Effect of ionic liquids with imidazolium based cations substituted by different oxygen-containing groups on coal oxidation
Abstract：Aiming to study the inhibiting oxidation effect of ionic liquid （IL） on coal, this study used two ionic liquids with imidazolium based cations substituted by different oxygen-containing groups, [ AOEmim ] BF4 and [ HOEmim ] BF4, to dissolve coal. The dissolving ability of the two ionic liquids for functional group in coal was studied by In-Situ Fourier Transform Infrared Spectroscopy （In-Situ FTIR）. The results show that the ionic liquid can dissolve coal and react with coal by complexion formation and create earboxyl. According to the thermo analysis experiment results, the [ AOEmim] BF4-pretrreated coal releases heat more quickly than the [ HOEmim ~ BF4 -pretreated coal does before 250 ℃. After 250 ℃, the exothermic rates of the two pretreated coal samples both reduce sharply. The exothermie rate of[ HOEmim] BF4 pretreated coal reduces more earlier than that of[ AOEmim] BF4 pretreated one. Synthesizing the FTIR and DSC results,the mechanism of interaction between the [ HOEmim] BF4 and coal was analyzed.
Keywords：ionic liquiddissolutionfunctional groups of coalexothermic ratemechanism
Publication Date：2012-07-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 1190-1194 )