Density and Viscosity Estimation of 1-hexyl-3-methyl Imidazolium Based Ionic Liquids with [BF4] and [PF6] Anions at High Pressures

2011 ◽  
Vol 11 (13) ◽  
pp. 2452-2455 ◽  
Author(s):  
A. Muhammad ◽  
M.I. Abdul Mutalib ◽  
T. Murugesan ◽  
Z. Man ◽  
A. Bustam
Keyword(s):  
Ionic Liquids ◽  
High Pressures

Conformational preferences of two imidazolium-based ionic liquids at high pressures

2011 ◽  
Vol 511 (4-6) ◽  
pp. 241-246 ◽  
Author(s):  
Takahiro Takekiyo ◽  
Yusuke Imai ◽  
Naohiro Hatano ◽  
Hiroshi Abe ◽  
Yukihiro Yoshimura
Keyword(s):  
Ionic Liquids ◽  
High Pressures ◽  
Conformational Preferences

scholarly journals Towards the Equation of State for Neutral (C2H4), Polar (H2O), and Ionic ([bmim][BF4], [bmim][PF6], [pmmim][Tf2N]) Liquids

2014 ◽  
Vol 2014 ◽  
pp. 1-15 ◽  
Author(s):  
Vitaly B. Rogankov ◽  
Valeriy I. Levchenko
Keyword(s):  
Experimental Data ◽  
Ionic Liquids ◽  
Equation Of State ◽  
High Pressures ◽  
Strong Dependence ◽  
Fluid Equation ◽  
Lattice Fluid ◽  
Wide Range ◽  
Derived Properties ◽  
Vapor Liquid

Despite considerable effort of experimentalists no reliable vapor-liquid coexistence at very small pressures and liquid-solid coexistence at high pressures have been until now observed in the working range of temperature 290<T/K<350 for ionic liquids. The measurements of high-pressure properties in low-temperature stable liquid are relatively scarce while the strong influence of their consistency on the phase equilibrium prediction is obvious. In this work we discuss the applicability of fluctuational-thermodynamic methodology and respective equation of state to correlate the properties of any (neutral, polar, ionic) liquids since our ultimate goal is the simple reference predictive model to describe vapor-liquid, liquid-liquid, and liquid-solid equilibria of mixtures containing above components. It is shown that the inconsistencies among existing volumetric measurements and the strong dependence of the mechanical and, especially, caloric derived properties on the shape of the functions chosen to fit the experimental data can be resolved in the framework of fluctuational-thermodynamic equation of state. To illustrate its results the comparison with the known experimental data for [bmim][BF4] and [bmim][PF6] as well as with the lattice-fluid equation of state and the methodology of thermodynamic integration is represented. It corroborates the thermodynamic consistency of predictions and excellent correlation of derived properties over the wide range of pressures 0<P/MPa<200.

Densities and Derived Volumetric Properties of Ionic Liquids with [Nf2] and [NTf2] Anions at High Pressures

2018 ◽  
Vol 63 (4) ◽  
pp. 954-964 ◽  
Author(s):  
Olalla G. Sas ◽  
Gorica R. Ivaniš ◽  
Mirjana Lj. Kijevčanin ◽  
Begoña González ◽  
Angeles Domínguez ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
High Pressures ◽  
Volumetric Properties

Solubility of CO2 in Binary Mixtures of Room-Temperature Ionic Liquids at High Pressures

2012 ◽  
Vol 57 (8) ◽  
pp. 2153-2159 ◽  
Author(s):  
Zhigang Lei ◽  
Jingli Han ◽  
Benfeng Zhang ◽  
Qunsheng Li ◽  
Jiqin Zhu ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Binary Mixtures ◽  
Room Temperature ◽  
High Pressures ◽  
Room Temperature Ionic Liquids

scholarly journals Local structures of ionic liquids in the presence of gold under high pressures

AIP Advances ◽  
2013 ◽  
Vol 3 (3) ◽  
pp. 032147 ◽  
Author(s):  
Hai-Chou Chang ◽  
Tzu-Chieh Hung ◽  
Hsing-Sheng Wang ◽  
Tsai-Yi Chen
Keyword(s):  
Ionic Liquids ◽  
High Pressures ◽  
Local Structures

scholarly journals Utilizing Infrared Spectroscopy to Analyze the Interfacial Structures of Ionic Liquids/Al2O3 and Ionic Liquids/Mica Mixtures under High Pressures

Nanomaterials ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 373 ◽  
Author(s):  
Yen-Hsu Chang ◽  
Hai-Chou Chang ◽  
Yen-Pei Fu
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Infrared Spectroscopy ◽  
Local Structure ◽  
High Pressures ◽  
Ambient Pressure ◽  
Solid Particles ◽  
Solid Surfaces ◽  
Methyl Sulfate ◽  
Interfacial Interactions

The interfacial interactions between ionic liquids (1,3-dimethylimidazolium methyl sulfate and 1-ethyl-3-methylimidazolium trifluoromethanesulfonate) and solid surfaces (mesoporous aluminum oxide and mica) have been studied by infrared spectroscopy at high pressures (up to 2.5 GPa). Under ambient pressure, the spectroscopic features of pure ionic liquids and mixtures of ionic liquids/solid particles (Al2O3 and mica) are similar. As the pressure is increased, the cooperative effect in the local structure of pure 1,3-dimethylimidazolium methyl sulfate becomes significantly enhanced as the imidazolium C–H absorptions of the ionic liquid are red-shifted. However, this pressure-enhanced effect is reduced by adding the solid particles (Al2O3 and mica) to 1,3-dimethylimidazolium methyl sulfate. Although high-pressure IR can detect the interactions between 1,3-dimethylimidazolium methyl sulfate and particle surfaces, the difference in the interfacial interactions in the mixtures of Al2O3 and mica is not clear. By changing the type of ionic liquid to 1-ethyl-3-methylimidazolium trifluoromethanesulfonate, the interfacial interactions become more sensitive to the type of solid surfaces. The mica particles in the mixture perturb the local structure of 1-ethyl-3-methylimidazolium trifluoromethanesulfonate under high pressures, forcing 1-ethyl-3-methylimidazolium trifluoromethanesulfonate to form into an isolated structure. For Al2O3, 1-ethyl-3-methylimidazolium trifluoromethanesulfonate tends to form an associated structure under high pressures.

Sequestration of light hydrocarbons in Ionic Liquids at high-pressures: Consistency and thermodynamic modeling

2021 ◽  
pp. 113119
Author(s):  
Pedro F. Arce ◽  
Edson M. Igarashi ◽  
Nian V. Freire ◽  
Dreidy M. Vásquez ◽  
Pedro A. Robles
Keyword(s):  
Ionic Liquids ◽  
Thermodynamic Modeling ◽  
High Pressures ◽  
Light Hydrocarbons
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