Thermodynamic properties of ternary oxides of fission products from calorimetric measurements

Abstract The thermodynamic properties of fission products in molten salt and liquid metal have a great influence on the disposal of nuclear waste in the nuclear fuel cycle industrial system. This paper attempts to extract useful thermodynamic information from the only few experimental activities of lanthanides (Ce, Pr, La) in liquid Bi at different temperatures. The molecular interaction volume model (MIVM) was adopted to model and predict some temperature-dependent thermodynamic functions, including activity, infinite dilute activity coefficient, and molar excess Gibbs energy. The minor average of Δ G ¯ error indicated that assuming εji − εii is a constant is reasonable. On this basis, the natural logarithm of the interaction coefficients and the natural logarithm of the infinite dilute activity coefficient of lanthanides (Ce, Pr, La) in the Bi-based metal melt, these two parameters, show the linear relationship with the reciprocal of temperature. The reasonable agreement of the modeled thermodynamic parameters with the existing experimental data verified that the MIVM is quite convenient and reliable, which can provide guidance for separating fission products from molten salt reactors.

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Thermodynamic properties of propylene from calorimetric measurements

The Journal of Chemical Thermodynamics ◽

10.1016/0021-9614(74)90066-4 ◽

1974 ◽

Vol 6 (11) ◽

pp. 1039-1052 ◽

Cited By ~ 16

Author(s):

K. Bier ◽

G. Ernst ◽

J. Kunze ◽

G. Maurer

Keyword(s):

Thermodynamic Properties ◽

Calorimetric Measurements

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Thermodynamic Properties of CMSX-4 Superalloy: Results from the ThermoLab Project

Materials Science Forum ◽

10.4028/www.scientific.net/msf.508.591 ◽

2006 ◽

Vol 508 ◽

pp. 591-596 ◽

Cited By ~ 6

Author(s):

Mauro Palumbo ◽

Daniele Baldissin ◽

Livio Battezzati ◽

O. Tassa ◽

Rainer Wunderlich ◽

...

Keyword(s):

Thermodynamic Properties ◽

Specific Heat ◽

Enthalpy Of Fusion ◽

Experimental Results ◽

Thermodynamic Calculations ◽

Calorimetric Measurements ◽

Calibration Methods ◽

Thermocalc Software

This contribution reports the results of calorimetric measurements of the enthalpy of fusion and liquid specific heat carried out in different laboratories as part of the ground campaign of the Thermolab project. Different equipments and calibration methods have been used and critically evaluated. Thermodynamic calculations using the Thermocalc software have been performed and a comparison has been carried out with the experimental results.

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Calorimetric measurements of the specific energies of reaction of arsenic and of selenium with fluorine. Standard molar enthalpies of formation ΔfHom at the temperature 298.15 K of AsF5, SeF6, As2Se3, As4S4, and As2S3. Thermodynamic properties of AsF5 and SeF6 in the ideal-gas state. Critical assessment of ΔfHom(AsF3, l), and the dissociation enthalpies of As-F bonds

The Journal of Chemical Thermodynamics ◽

10.1006/jcht.1993.1042 ◽

1993 ◽

Vol 25 (3) ◽

pp. 391-402 ◽

Cited By ~ 14

Author(s):

P.A.G. O'Hare

Keyword(s):

Thermodynamic Properties ◽

Ideal Gas ◽

Critical Assessment ◽

Enthalpies Of Formation ◽

Calorimetric Measurements ◽

The Ideal

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Thermodynamic properties of ternary oxides of alkali metals from oxygen potential measurements

Journal of Nuclear Materials ◽

10.1016/0022-3115(89)90450-9 ◽

1989 ◽

Vol 167 ◽

pp. 265-270 ◽

Cited By ~ 8

Author(s):

R. Sridharan ◽

D. Krishnamurthy ◽

C.K. Mathews

Keyword(s):

Thermodynamic Properties ◽

Oxygen Potential ◽

Alkali Metals ◽

Ternary Oxides

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Calorimetric study of the digestion of gibbsite, Al(OH)3(cr), and thermodynamics of aqueous aluminate ion, Al(OH)4−(aq)

Canadian Journal of Chemistry ◽

10.1139/v91-247 ◽

1991 ◽

Vol 69 (11) ◽

pp. 1685-1690 ◽

Cited By ~ 16

Author(s):

Qiyuan Chen ◽

Yuming Xu ◽

Loren G. Hepler

Keyword(s):

Thermodynamic Properties ◽

Aqueous Sodium Hydroxide ◽

Sodium Aluminate ◽

Heat Capacities ◽

Enthalpies Of Formation ◽

Calorimetric Study ◽

Enthalpies Of Solution ◽

Calorimetric Measurements ◽

Wide Range ◽

Standard Enthalpies Of Formation

We have made calorimetric measurements of the enthalpies of solution of gibbsite, Al(OH)3(cr), in aqueous sodium hydroxide solutions at five temperatures from 100 to 150 °C. Results of these measurements have been used to obtain the standard enthalpies of formation of Na+(aq) + Al(OH)4−(aq) at the experimental temperatures. These results have also led to values of ΔCp0 for the reaction represented concisely by Al(OH)3(cr) + OH−(aq) = Al(OH)4−(aq), from which we have obtained standard state partial molar heat capacities of Na+(aq) + Al(OH)4−(aq). Combination of our results with those from earlier investigations has permitted calculation of thermodynamic properties of Na+(aq) + Al(OH)4−(aq) over a wide range of temperature and thence some generalizations about the usefulness of various equations for representing or predicting these thermodynamic properties. Key words: gibbsite, enthalpy of solution; sodium aluminate (aqueous), thermodynamic properties; heat capacities, Na+(aq) + Al(OH)4−(aq).

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