Physico-chemical properties of ionic liquids: Density, viscosity, density at high pressure, surface tension, octan-1-ol/water partition coefficients and thermodynamic models

This paper deals with the physico-chemical properties of ethanol and ethanol-water solutions. The data of ethanol properties and its water solutions, which were obtained from literature, are presented in the form of Equations and Tables.Extended properties include data for pure ethanol (density, vapor pressure, surface tension, viscosity, molar and specific heat capacity, enthalpy of evaporation, thermal conductivity and static relative permittivity) and tabled data for ethanol-water solutions (0–100% ethanol) as well: concentrative properties, surface tension and thermal conductivity at20 °C, density, viscosity, boiling point and equilibrium liquid-vapor at normal pressure.

Download Full-text

15N NMR studies provide insights into physico-chemical properties of room-temperature ionic liquids

Physical Chemistry Chemical Physics ◽

10.1039/d1cp01492g ◽

2021 ◽

Author(s):

Christoph Wiedemann ◽

David Fushman ◽

Frank Bordusa

Keyword(s):

Ionic Liquids ◽

Room Temperature ◽

Chemical Properties ◽

Room Temperature Ionic Liquids ◽

15N Nmr ◽

Nmr Studies ◽

Physico Chemical ◽

Alternative Solvents

Ionic liquids (ILs) have gained a lot of attention as alternative solvents in many fields of science in the last two decades. It is known that the type of anion...

Download Full-text

Ionic Liquids in Analytical Chemistry: Applications and Recent Trends

Current Analytical Chemistry ◽

10.2174/1573411017666210331113712 ◽

2021 ◽

Vol 17 ◽

Author(s):

Giuseppe Maria Merone ◽

Angela Tartaglia ◽

Enrica Rosato ◽

Cristian D’Ovidio ◽

Abuzar Kabir ◽

...

Keyword(s):

Analytical Chemistry ◽

Ionic Liquids ◽

Stationary Phases ◽

Extraction Procedure ◽

Chemical Properties ◽

Electrochemical Analysis ◽

Physico Chemical ◽

Recent Trends ◽

Number Of Publications ◽

Physical And Chemical

Background: Ionic liquids (ILs) are a unique class of compounds consisting exclusively of cations and anions that possess distinctive properties such as low volatility, high thermal stability, miscibility with water and organic solvents, electrolytic conductivity and non-flammability. Ionic liquids have been defined as "design solvents", because it is possible to modify their physical and chemical properties by appropriately choosing cations and anions, in order to meet the specific characteristics based on their potential application. Introduction: Due of their tunable nature and properties, ILs are considered as the perfect candidates for numerous applications in analytical chemistry including sample preparation, stationary phases in liquid or gas chromatography, additives in capillary electrophoresis, or in mass spectrometry for spectral and electrochemical analysis. In the last years, the number of publications regarding ILs has rapidly increased, highlighting the broad applications of these compounds in various fields of analytical chemistry. Results: This review first described the main physico-chemical characteristics of ionic liquids, and subsequently reported the various applications in different subdisciplines of analytical chemistry, including the extraction procedure and separation techniques. Furthermore, in each paragraph the most recent applications of ionic liquids in the food, environmental, biological, etc. fields have been described. Conclusion: Overall, the topic discussed highlights the key role of ionic liquids in analytical chemistry, giving hints for their future applications in chemistry but also in biology and medicine.

Download Full-text

ChemInform Abstract: Physico-Chemical Properties of Task-Specific Ionic Liquids

ChemInform ◽

10.1002/chin.201331265 ◽

2013 ◽

Vol 44 (31) ◽

pp. no-no

Author(s):

Luis C. Branco ◽

Goncalo V. S. M. Carrera ◽

Joao Aires-de-Sousa ◽

Ignacio Lopez Martin ◽

Raquel Frade ◽

...

Keyword(s):

Ionic Liquids ◽

Chemical Properties ◽

Physico Chemical

Download Full-text

Research on Physico-Chemical Properties of Diethyl Ether/Linseed Oil Blends for the Use as Fuel in Diesel Engines

Energies ◽

10.3390/en13246564 ◽

2020 ◽

Vol 13 (24) ◽

pp. 6564

Author(s):

Krzysztof Górski ◽

Ruslans Smigins ◽

Rafał Longwic

Keyword(s):

Surface Tension ◽

Low Temperature ◽

Diethyl Ether ◽

Diesel Fuel ◽

Diesel Engines ◽

Kinematic Viscosity ◽

Linseed Oil ◽

Chemical Properties ◽

Fuel Blends ◽

Physico Chemical

Physico-chemical properties of diethyl ether/linseed oil (DEE/LO) fuel blends were empirically tested in this article for the first time. In particular, kinematic viscosity (ν), density (ρ), lower heating value (LHV), cold filter plugging point (CFPP) and surface tension (σ) were examined. For this research diethyl ether (DEE) was blended with linseed oil (LO) in volumetric ratios of 10%, 20% and 30%. Obtained results were compared with literature data of diethyl ether/rapeseed oil (DEE/RO) fuel blends get in previous research in such a way looking on differences also between oil types. It was found that DEE impacts significantly on the reduction of plant oil viscosity, density and surface tension and improve low temperature properties of tested oils. In particular, the addition of 10% DEE to LO effectively reduces its kinematic viscosity by 53% and even by 82% for the blend containing 30% DEE. Tested ether reduces density and surface tension of LO up to 6% and 25% respectively for the blends containing 30% DEE. The measurements of the CFPP showed that DEE significantly improves the low temperature properties of LO. In the case of the blend containing 30% DEE the CFPP can be lowered up to −24 °C. For this reason DEE/LO blends seem to be valuable as a fuel for diesel engines in the coldest season of the year. Moreover, DEE/LO blends have been tested in the engine research. Based on results it can be stated that the engine operated with LO results in worse performance compared with regular diesel fuel (DF). However, it was found that these disadvantages could be reduced with DEE as a component of the fuel mixture. Addition of this ether to LO improves the quality of obtained fuel blends. For this reason, the efficiency of DEE/LO blend combustion process is similar for the engine fuelled with regular diesel fuel. In this research it was confirmed that the smoke opacity reaches the highest value for the engine fuelled with plant oils. However, addition of 20% DEE reduces this emission to the value comparable for the engine operated with diesel fuel.

Download Full-text

ChemInform Abstract: Physico-Chemical Properties and Phase Behavior of Piperidinium-Based Ionic Liquids

ChemInform ◽

10.1002/chin.201224238 ◽

2012 ◽

Vol 43 (24) ◽

pp. no-no

Author(s):

Urszula Domanska ◽

Marta Krolikowska ◽

Kamil Paduszynski

Keyword(s):

Ionic Liquids ◽

Phase Behavior ◽

Chemical Properties ◽

Physico Chemical

Download Full-text

Partitioning of unsubstituted Polycyclic Aromatic Hydrocarbons between surface sediments and the water column in the Brisbane River Estuary

Marine and Freshwater Research ◽

10.1071/mf9900443 ◽

1990 ◽

Vol 41 (4) ◽

pp. 443 ◽

Cited By ~ 20

Author(s):

SI Kayal ◽

DW Connell

Keyword(s):

Polycyclic Aromatic Hydrocarbons ◽

Water Column ◽

Aromatic Hydrocarbons ◽

Partition Coefficients ◽

Laboratory Experiments ◽

River Estuary ◽

Chemical Properties ◽

Linear Relationships ◽

Physico Chemical ◽

Polycyclic Aromatic

In all, 23 sediment samples and 8 water column samples from the Brisbane River estuary, Queensland, Australia, were analysed for polycyclic aromatic hydrocarbons (PAHs) in order to assess the field partitioning behaviour of these hydrocarbons. Twelve PAHs, ranging in molecular weight from naphthalene to benzo[a]pyrene, were identified and quantified. Their partition coefficients, indexed to sediment organic carbon and lipid content, were calculated after filtering to remove particulates and making a calculated adjustment for colloids, or organic matter, in the water phase. In logarithmic form, the partition coefficients were related to the physico-chemical properties of the compounds (Kow, Sw, RRT) by relationships having a parabolic shape rather than being linear. However, compounds with log Kow values of less than 5.5 gave linear relationships comparable to, but distinctly different from, those obtained from laboratory experiments. It is suggested that field conditions have distinctive differences from laboratory experiments that do not allow the direct translation of laboratory-based relationships to the natural aquatic environment.

Download Full-text

Viscosity models for ionic liquids and their mixtures

Physical Chemistry Chemical Physics ◽

10.1039/d0cp05787h ◽

2020 ◽

Author(s):

Anya Fettouma Bouarab ◽

Jean-Philippe Harvey ◽

Christian Robelin

Keyword(s):

Ionic Liquids ◽

Process Optimization ◽

Chemical Properties ◽

Viscosity Models ◽

Physico Chemical

As the field of ionic liquids matures to more industrially implemented applications, robust models of their physico-chemical properties become necessary for process optimization. Viscosity is a particularly difficult property to...

Download Full-text