Abstract
The chemical interaction of He or He+0.1%H{sub 2} purge gases with Li{sub 4}SiO{sub 4} pebbles has been examined as a function temperature and partial pressure of water vapor by Temperature Programmed Reduction (TPR) and Temperature Programmed Desorption (TPD) measurements. The experimental conditions were selected to be representative of those envisaged occurring in the HCPB (Helium-Cooled Pebble Bed) blanket. At constant partial pressure of moisture, water adsorption on Li{sub 4}SiO{sub 4} decreases with increasing temperature up to 973K. Above that temperature water absorption increases due of the increasing water solubility of lithium hydroxide with temperature. Using these data, thermodynamic calculations have been carried out to evaluate the behavior of lithium orthosilicate in a moisture-containing environment. The evaluation was done over the 773 to 1173K temperature range. In general, the behavior of lithium orthosilicate was similar to earlier studies on lithium oxide except that the orthosilicate is not as strong in its deviations from ideality as the oxide. (author)
Citation Formats
Alvani, C, Casadio, S, and Johnson, C.
Thermodynamics of the Li{sub 4}SiO{sub 4}/H{sub 2}O system.
Japan: N. p.,
1998.
Web.
Alvani, C, Casadio, S, & Johnson, C.
Thermodynamics of the Li{sub 4}SiO{sub 4}/H{sub 2}O system.
Japan.
Alvani, C, Casadio, S, and Johnson, C.
1998.
"Thermodynamics of the Li{sub 4}SiO{sub 4}/H{sub 2}O system."
Japan.
@misc{etde_300361,
title = {Thermodynamics of the Li{sub 4}SiO{sub 4}/H{sub 2}O system}
author = {Alvani, C, Casadio, S, and Johnson, C}
abstractNote = {The chemical interaction of He or He+0.1%H{sub 2} purge gases with Li{sub 4}SiO{sub 4} pebbles has been examined as a function temperature and partial pressure of water vapor by Temperature Programmed Reduction (TPR) and Temperature Programmed Desorption (TPD) measurements. The experimental conditions were selected to be representative of those envisaged occurring in the HCPB (Helium-Cooled Pebble Bed) blanket. At constant partial pressure of moisture, water adsorption on Li{sub 4}SiO{sub 4} decreases with increasing temperature up to 973K. Above that temperature water absorption increases due of the increasing water solubility of lithium hydroxide with temperature. Using these data, thermodynamic calculations have been carried out to evaluate the behavior of lithium orthosilicate in a moisture-containing environment. The evaluation was done over the 773 to 1173K temperature range. In general, the behavior of lithium orthosilicate was similar to earlier studies on lithium oxide except that the orthosilicate is not as strong in its deviations from ideality as the oxide. (author)}
place = {Japan}
year = {1998}
month = {Mar}
}
title = {Thermodynamics of the Li{sub 4}SiO{sub 4}/H{sub 2}O system}
author = {Alvani, C, Casadio, S, and Johnson, C}
abstractNote = {The chemical interaction of He or He+0.1%H{sub 2} purge gases with Li{sub 4}SiO{sub 4} pebbles has been examined as a function temperature and partial pressure of water vapor by Temperature Programmed Reduction (TPR) and Temperature Programmed Desorption (TPD) measurements. The experimental conditions were selected to be representative of those envisaged occurring in the HCPB (Helium-Cooled Pebble Bed) blanket. At constant partial pressure of moisture, water adsorption on Li{sub 4}SiO{sub 4} decreases with increasing temperature up to 973K. Above that temperature water absorption increases due of the increasing water solubility of lithium hydroxide with temperature. Using these data, thermodynamic calculations have been carried out to evaluate the behavior of lithium orthosilicate in a moisture-containing environment. The evaluation was done over the 773 to 1173K temperature range. In general, the behavior of lithium orthosilicate was similar to earlier studies on lithium oxide except that the orthosilicate is not as strong in its deviations from ideality as the oxide. (author)}
place = {Japan}
year = {1998}
month = {Mar}
}