Equilibrium pressure and solubility of hydrogen in liquid lithium

Journal Article · Tue Mar 01 00:00:00 EST 1977 · Nucl. Technol.; (United States)

OSTI ID:7216275

Katsuta, H; Ishigai, T; Furukawa, K

Equilibrium hydrogen pressures (P/sub H/sub 2//) were measured for the two-phase system, Li-LiH, for the liquid lithium of dilute solutions of 2.0 x 10/sup -3/ to 1.3 x 10/sup -2/ atomic ratio (H/Li), and for the liquid lithium controlled by a cold trap at temperatures between 200 and 450/sup 0/C. From the variation of P/sub H/sub 2// with temperature, the apparent heat of solution of hydrogen in liquid lithium was obtained as 34 and 19 kcal/mol for the Li-LiH and for the dilute solutions, respectively. For the liquid lithium controlled by the cold trap at 203/sup 0/C, the heat of solution was 19 kcal/mol. Using the Sieverts constant, which was obtained experimentally in this work, it was possible to determine the hydrogen concentration in liquid lithium from the P/sub H/sub 2//. The hydrogen-solubility in liquid lithium in the concentration <2 x 10/sup -2/ H/Li (corresponding to the temperature lower than 350/sup 0/C) was estimated from the hydrogen concentration data obtained through the P/sub H/sub 2// of the Li-LiH system. Although the cold trap could effectively control the hydrogen concentration in liquid lithium, this solubility was apparently lower than that obtained from the Li-LiH by factors of 2 to 3 at the same temperature. The difference can be attributed to the interactions among hydrogen and other impurities and to compound formations such as Li/sub 2/H.

• Research Organization: Japan Atomic Energy Research Inst., Tokai-mura, Ibaraki-ken
• OSTI ID: 7216275
• Journal Information: Nucl. Technol.; (United States), Vol. 32:3
• Country of Publication: United States
• Language: English

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