Calorimetric behaviors of N2H4 by DSC and superCRC |
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| Institution: | 1. Environmental System course, Graduate School of Frontier Sciences, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan;2. National Institute of Industrial Safety, 1-4-6 Umezono, Kiyose, Tokyo 204-0024, Japan;3. The Chemical Society of Japan, Kagaku-Kaikan (Chemical Hall), 1-5 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8307, Japan;1. School of Chemical Engineering, Sichuan Univerisity, Chengdu 610065, China;2. Adinex NV, Brouwerijstraat 5/3, B 2200 Noorderwijk, Belgium;3. Mechanical Engineering Technology Cluster TC, Campus Groep T, KU Leuven, A. Vesaliusstraat 13, B3000 Leuven, Belgium;4. Department of Mechanical Engineering, KU Leuven, Celestijnenlaan 300A, B3001 Heverlee, Belgium;1. Department of Chemistry, Henan Key Laboratory of Chemical Biology and Organic Chemistry, Key Laboratory of Applied Chemistry of Henan Universities, Zhengzhou University, Zhengzhou 450052, PR China |
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| Abstract: | The objective of this study is to obtain information about the thermal decomposition behaviors of hydrazine (N2H4) caused by metals, using differential scanning calorimeter (DSC) and SuperCRC. The DSC measurements revealed that the exothermic reactions of N2H4 were caused by the reaction conditions such as the type of cells; the TDSC with a gold pan is 485.2 K and that with a glass capillary is 620.5 K. Besides, the activation energy of the thermal decomposition of N2H4, calculated from the Kissinger and Ozawa methods, were found to be about 38±2 kJ mol?1 in the gold pan and 141±8 kJ mol?1 in the glass capillary. Moreover, a heat flow profile was observed with SuperCRC during the mixing of N2H4 and the metal ion solution at 298 K. The maximum heat flow was related to the metal ion oxidative characters. The higher oxidative characters would provide a faster acceleration for the exothermic behavior than the lower oxidative ions. Based on this study, Mn(VII) and Cr(VI) were considered to exhibit strongly oxidative characteristics during mixing with N2H4. |
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