Equilibrium pressures over BeF2LiF(FLIBE) molten mixtures

被引：21

作者：

Olander, DR ^{[1
]}

Fukuda, GT ^{[1
]}

Baes, CF ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA

来源：

FUSION SCIENCE AND TECHNOLOGY | 2002年 / 41卷 / 02期

关键词：

Flibe; molten salt; vapor pressure;

D O I：

10.13182/FST02-A208

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

The pressures of the vapor species in equilibrium with Flibe at similar to600degreesC are determined from work by, Buchler and Stauffer and by Baes and coworkers. The former authors show that the principal vapor species are BeF2(g) and LiBeF3(g). The measurements and the theoretical model of Baes provide accurate values of the activity, coefficient of BeF2 in Flibe. 11,When combined with the vapor pressure of pure BeF2, the equilibrium pressure of BeF2 is determined as a function of melt composition and temperature. The activity coefficient of LiF is not measured, but it is obtained by application of the Gibbs-Duhem equation to the measured activity coefficient of BeF2. Thus, the partial pressure of LiF(g) is also known. The pressure of the mixed dimer LiBeF3 is calculated from the gas phase equilibrium for the formation of the dimer from the two monomers, with the equilibrium constant given by Buchler and Stauffer. The vapor pressure at 600degreesC extrapolated from high-temperature Oak Ridge National Laboratory data is similar to60% higher than the predicted values.

引用

页码：141 / 150

页数：10

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