Dehydration, hydrolysis and oxidation of cerium chloride heptahydrate in air atmosphere
来源期刊：Journal of Rare Earths2017年第11期
论文作者：Shoufeng Xue Wenyuan Wu Xue Bian Yongfu Wu
文章页码：1156 - 1163
摘 要：The thermal decomposition of CeCl3·7 H2 O was studied from room temperature to 800 ℃. Analysis was performed by applying TG-DTA, XRD, FESEM, EDXS, and TG-MS technologies to investigate the thermal decomposition mechanism of CeCl3·7 H2 O in air atmosphere. Multiple forms of hydrated cerium chloride compound were observed in the dehydration products. The CeCl3 hydrolysis product was separated by a continuous centrifugation method and the phase composition was identified as CeO2,Ce（OH）3,and CeCl3·4 H2 O by XRD analysis. The evolved gas composition was identified as CI2 and HCI by TG-MS system. Based on the analysis of the experimental results, the mechanism of thermal decomposition of CeCl3·7 H2 O was proposed with completion of the dehydration reaction at 224 ℃,the hydrolysis reaction at 170-480 ℃,and the oxidation reaction of CeCl3 above 480 ℃.
Shoufeng Xue1，Wenyuan Wu1，Xue Bian1，Yongfu Wu1,2
1. Metallurgy School of Northeastern University2. School of Energy and Environmental Engineering,Inner Mongolia University of Science and Technology
摘 要：The thermal decomposition of CeCl3·7 H2 O was studied from room temperature to 800 ℃. Analysis was performed by applying TG-DTA, XRD, FESEM, EDXS, and TG-MS technologies to investigate the thermal decomposition mechanism of CeCl3·7 H2 O in air atmosphere. Multiple forms of hydrated cerium chloride compound were observed in the dehydration products. The CeCl3 hydrolysis product was separated by a continuous centrifugation method and the phase composition was identified as CeO2,Ce（OH）3,and CeCl3·4 H2 O by XRD analysis. The evolved gas composition was identified as CI2 and HCI by TG-MS system. Based on the analysis of the experimental results, the mechanism of thermal decomposition of CeCl3·7 H2 O was proposed with completion of the dehydration reaction at 224 ℃,the hydrolysis reaction at 170-480 ℃,and the oxidation reaction of CeCl3 above 480 ℃.
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