Issue 44, 2015

Determination of the thermodynamic activities of LiF and ThF4 in the LixTh1−xF4−3x liquid solution by Knudsen effusion mass spectrometry

Abstract

Knudsen effusion mass spectrometry (KEMS) has been used to investigate the vapour pressure over the molten LiF–ThF4 salt and determine the thermodynamic activity of LiF and ThF4 in the liquid solution. As part of the study, the vaporization of pure LiF and pure ThF4 was examined and the results were compared with the literature values finding a good agreement. Next, the vapour pressure of the LixTh1−xF4−3x liquid solution was investigated by measuring four samples having different compositions (XLiF ∼ 0.2, 0.4, 0.6, 0.8 mol%). In order to determine the thermodynamic activities, the vapour pressure of LiF and ThF4 species over the liquid solution, as calculated from our results, were compared with the vapour pressure over the pure LiF(l) and pure ThF4(l) systems. A strong deviation from the Raoult's law was observed, more evident in case of LiF species, in agreement with the predictions by our thermodynamic model.

Graphical abstract: Determination of the thermodynamic activities of LiF and ThF4 in the LixTh1−xF4−3x liquid solution by Knudsen effusion mass spectrometry

Article information

Article type
Paper
Submitted
11 Aug 2015
Accepted
19 Oct 2015
First published
26 Oct 2015
This article is Open Access
Creative Commons BY-NC license

Phys. Chem. Chem. Phys., 2015,17, 30110-30118

Determination of the thermodynamic activities of LiF and ThF4 in the LixTh1−xF4−3x liquid solution by Knudsen effusion mass spectrometry

E. Capelli, O. Beneš, J. Colle and R. J. M. Konings, Phys. Chem. Chem. Phys., 2015, 17, 30110 DOI: 10.1039/C5CP04777C

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. You can use material from this article in other publications, without requesting further permission from the RSC, provided that the correct acknowledgement is given and it is not used for commercial purposes.

To request permission to reproduce material from this article in a commercial publication, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party commercial publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements