Effect of Structural Variations on the Thermophysical Properties of Protic Ionic Liquids: Insights from Experimental and Computational Studies

2017 ◽  
Vol 62 (10) ◽  
pp. 2993-3003 ◽  
Author(s):  
Amir Sada Khan ◽  
Zakaria Man ◽  
Mohamad Azmi Bustam ◽  
Girma Gonfa ◽  
Fai Kait Chong ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Thermophysical Properties ◽  
Computational Studies ◽  
Structural Variations ◽  
Protic Ionic Liquids

scholarly journals Thermophysical Properties and CO2 Absorption of Ammonium-Based Protic Ionic Liquids Containing Acetate and Butyrate Anions

Processes ◽  
2019 ◽  
Vol 7 (11) ◽  
pp. 820 ◽  
Author(s):  
Yunus ◽  
Halim ◽  
Wilfred ◽  
Murugesan ◽  
Lim ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Thermophysical Properties ◽  
Molecular Volume ◽  
Co2 Absorption ◽  
Thermal Coefficient ◽  
Empirical Correlations ◽  
Protic Ionic Liquids ◽  
Thermogravimetric Analyzer ◽  
Density Values ◽  
Thermal Stability Of

Ionic liquids, which are classified as new solvents, have been identified to be potential solvents in the application of CO2 capture. In this work, six ammonium-based protic ionic liquids, containing ethanolammonium [EtOHA], tributylammonium [TBA], bis(2-ethylhexyl)ammonium [BEHA] cations, and acetate [AC] and butyrate [BA] anions, were synthesized and characterized. The thermophysical properties of the ammonium-based protic ionic liquids were measured. Density, , and dynamic viscosity, , were determined at temperatures between 293.15 K and 363.15 K. The density and viscosity values were correlated using empirical correlations and the thermal coefficient expansion, p, and molecular volume, Vm, were estimated using density values. The thermal stability of the ammonium-based protic ionic liquids was investigated using thermogravimetric analyzer (TGA) at a heating rate of 10 C.min‒1. The CO2 absorption of the ammonium-based ionic liquids were measured up to 20 bar at 298.15 K. From the experimental results, [BEHA][BA] had the highest affinity towards CO2 with the mol fraction of CO2 absorbed approaching 0.5 at 20 bar. Generally, ionic liquids with butyrate anions have better CO2 absorption than that of acetate anions while [BEHA] ionic liquids have higher affinity towards CO2 followed by [TBA] and [EtOHA] ionic liquids.

scholarly journals Thermophysical Properties of Newly Synthesized Ammonium-Based Protic Ionic Liquids: Effect of Temperature, Anion and Alkyl Chain Length

Processes ◽  
2020 ◽  
Vol 8 (6) ◽  
pp. 742
Author(s):  
Nur Hidayah Zulaikha Othman Zailani ◽  
Normawati M. Yunus ◽  
Asyraf Hanim Ab Rahim ◽  
Mohamad Azmi Bustam
Keyword(s):  
Refractive Index ◽  
Ionic Liquids ◽  
Melting Point ◽  
Thermophysical Properties ◽  
Dynamic Viscosity ◽  
Alkyl Chain ◽  
Molecular Volume ◽  
Standard Entropy ◽  
Protic Ionic Liquids ◽  
Density Dynamic

Ionic liquids which are often classified as low melting point salts have received significant attention from research groups and industries to be used in a wide range of applications. Many of these applications require thorough knowledge on the thermophysical properties of the ionic liquids before utilizing their full potentials in various fields. In this work, a series of alkylammonium cation and carboxylate anion-based room temperature protic ionic liquids (PILs) were synthesized by varying length of alkyl chain of the cation from diethyl to dibutyl combined with pentanoate, hexanoate and heptanoate anions. These ammonium-based PILs named as diethylammonium pentanoate [DEA][C5], diethylammonium hexanoate [DEA][C6], diethylammonium heptanoate [DEA][C7], dibutylammonium pentanoate [DBA][C5], dibutylammonium hexanoate [DBA][C6] and dibutylammonium heptanoate [DBA][C7] were characterized using Nuclear Magnetic Resonance (NMR) spectroscopy. The thermophysical properties of the PILs namely density, dynamic viscosity and refractive index were measured and analyzed. Density, ρ and dynamic viscosity, η were determined at T = (293.15 to 363.15) K and refractive index, nD was measured at T = (293.15 to 333.15) K. The fitting parameters are proposed for the empirical correlations of density, dynamic viscosity and refractive index. The values of thermal expansion coefficient, αp, molecular volume, Vm, standard entropy, S° and lattice potential energy, Upot also have been calculated by using the specified equations. The thermal decomposition temperature, Td was also determined using a thermogravimetric analyzer (TGA) while the differential scanning calorimetry (DSC) technique provided the glass transition, Tg, melting point, Tm and crystallization, Tc temperatures of the PILs. The experimental results revealed that the dependency of the experimental values namely the ρ, η, nD, and Td on the alkyl chain of the anion, size of the cations and the temperature of measurement.

Effect of anion on thermophysical properties of N , N -diethanolammonium based protic ionic liquids

2017 ◽  
Vol 242 ◽  
pp. 249-254 ◽  
Author(s):  
Anirban Sarkar ◽  
Gyanendra Sharma ◽  
Dharmendra Singh ◽  
Ramesh L. Gardas
Keyword(s):  
Ionic Liquids ◽  
Thermophysical Properties ◽  
Protic Ionic Liquids

Thermophysical Properties and Proton Transport Mechanisms of Trialkylammonium and 1-Alkyl-1H-imidazol-3-ium Protic Ionic Liquids

2012 ◽  
Vol 51 (43) ◽  
pp. 14084-14098 ◽  
Author(s):  
Janice L. Lebga-Nebane ◽  
Simon E. Rock ◽  
Joshua Franclemont ◽  
Dipankar Roy ◽  
Sitaraman Krishnan
Keyword(s):  
Ionic Liquids ◽  
Thermophysical Properties ◽  
Proton Transport ◽  
Transport Mechanisms ◽  
Protic Ionic Liquids

scholarly journals Azepanium based protic ionic liquids: Synthesis, thermophysical properties and COSMO-RS study

2018 ◽  
Vol 264 ◽  
pp. 24-31 ◽  
Author(s):  
Yue Dong ◽  
Syed Nasir Shah ◽  
Matheswaran Pranesh ◽  
Hanna Prokkola ◽  
Johanna Kärkkäinen ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Thermophysical Properties ◽  
Protic Ionic Liquids

Synthesis, thermophysical properties and COSMO-RS study of DBU based protic ionic liquids

2017 ◽  
Vol 105 ◽  
pp. 151-158 ◽  
Author(s):  
Venkatramana Losetty ◽  
Pranesh Matheswaran ◽  
Cecilia Devi Wilfred
Keyword(s):  
Ionic Liquids ◽  
Thermophysical Properties ◽  
Protic Ionic Liquids
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