Mao Jiang-hua, Li Yu-ping, Li Hui-quan
2007
Citations
0
Influential Citations
5
Citations
Journal
The Chinese Journal of Process Engineering
Abstract
1-Ethyl-3-methylimidazolium hydrogen sulfate([EMIM]HSO4) was synthesized with N-methylimidazolium as raw material and characterized by using FT-IR and TG-DTG-DTA and DSC measurements.Some physical properties concerned in aluminum electrolysis,such as density,surface tension,electrical conductivity and viscosity of [EMIM]HSO4,were investigated.The solubility and electrochemical behavior of alumina in [EMIM]HSO4 was studied by using inductively coupled plasma-atomic emission spectrometer(ICP-AES) and cyclic voltammmetry measurements.The results showed that [EMIM]HSO4 was very stable at the temperatures below 270 ℃,its density and viscosity decreased rapidly with increase of temperature,and molar conductivity reached 2.890 S-cm2/mol at 100℃,demonstrating that [EMIM]HSO4 could be used as electrolyte.The solubility of alumina in [EMIM]HSO4 at 20℃ was 3.81 g/L,suggesting that this system might satisfy the electrolysis of alumina,alumina could be reduced to aluminum at a platinum electrode,with normal deposition at-0.54 V and under potential deposition(UPD) at-0.26 V,and the deposition was a diffusion-controlled process.