Isoconversional kinetic analysis applied to five phosphoniumcation-based ionic liquids.

Blanco, D., Bartolomé, M., Ramajo, B., Viesca Rodriguez, J.L., Gonzalez, R. and Hernandez Battez, A., 2017. Isoconversional kinetic analysis applied to five phosphoniumcation-based ionic liquids. Thermochimica Acta, 648 (February), 62 - 74.

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DOI: 10.1016/j.tca.2016.12.014

Abstract

Thermal degradation of five phosphonium cation-based ionic liquids ([P66614][BEHP], [P66614][(iC8)2PO2],[P66614][NTf2], [P44414][DBS] and [P4442][DEP]) was studied using dynamic methodology (25–600◦C at 5,10 and 20◦C/min) in both inert (nitrogen) and reactive (oxygen) atmospheres. In addition, isothermalexperiments (90 min at 200, 225 and 250◦C) were carried out with [P66614][(iC8)2PO2]. Results indicatethat thermal stability is clearly dominated by the coordination ability of the anion, with [P66614][NTf2] out-performing the other ones in both pyrolytic and oxidising conditions. Although the thermal degradationmechanism is affected by atmospheric conditions, the degradation trend remains practically constant.As the dynamic methodology usually overestimates the long-term thermal stability, an isoconversionalmethodology is better for predicting the long-term thermal stability of these ionic liquids in order to beused as base oil or additive in lubricants formulation. Finally, the model-free methodology can predict atlower costs the ILs performance in isothermal conditions.

Item Type:Article
ISSN:1872-762X
Uncontrolled Keywords:Ionic liquids ; Thermogravimetric analysis ; Isoconversional method ; Model-free kinetics
Group:Faculty of Science & Technology
ID Code:26188
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:22 Feb 2017 16:27
Last Modified:22 Feb 2017 16:27

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