Influence of FeCl3 on radiation stability of ionic liquid BmimCl

Abstract

This study investigates the effect FeCl 3 on the radiation stability of the ionic liquid, 1-butyl-3-methylimidazolium chloride (BmimCl) over a wide dose range of 0 to 1000 kGy under γ-ray radiation. The ionic liquid species, BmimFeCl 4 , was formed by adding FeCl 3 into BmimCl. The results showed that the presence of FeCl 4 − significantly improved the radiation resistance of BmimCl, wherein the effect was more pronounced at higher FeCl 4 − content. Meanwhile, under irradiation, Fe(II) was generated from Fe(III), which was reduced by solvated electron. In addition, the concentration of Fe(II) increased with low level of absorbed dose, but leveled off at higher doses. Moreover, the radiation yield of the solvated electrons of BmimCl was further estimated at approximately 0.358±0.01 μmol/J in BmimCl-7 mol% FeCl 3 system. radiation, ionic liquid, FeCl 3 , BmimFeCl 4 , solvated electron Citation:

Experimental investigations on the regeneration of desulfurized 1‐butyl‐3‐methylimidazolium tetrachloroferrate [Bmim][FeCl4] and 1‐butyl‐3‐methylimidazolium thiocyanate [Bmim][SCN] ionic liquids: A raman spectroscopic study

“…This initial loss in weight of the [Bmim][FeCl 4 ] sample can be directed to the evaporation of the trapped water molecules present in the [Bmim][FeCl 4 ], which were absorbed from the atmosphere during the experimentation. With an increase in the TGA temperature, another two significant peaks can be identified in [Bmim][FeCl 4 ] TGA curves at a temperature within the range of 285.2°C and 426.8°C, which can be directed to the approximately 78.2% and 15.3% loss in the weight of the [Bmim][FeCl 4 ] due to the decomposition of the major structure of the [Bmim][FeCl 4 ], respectively . Additionally, the peak that appeared within the range of the 41.9°C can be directed to the removal of water of the crystallization from the sample, that is, [Bmim][FeCl 4 ].…”

“…[62,63] (Figure 4), the TGA analysis revealed that initially, the significant weight loss of the ionic liquid [Bmim] [FeCl 4 ] was identified at a temperature within the range of 43.8°C with loss in weight of approximately 7.8%. [65] [66] Additionally, the peak that appeared within the range of the 41.9°C can be directed to the removal of water of the crystallization from the sample, that is, [Bmim] [FeCl 4 ]. Furthermore, in addition to the above-mentioned peaks, another significant loss in weight can be identified with a peak that appeared within the temperature range of the 400.2°C, which can be directed to the thermal decomposition of the metal-based anion, that is, [FeCl 4 ] − into the ionic liquid sample, that is, [Bmim] [FeCl 4 ].…”

Understanding the Photoexcitation of Room Temperature Ionic Liquids

“…An aspect of radiation stability was published by Huang et al [24] . Although RTILs can be damaged by radiation emission, addition of FeCl 3 to an imidazolium chloride scavenges solvated electrons and makes RTILs more stable against radiation interaction.…”

“…[22,23] A subsequent detrapping can lead to an inhomogeneous bleaching in the spectral region revealing heterogeneity in RTILs. [23] An aspect of radiation stability was published by Huang et al [24] Although RTILs can be damaged by radiation emission, addition of FeCl 3 to an imidazolium chloride scavenges solvated electrons and makes RTILs more stable against radiation interaction. In general, formation of molecular hydrogen in RTILs is a good indicator to judge solvent stability after γ-ray and heavy ion irradiations.…”

Upgrading and Viscosity Reduction of Heavy Oil by Catalytic Ionic Liquid

“…Fan et al and Nares et al worked on upgrading heavy oil with ionic liquids and illustrated that they can improve heavy oil quality. Also, ionic liquids are used widely in the extraction and removal of sulfur because of their catalytic activity and efficiency of solubility over a wide temperature range. , The observed significant reduction of viscosity and asphaltene content when heavy crude oil is treated with ionic liquids at lower temperature has drawn attention because of their potential application as an environmentally friendly and catalytically active solvent compared with other alternatives for the same process, such as the aquathermolysis method. The aquathermolysis method is the most efficient way to decrease the viscosity of heavy oil .…”