Abstract: A dimeric ionic liquid that enhances and improves the performance and durability of a fuel cell catalyst. The dimeric ionic liquid comprises 1,1-(butane-1, 4-diyl)bis(9-methyl-3,4,6,7,8,9-hexahydro-2H-pyrimido[1,2-a]pyrimidin-1-ium 1,1,2,2,3,3,4,4,4-nonafluorobutane-1-sulfonate. Membrane electrode assemblies (MEAs) and polymer electrolyte membrane fuel cells (PEMFCs) employing the dimeric ionic liquid are also disclosed.

Abstract: A protonated dimeric ionic liquid that enhances and improves the performance of a fuel cell catalyst. The protonated dimeric ionic liquid comprises 9?9?-(butane-1,4-diyl)bis(3,4,6,7,8,9-hexahydro-2H-pyrimido[1,2-a]pyrimidin-1-ium) 1,1,2,2,3,3,4,4,4-nonafluorobutane-1-sulfonate. Membrane electrode assemblies (MEAs) and polymer electrolyte membrane fuel cells (PEMFCs) employing the protonated dimeric ionic liquid are also disclosed.

Abstract: A protonated dimeric ionic liquid that enhances and improves the performance of a fuel cell catalyst. The protonated dimeric ionic liquid comprises 9?9?-(butane-1, 4-diyl)bis(3,4,6,7,8,9-hexahydro-2H-pyrimido[1,2-a]pyrimidin-1-ium) 1,1,2,2,3,3,4,4,4-nonafluorobutane-1-sulfonate (HTBD) Membrane electrode assemblies (MEAs) and polymer electrolyte membrane fuel cells (PEMFCs) employing the protonated dimeric ionic liquid are also disclosed.

Abstract: A dimeric ionic liquid that enhances and improves the performance and durability of a fuel cell catalyst. The dimeric ionic liquid comprises 1,1-(butane-1,4-diyl)bis(9-methyl-3,4,6,7,8,9-hexahydro-2H-pyrimido[1,2-a]pyrimidin-1-ium 1,1,2,2,3,3,4,4,4-nonafluorobutane-1-sulfonate (D-[MTBD][C4F9SO3]). Membrane electrode assemblies (MEAs) and polymer electrolyte membrane fuel cells (PEMFCs) employing the dimeric ionic liquid are also disclosed.

Abstract: The present disclosure pertains to methods and systems for separating olefins from a mixture that includes olefins and non-olefins. The methods include associating the mixture with a support that is embedded with an ionic liquid and a metal ion. The ionic liquid prevents the substantial reduction of the metal ion by reducing agents while the metal ion mediates the transport of the olefin through the support by selectively and reversibly coupling with the olefin. In some embodiments, the support may be in the form of supported ionic liquid porous membranes, and the ionic liquid may be held within the pores of the support by capillary forces. In some embodiments, the support may be in the form of a composite, and the ionic liquid may be dispersed throughout the composite. In some embodiments, the metal ion may be dissolved in the ionic liquid and dispersed throughout the support.

Abstract: The present disclosure pertains to methods and systems for separating olefins from a mixture that includes olefins and non-olefins. The methods include associating the mixture with a support that is embedded with an ionic liquid and a metal ion. The ionic liquid prevents the substantial reduction of the metal ion by reducing agents while the metal ion mediates the transport of the olefin through the support by selectively and reversibly coupling with the olefin. In some embodiments, the support may be in the form of supported ionic liquid porous membranes, and the ionic liquid may be held within the pores of the support by capillary forces. In some embodiments, the support may be in the form of a composite, and the ionic liquid may be dispersed throughout the composite. In some embodiments, the metal ion may be dissolved in the ionic liquid and dispersed throughout the support.

Abstract: Some embodiments described herein relate to ionic liquids comprising an anion of a heteraromatic compound such as optionally substituted pyrrolide, optionally substituted pyrazolide, optionally substituted indolide, optionally substituted phospholide, or optionally substituted imidazolide. Methods and devices for gas separation or gas absorption related to these ionic liquids are also described herein.

Abstract: Disclosed herein are ionic liquid compounds, complexes and compositions suitable for use as refrigerants. Methods and systems for heating and/or cooling, including vapor compression heating or cooling systems, including such refrigerants are also disclosed. Preferred ionic liquids include those having anions selected from pyrrolide, pyrazolide, triazolide, imidazolide, benzimidazolide, and indolide, and cations selected from phosphonium, ammonium, pyrrolidinium, imidazolium, and pyridinium.

Abstract: Some embodiments described herein relate to ionic liquids comprising an anion of a heteraromatic compound such as optionally substituted pyrrolide, optionally substituted pyrazolide, optionally substituted indolide, optionally substituted phospholide, or optionally substituted imidazolide. Methods and devices for gas separation or gas absorption related to these ionic liquids are also described herein.

Abstract: Some embodiments described herein relate to ionic liquids comprising an anion of a heteraromatic compound such as optionally substituted pyrrolide, optionally substituted pyrazolide, optionally substituted indolide, optionally substituted phospholide, or optionally substituted imidazolide. Methods and devices for gas separation or gas absorption related to these ionic liquids are also described herein.

Abstract: Disclosed herein are methods for CO2 capture that use phase change ionic liquids (PCILs) to remove the CO2 from flue gas or other gas streams containing CO2. PCILs have high CO2 uptake and form a liquid PCIL-CO2 complex when they react with C( )2. When the liquid PCIL-CO2 complex is heated to regenerate the solid PCIL material by removing the carbon dioxide, part of the heat needed to release the CO2 can be supplied by the heat of fusion of the PCIL as it solidifies. Utilization of the heat of fusion of the PCIL to assist in its own regeneration can substantially reduce the parasitic energy loss associated with post-combustion CO2 capture.

Abstract: Some embodiments described herein relate to ionic liquids comprising an anion of a heteraromatic compound such as optionally substituted pyrrolide, optionally substituted pyrazolide, optionally substituted indolide, optionally substituted phospholide, or optionally substituted imidazolide. Methods and devices for gas separation or gas absorption related to these ionic liquids are also described herein.

Abstract: Some embodiments described herein relate to ionic liquids comprising an anion of a heteraromatic compound such as optionally substituted pyrrolide, optionally substituted pyrazolide, optionally substituted indolide, optionally substituted phospholide, or optionally substituted imidazolide. Methods and devices for gas separation or gas absorption related to these ionic liquids are also described herein.

Abstract: The viscosity of various ionic liquids (IL), the solvent tetraethylene glycol dimethyl ether (G4), and their mixtures, with or without lithium salts, were measured experimentally. Various compositions were studied spectroscopically. Detailed analysis reveals that G4 preferentially solvates cations, leading to a reduction in the interaction energy between cations and anions and a subsequent enhancement in anion mobility. Diffusivity and ionic conductivity of certain compositions were improved at G4 mole fractions below levels required for a “solvate ionic liquid”. When an IL was combined with low amounts of a 1:1 stoichiometric ratio of G4 and lithium salt, the viscosity of composition remained constant and ion mobility increased.

Abstract: Disclosed herein are methods for C2 capture that use phase change ionic liquids (PCILs) to remove the C02 from flue gas or other gas streams containing C02. PCILs have high C02 uptake and form a liquid PCIL- C02 complex when they react with C( )2. When the liquid PCIL- C02 complex is heated to regenerate the solid PCIL material by removing the carbon dioxide, part of the heat needed to release the C02 can be supplied by the heat of fusion of the PCIL as it solidifies. Utilization of the heat of fusion of the PCIL to assist in its own regeneration can substantially reduce the parasitic energy loss associated with post-combustion C02 capture.

Abstract: Disclosed herein are ionic liquid compounds, complexes and compositions suitable for use as refrigerants. Methods and systems for heating and/or cooling, including vapor compression heating or cooling systems, including such refrigerants are also disclosed. Preferred ionic liquids include those having anions selected from pyrrolide, pyrazolide, triazolide, imidazolide, benzimidazolide, and indolide, and cations selected from phosphonium, ammonium, pyrrolidinium, imidazolium, and pyridinium.

Abstract: Described herein are compounds, compositions, and methods for enhancing oil recovery.

Abstract: Some embodiments described herein relate to ionic liquids comprising an anion of a heteraromatic compound such as optionally substituted pyrrolide, optionally substituted pyrazolide, optionally substituted indolide, optionally substituted phospholide, or optionally substituted imidazolide. Methods and devices for gas separation or gas absorption related to these ionic liquids are also described herein.

Abstract: Disclosed herein are aminopyridinium cations and compositions containing these cations. Piperidino pyridinium cations and compositions containing these cations are also described. Ionic compositions, particularly liquid ionic compositions that contain the aminopyridinium cation or piperidino pyridinium cation are also described. Methods of enhancing the thermal stability of a compound, particularly an ionic compound, using the aminopyridinium or piperidino pyridinium cations, are also presented. Compositions having an expanded liquidus range of from about ?73° C. to about 444° C. are also described. Solvents, heat transfer fluids, and lubricants having improved thermal stability characteristics and an expanded and improved liquidus range are also disclosed.

Abstract: The present invention provides a method for purifying a gas by contacting the gas with a liquid ionic compound. Natural gas may be purified, removing water and carbon dioxide, by contacting the natural gas with a liquid ionic compound.