TY - JOUR
T1 - Supercritical water desalination (SCWD) of multi-component brines
AU - van Wyk, Surika
AU - van der Ham, Aloijsius G.J.
AU - Kersten, Sascha R.A.
N1 - Funding Information:
This work was performed in the cooperative framework of Wetsus, European Centre of Excellence for Sustainable Water Technology (www.wetsus.nl). The project was funded by Wetsus and the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 665874. Wetsus is co-funded by the Dutch Ministry ofEconomic Affairs and Ministry of Infrastructure and Environment, the European Union Regional Development Fund, the Province of Fryslân and the Northen Netherlands Provinces. The authors would like to thank the participants of the research theme “Desalination” for the fruitful discussions and their financial support. The authors would like to thank Oscar Nachtegaal for his contribution to NaCl-KCl-H2O measurements for this work. The authors would also like to thank Benno Knaken and Johan Agterhorst for the continuous maintenance and reparations of the lab-scale set-up.
Funding Information:
This work was performed in the cooperative framework of Wetsus, European Centre of Excellence for Sustainable Water Technology ( www.wetsus.nl ). The project was funded by Wetsus and the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 665874 . Wetsus is co-funded by the Dutch Ministry ofEconomic Affairs and Ministry of Infrastructure and Environment , the European Union Regional Development Fund , the Province of Fryslân and the Northen Netherlands Provinces. The authors would like to thank the participants of the research theme “Desalination” for the fruitful discussions and their financial support. The authors would like to thank Oscar Nachtegaal for his contribution to NaCl-KCl-H 2 O measurements for this work. The authors would also like to thank Benno Knaken and Johan Agterhorst for the continuous maintenance and reparations of the lab-scale set-up.
Publisher Copyright:
© 2022 The Authors
PY - 2022/9
Y1 - 2022/9
N2 - The phase behaviour of two model multi-component salt-water mixtures (NaCl-KCl-H2O and NaCl-Na2SO4-H2O) was investigated for the application of supercritical water desalination (SCWD). The experimental investigation was a two-step procedure starting with qualitative analysis followed by quantitative measurements. The qualitative experiments served as a screening step to visually inspect phase behaviour. The quantitative results for NaCl-KCl-H2O, showed similarities in phase behaviour between the salts, which led to the assumption that the ternary mixture behaved as an ideal mixture between two binary solutions. The ternary equilibrium concentrations in the SCW phase could therefore be predicted using the binary salt-water models of the respective salts and accounting for the feed concentrations. Based on the quantitative results for NaCl-Na2SO4-H2O, the phase behaviour of the mixture was divided into three regions. The third region was the suitable region for SCWD, as the precipitated salts (Na2SO4) dissolved in the hydrothermal brine (NaCl), forming a vapour-liquid equilibrium.
AB - The phase behaviour of two model multi-component salt-water mixtures (NaCl-KCl-H2O and NaCl-Na2SO4-H2O) was investigated for the application of supercritical water desalination (SCWD). The experimental investigation was a two-step procedure starting with qualitative analysis followed by quantitative measurements. The qualitative experiments served as a screening step to visually inspect phase behaviour. The quantitative results for NaCl-KCl-H2O, showed similarities in phase behaviour between the salts, which led to the assumption that the ternary mixture behaved as an ideal mixture between two binary solutions. The ternary equilibrium concentrations in the SCW phase could therefore be predicted using the binary salt-water models of the respective salts and accounting for the feed concentrations. Based on the quantitative results for NaCl-Na2SO4-H2O, the phase behaviour of the mixture was divided into three regions. The third region was the suitable region for SCWD, as the precipitated salts (Na2SO4) dissolved in the hydrothermal brine (NaCl), forming a vapour-liquid equilibrium.
KW - Multi-component brines
KW - Phase equilibria
KW - Supercritical water desalination (SCWD)
KW - Thermodynamic modelling
KW - UT-Hybrid-D
UR - http://www.scopus.com/inward/record.url?scp=85136677441&partnerID=8YFLogxK
U2 - 10.1016/j.supflu.2022.105687
DO - 10.1016/j.supflu.2022.105687
M3 - Article
AN - SCOPUS:85136677441
VL - 188
JO - Journal of supercritical fluids
JF - Journal of supercritical fluids
SN - 0896-8446
M1 - 105687
ER -