Abstract
The thermal decomposition of NiSO4·6H2O, NiCl2·6H2O, and Ni(SO3NH2)2·xH2O was investigated in 50–1200 °C range by simultaneous thermogravimetry (TG) and differential scanning calorimetry (DSC) in flowing air. The solid products of the decomposed salts were identified by X-ray diffraction (XRD) analysis. The nickel salt hydrates first dehydrate in 100–350 °C, followed by decomposition into nickel oxide and gaseous species. The decomposition temperatures of the anhydrous NiSO4, NiCl2, and Ni(SO3NH2)2 are, respectively, 810 °C, 740 °C, 375–797 °C. The enthalpies for decomposition of the anhydrous salts, determined from the DSC curve, are 93.50 kJ·mol−1, 14.55 kJ·mol−1, and 26.67–56.15 kJ·mol−1for NiSO4, NiCl2, and Ni(SO3NH2)2, respectively.
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Support from the NASA Alabama Space Grant Consortium (ASGC) (Grant Number: NNX15AJ18H) for conducting the research is gratefully acknowledged.
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King, M.K., Mahapatra, M.K. Thermal Decomposition of Nickel Salt Hydrates. Int J Thermophys 43, 32 (2022). https://doi.org/10.1007/s10765-021-02960-4
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DOI: https://doi.org/10.1007/s10765-021-02960-4