Abstract
Molten salts have favorable material properties for use in high-temperature energy systems, including thermal energy storage systems, concentrating solar power plants, nuclear reactors, and various industrial manufacturing processes. Knowledge of chemical and thermophysical property data is essential for the design and optimization of these systems, yet data are often limited or uncertain for many candidate salts due to the difficulty of thermophysical property measurements at relevant temperatures (e.g., 500-900 °C). Here, the density of molten LiF-NaF-KF eutectic is reassessed through review of previous experimental data, new density measurements from 470 to 800 °C, and semiempirical modeling. The density was measured using the displacement technique. Compositional and temperature-dependent density estimates were calculated with a multidimensional Redlich-Kister model. The results of the new experimental measurements agree within 2% of the modeled density of molten eutectic LiF-NaF-KF. The Redlich-Kister model's prediction shows a near-ideal density behavior for the LiF-NaF-KF system and is promising for the estimation of off-eutectic LiF-NaK-KF densities. Finally, through review of the existing literature and comparison to new measurements, recommendations are made for the density of LiF-NaF-KF.
| Original language | English |
|---|---|
| Pages (from-to) | 1406-1414 |
| Number of pages | 9 |
| Journal | Journal of Chemical and Engineering Data |
| Volume | 67 |
| Issue number | 6 |
| DOIs | |
| State | Published - Jun 9 2022 |
Funding
The authors acknowledge the assistance at ORNL of Dino Sulejmanovic for chemical impurity analysis of the salt sample and reviewers of the manuscript. This research was funded by The U.S. Department of Energy, Office of Nuclear Energy, Molten Salt Reactor Campaign. This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains, and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ).
| Funders | Funder number |
|---|---|
| Molten Salt Reactor Campaign | |
| U.S. Department of Energy | |
| Office of Nuclear Energy |
