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TGA Decomposition Kinetics of 1-Butyl-2,3-dimethylimidazolium Tetrafluoroborate and the Thermal Effects of Contaminants

Published

Author(s)

D M. Fox, Jeffrey W. Gilman, Hugh C. De Long, Paul C. Trulove

Abstract

Thermal gravimetric analysis (TGA) has been used to determine the kinetics of decomposition for 1-butyl-2,3-dimethylimidazolium tetrafluoroborate (DMBIBF4) and to identify the effects of contaminants on the decomposition temperatures. Data was collected from both isothermal and constant ramp rate programs for the decomposition of DMBIBF4 in N2. The isothermal data was fit to a global kinetic model and the apparent Arrhenius parameters were determined. The constant heating rate data was used to determine the apparent activation energy using the isoconversional method developed by Friedman. The effects of up to 10 mass-% water, NH4BF4, NH4Cl, and DMBICl impuritites on DMBIBF4 decomposition temperatures were investigated. The only contaminant to significantly affect the decomposition was NH4Cl, resulting in some decomposition at the temperatures associated with DMBICl decomposition.
Citation
Journal of Chemical Thermodynamics

Keywords

chloride, decomposition, imidazolium, impurities, kinetics, room temperature ionic liquids, TGA, thermal stability, water

Citation

Fox, D. , Gilman, J. , De Long, H. and Trulove, P. (2021), TGA Decomposition Kinetics of 1-Butyl-2,3-dimethylimidazolium Tetrafluoroborate and the Thermal Effects of Contaminants, Journal of Chemical Thermodynamics (Accessed March 2, 2024)
Created October 12, 2021