Thermodynamic model for a reversible desalination cycle using weak polyelectrolyte hydrogels
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F18%3A10386201" target="_blank" >RIV/00216208:11310/18:10386201 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.desal.2018.05.002" target="_blank" >https://doi.org/10.1016/j.desal.2018.05.002</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.desal.2018.05.002" target="_blank" >10.1016/j.desal.2018.05.002</a>
Alternative languages
Result language
angličtina
Original language name
Thermodynamic model for a reversible desalination cycle using weak polyelectrolyte hydrogels
Original language description
The recently proposed use of hydrogels for water desalination is based on the decrease of salt concentration in the gel upon compression. In the first experiments, desalination cycles using hydrogels involved an irreversible mixing step, which inevitably reduced the thermodynamic efficiency. This approach could become competitive with membrane-based desalination methods if it could work close to maximum thermodynamic efficiency. In this work, we develop a thermodynamic model for compression of weak polyelectrolyte hydrogels in open and closed systems. We use this model to design a fully reversible desalination cycle which can, in principle, achieve maximum thermodynamic efficiency. We also show that compressing weak polyelectrolyte hydrogels at low salinity decreases their ionization, thereby leading to a non-monotonic dependence of salt concentration on the gel compression. Therefore, our model shows how to redesign the desalination cycle when using weak polyelectrolytes at low salinities.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
<a href="/en/project/GJ17-02411Y" target="_blank" >GJ17-02411Y: Multiscale modeling of responsive polymer gels</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Desalination
ISSN
0011-9164
e-ISSN
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Volume of the periodical
442
Issue of the periodical within the volume
December
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
12
Pages from-to
32-43
UT code for WoS article
000438003900004
EID of the result in the Scopus database
2-s2.0-85047188334