenstechnik IGB  
Keyword(s)
  • Aqueous salt solution

  • Experimental investigation

  • Mass transfer correlation

  • Packed column

  • Sorption modeling

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