An international journal published by K. N. Toosi University of Technology

Document Type : Research Article

Authors

Nuclear Fuel Cycle Research School‎, ‎Nuclear Science and Technology Research Institute‎, ‎P.O‎. ‎Box‎: ‎11365-8486‎, ‎Tehran‎, ‎Iran

10.22034/rpe.2022.342624.1089

Abstract

Since the production of tellurium hexafluoride gas requires the design of a suitable reactor system, so the study of tellurium oxide fluorination kinetics is of great importance. For this purpose, a novel laboratory system was designed and constructed to study the fluorination reactions by the volumetric method. Fluorine gas was injected into the reactor containing a tellurium oxide pellet, and the reaction was studied by following the changes in pressure of the gas phase using a pressure transmitter instrument. In this volumetric system, the kinetic parameters of the reaction between tellurium oxide pellet and fluorine gas have been derived for a pressure range of 137.9 and 181.2 kPa by monitoring the gas phase pressure. The reaction temperature was adjusted to 204±1 C using a heater. The results showed that the fluorination reaction of tellurium oxide is a first-order reaction. The reaction rate constant is calculated to be 6.86 × 10-4 s-1.

Highlights

  • The kinetic reaction of tellurium hexafluoride synthesis was studied using the volumetric method.
  • A laboratory system was designed and constructed for the volumetric method.
  • The fluorination of tellurium oxide was a first-order reaction in the temperature of 204 ± 1 C

Keywords

Main Subjects

Barbe, J., Barbier, J.-P., Currie, J., et al. (2007). Code of practice-compressed fluorine and mixtures with inert gases.
Benedict, M., Pigford, T. H., and Levi, H. W. (1981). Nuclear chemical engineering. McGraw-Hill Education.
Campbell, R. and Robinson, P. (1956). 668. The fluorination of tellurium. Ditellurium decafluoride and tellurium oxyfluorides. Journal of the Chemical Society (Resumed), pages 3454–3458.
Labaton, V. and Johnson, K. (1959). The fluorides of uranium-III kinetic studies of the fluorination of uranium tetrafluoride by flourine. Journal of Inorganic and Nuclear Chemistry, 10(1-2):74–85.
Szekely, J. (2012). Gas-solid reactions. Elsevier.
Wang, J.-Y., Mangano, E., Brandani, S., et al. (2021). A review of common practices in gravimetric and volumetric adsorption kinetic experiments. Adsorption, 27(3):295–318.
Williams Jr, R. R. (1948). Nuclear Chemistry of Tellurium: Chemical Effects of Isomeric Transition. The Journal of Chemical Physics, 16(5):513–519.