A new methodology for measuring the enthalpies of mixing and heat capacities of molten chloride salts using high temperature drop calorimetry.

Autor:	Strzelecki AC; Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.; Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99164, USA.; Materials Science and Engineering Program, Washington State University, Pullman, Washington 99164, USA.; Department of Chemistry, Washington State University, Pullman, Washington 99164, USA., Cockreham CB; Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.; Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99164, USA.; The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, USA., Parker SS; Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA., Mann SC; Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA., Lhermitte C; Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA., Wu D; Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99164, USA.; Materials Science and Engineering Program, Washington State University, Pullman, Washington 99164, USA.; Department of Chemistry, Washington State University, Pullman, Washington 99164, USA.; The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, USA., Guo X; Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99164, USA.; Materials Science and Engineering Program, Washington State University, Pullman, Washington 99164, USA.; Department of Chemistry, Washington State University, Pullman, Washington 99164, USA., Monreal M; Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA., Jackson JM; Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA., Mitchell J; Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA., Boukhalfa H; Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA., Xu H; Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.; School of Molecular Sciences and Center for Materials of the Universe, Arizona State University, Tempe, Arizona 85287, USA.
Jazyk:	angličtina
Zdroj:	The Review of scientific instruments [Rev Sci Instrum] 2024 Jan 01; Vol. 95 (1).
DOI:	10.1063/5.0144910
Abstrakt:	Molten salt reactors (MSRs) are a promising alternative to conventional nuclear reactors as they may offer more efficient fuel utilization, lower waste generation, and improved safety. The state of knowledge of the properties of liquid salts is far from complete. In order to develop the MSR concept, it is essential to develop a fundamental understanding of the thermodynamic properties, including the heat capacities (Cp) and enthalpies of mixing (ΔHmix), of molten salts at MSR operating conditions. Historically, the Cp values of molten salts were determined by drop-calorimetry or differential scanning calorimetry, whereas their ΔHmix values were typically measured using specialized high temperature calorimeters. In this work, a new methodology for measuring both the Cp and the ΔHmix of molten chloride salts was developed. This novel method involves sealing a chloride salt sample in a nickel capsule and performing conventional transposed temperature drop calorimetry using a commercially available Setaram AlexSYS-800 Tian-Calvet twin microcalorimeter. This methodology may be applied to calorimetric measurements of more complex salt mixtures, especially mixtures containing actinides and fission products. (© 2024 Author(s). Published under an exclusive license by AIP Publishing.)
Databáze:	MEDLINE
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