期刊
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
卷 124, 期 -, 页码 181-186出版社
INST CHEMICAL ENGINEERS
DOI: 10.1016/j.psep.2019.02.012
关键词
1,3-Dimethylimidazolium nitrate; Isothermal experiment; Onset temperature; Long-term stability; Maximum operating temperature
资金
- Anhui Province Education Department Natural Sciences Key Fund, China [KJ2017A078]
- Anhui University of Science and Technology, China [QN201613]
1,3-Dimethylimidazolium nitrate ([Mmim]NO3), an ionic liquid, is a versatile and novel solvent for the petrochemical industry. Nevertheless, under high temperature conditions or thermal upset scenarios, [Mmim]NO3 can be decomposed in a manner that produces an explosion or other serious safety problems. The aim of this research was to investigate the thermal stability of [Mmim]NO3 by simultaneous thermogravimetric analyzer and high pressure differential scanning calorimetry. Isothermal experiments indicated that [Mmim]NO3 would be decomposed at a temperature substantially lower than the onset temperature. A pseudo-zero-order rate expression was applied to characterize the thermal decomposition kinetics of [Mmim]NO3, and related thermokinetic parameters were further obtained. Moreover, the temperature at which the thermal decomposition of ILs reached 10.0% for a given time of 10.0 h (T-0.1/10h) was defined to assess the long-term thermal stability, which can be used as the maximum operating temperature of [Mmim]NO3. The results of this study may provide relevant processes for safer control based on the thermal hazard assessment of [Mmim]NO3. (C) 2019 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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