@inproceedings{bb04c3aac6294502a8dec438bb07ccee,
title = "Sublimation Kinetics of Zirconium Tetrachloride (ZrCl4) for Producing Zr Sponge",
abstract = "Sublimation of ZrCl4 is important for the production of nuclear grade metallic Zr in Kroll's process. The sublimation kinetics of ZrCl 4 was investigated by TGA under both isothermal and non-isothermal conditions. The sublimation rate of ZrCl4 increased with increasing temperature under isothermal conditions. ZrCl4 sublimation was confirmed to be a zero-order process under isothermal conditions, whereas it was first-order kinetics under non-isothermal conditions. The activation energy of ZrCl4 sublimation under isothermal conditions was 21.7 kJ/mol. The activation energy for non-isothermal sublimation was 101.4 kJ/mol and 108.1 kJ/mol with the Kissinger method and Flynn-Wall-Ozawa method, respectively. These non-isothermal activation energies were very close to the heat of sublimation (103.3 kJ/mol). Sublimation occurs by two elementary steps: surface reaction and desorption. Therefore, the overall activation energy of ZrCl 4 sublimation is 104.8(±3.4) kJ/mol. The activation energy of the surface reaction and desorption steps are proposed to be 83.1 kJ/mol and 21.7 kJ/mol, respectively.",
keywords = "Activation energy, Desorption step, Sublimation kinetics, Surface reaction step, TGA",
author = "Shin, {Jae Hong} and Choi, {Mi Sun} and Min, {Dong Joon} and Park, {Joo Hyun}",
year = "2014",
doi = "10.1002/9781118888551.ch28",
language = "English",
isbn = "9781118888827",
series = "TMS Annual Meeting",
publisher = "Minerals, Metals and Materials Society",
pages = "149--156",
booktitle = "Rare Metal Technology 2014 - Held During TMS 2014 143rd Annual Meeting and Exhibition",
address = "United States",
note = "Rare Metal Technology 2014 - TMS 2014 143rd Annual Meeting and Exhibition ; Conference date: 16-02-2014 Through 20-02-2014",
}