Kinetics and Mechanism of Thermal Decomposition of Uranyl Oxalate
Charu Arora Chugh
Department of Chemistry, Banasthali Vidyapeeth (Deemed University), Banasthali-304 022, India ; Department of Chemistry, Lovely Professional University, Jalandhar-144 402, India
Asmita Sharma
Department of Chemistry, Banasthali Vidyapeeth (Deemed University), Banasthali-304 022, India
Aditi Sharma
Department of Chemistry, Banasthali Vidyapeeth (Deemed University), Banasthali-304 022, India
Y.P. Naik
Product Development Division, Radiochemistry and Isotope Group, Bhabha Atomic Research Centre, Mumbai-400 085, India
G.A. Rama Rao
Product Development Division, Radiochemistry and Isotope Group, Bhabha Atomic Research Centre, Mumbai-400 085, India
shalu
Department of Chemistry, Banasthali Vidyapeeth (Deemed University), Banasthali-304 022, India
Corresponding Author(s) : Charu Arora Chugh
charuarora77@gmail.com
Asian Journal of Chemistry,
Vol. 23 No. 4 (2011): Vol 23 Issue 4
Uranyl oxalate was prepared and its thermal decomposition in argon environment was studied using TGA, DTA, DSC and quadrupole mass analyzer. It was observed that uranyl oxalate decomposed into mixture of U3O8 and UO2.13 with the evolution of carbon monoxide, oxygen and carbon dioxide in the temperature range of 573-673 K. But beyond this temperature U3O8 and UO2.13 appeared as intermediate and the final product was found to be UO2.12. This solid state decomposition was found to obey AE4 mechanism represented by the kinetic equation k × t = [-ln (1 - a)]3/4. The activation energy of the reaction was found to be 824.83 kJ/mol. The heat of reaction and the entropy of the reaction were found to be 832.2 kJ/mol and 902.0 J/K/mol, respectively.
Arora Chugh, C., Sharma, A., Sharma, A., Naik, Y., Rama Rao, G., & shalu, . (2010). Kinetics and Mechanism of Thermal Decomposition of Uranyl Oxalate. Asian Journal of Chemistry, 23(4), 1865–1866. Retrieved from https://asianpubs.org/index.php/ajchem/article/view/10236
