Thermal Decomposition Process and Kinetics of Cerium Oxalate Decahydrate

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Abstract The differences of thermal decomposition of cerium oxalate decahydrate under N₂ and O₂ atmosphere were investigated and compared by performing TG-DSC in this work. The results indicated that under N₂ atmosphere, black elemental carbon would deposit on the surface of CeO₂. While under O₂ atmosphere, the calcined product was pale yellow, which was the color of CeO₂. The thermal decomposition process of cerium oxalate decahydrate under N₂ would go through three stages. Two processes would occur under O₂ atmosphere, the first process is the dehydration of cerium oxalate decahyrate; the second process is the decomposition of anhydrous cerium oxalate. The thermal decomposition mechanisms of cerium oxalate decahyrate under O₂ atmosphere were also studied. The activation energy for the first stage (dehydration process) was between 53.50 and 65.63 kJ·mol^-1, and the activation energy for the second stage was 156.52 kJ·mol^-1. The research on the thermal decomposition process and kinetics of cerium oxalate dehydrate could provide a crucial theoretical basis for the preparation of CeO₂.

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	Articles by authors
	Yuan Siwen
	Yang Jinyue
	Zhou Guanchen
	Xie Fei
	Huang Yunhai
	Tian Beiqian
	Wu Dehui
	Hou Xuefeng
	Huang Xin
	Hao Hongxun

Keywords： cerium oxalate decahydrate； TG-DSC； thermal decomposition process； thermal decomposition kinetics

Received 2020-10-10;

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Yuan Siwen, Yang Jinyue, Zhou Guanchen, Xie Fei, Huang Yunhai, Tian Beiqian, Wu Dehui, Hou Xuefeng, Huang Xin, Hao Hongxun.Thermal Decomposition Process and Kinetics of Cerium Oxalate Decahydrate[J] Chemcial Industry and Engineering, 2021,V38(4): 1-12

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