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

preprint
submitted on 09.10.2019 and posted on 15.10.2019 by Jisue Moon, Carter Abney, Dmitriy Dolzhnikov, James M. Kurley, Kevin A. Beyer, Joshua Wright, Sheng Dai, Richard T. Mayes, Stephen S. Raiman
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.

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

History

Email Address of Submitting Author

carter.w.abney@exxonmobil.com

Institution

ExxonMobil Research & Engineering Company

Country

United States of America

ORCID For Submitting Author

0000-0002-1809-9577

Declaration of Conflict of Interest

The authors declare no conflict of interest.

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