On the efficiency of a hydrogel-based desalination cycle

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F17%3A10368327" target="_blank" >RIV/00216208:11310/17:10368327 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.desal.2017.03.027" target="_blank" >https://doi.org/10.1016/j.desal.2017.03.027</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.desal.2017.03.027" target="_blank" >10.1016/j.desal.2017.03.027</a>

Jazyk výsledku

angličtina

Název v původním jazyce

On the efficiency of a hydrogel-based desalination cycle

Popis výsledku v původním jazyce

Polyelectrolyte based hydrogels swollen in seawater can release partially desalinated water under compression, and hence can be used as desalination agents. We use a previously developed model for the swelling of a hydrogel based on earlier work by Katchalsky and Michaeli to analyse the thermodynamic costs of a full desalination cycle. We investigate salt concentrations from 0.6 mol/l down to 10(-3) mol/l, thereby covering the full range from sea water to potable water, and investigate gels with varying crosslinking degree N and charge fraction alpha. Our results demonstrate that most efficient are either strongly charged gels with high degree of crosslinking, or gels with intermediate charge fraction and low crosslinking degree. Our analytical model allows us to extract the mechanical work needed to compress the gel, and ultimately to calculate the energy cost to desalinate water by using a hydrogel as a desalination agent. Our theoretical results suggest that hydrogels can compete in energy costs with other standard desalination methods.

Název v anglickém jazyce

On the efficiency of a hydrogel-based desalination cycle

Popis výsledku anglicky

Polyelectrolyte based hydrogels swollen in seawater can release partially desalinated water under compression, and hence can be used as desalination agents. We use a previously developed model for the swelling of a hydrogel based on earlier work by Katchalsky and Michaeli to analyse the thermodynamic costs of a full desalination cycle. We investigate salt concentrations from 0.6 mol/l down to 10(-3) mol/l, thereby covering the full range from sea water to potable water, and investigate gels with varying crosslinking degree N and charge fraction alpha. Our results demonstrate that most efficient are either strongly charged gels with high degree of crosslinking, or gels with intermediate charge fraction and low crosslinking degree. Our analytical model allows us to extract the mechanical work needed to compress the gel, and ultimately to calculate the energy cost to desalinate water by using a hydrogel as a desalination agent. Our theoretical results suggest that hydrogels can compete in energy costs with other standard desalination methods.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/GJ17-02411Y" target="_blank" >GJ17-02411Y: Modelování responzivních polymerních gelů na různých škálách</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Desalination

ISSN

0011-9164

e-ISSN

—

Svazek periodika

414

Číslo periodika v rámci svazku

July

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

28-34

Kód UT WoS článku

000402946500004

EID výsledku v databázi Scopus

2-s2.0-85016334101