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Application of In Situ X-ray Absorption Spectroscopy to Study Dilute Chromium Ions in a Molten Chloride Salt

15 October 2019, Version 1
Working Paper
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

The local structure of dilute CrCl3 in a molten MgCl2:KCl salt was investigated by in situ x-ray absorption spectroscopy (XAS) at temperatures from room temperature to 800oC. This constitutes the first experiment where dilute Cr speciation is explored in a molten chloride salt, ostensibly due to the compounding challenges arising from a low Cr concentration in a matrix of heavy absorbers at extreme temperatures. CrCl3 was confirmed to be the stable species between 200 and 500oC, while mobility of metal ions at higher temperature (>700oC) prevented confirmation of the local structure.

Keywords

X-ray absorption spectroscopy investigation
Molten Salts
Corrosion

Supplementary materials

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Description
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Title
Moltensalt paper ESI Final
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Version History

Oct 15, 2019 Version 1

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The content is available under CC BY NC ND 4.0 [opens in a new tab]

DOI

10.26434/chemrxiv.9959807.v1
D O I: 10.26434/chemrxiv.9959807.v1 [opens in a new tab]

Funding

Lab Directed R&D Funds, Oak Ridge National Laboratory
U.S. DOE Office of Nuclear Energy
Molten Salts in Extreme Environments EFRC, U.S. DOE, Office of Science, Basic Energy Sciences

Author’s competing interest statement

The authors declare no conflict of interest.

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