Mixed matrix membranes (mmms) comprising organic polymers with dispersed inorganic fillers for gas separation

https://www.massey.ac.nz/%7Eychisti/Lipases.pdf

Production, purification, characterization, and applications of lipases.

A framework for better understanding membrane distillation separation process

Membranes and theoretical modeling of membrane distillation: a review.

Pushing the limits on possibilities for large scale gas separation: which strategies?

Ionic liquids can be used as solvents for gas absorption operations in order to improve the process economy and general efficiency of gas separations. This work investigates solvent properties of ionic liquids and compares them to amine solutions used for absorption of carbon dioxide (CO2). The CO2 solubility into six different room temperature ionic liquids (RTILs) was measured at temperatures between 298 K and 343 K and pressures up to about 1 MPa. The RTILs used were: [bmim]+[BF4]−, [bmim]+[DCA]−, and four imidazolium-based ionic liquids paired with [DCA] and [BF4], in which the cation was functionalized with either a primary, tertiary amine or a hydroxyl group. The density, viscosity and surface tension of the studied RTILs were measured at temperatures ranging from 293 K up to 363 K. The results showed that CO2 absorption behaviour was influenced by the functionalized chains appended to the RTILs cation. A chemical enhancement of the CO2 absorption was observed when functionalized RTILs were used as absorption solvents. It was possible to increase the ionic liquid volumetric gas load almost threefold by attaching functional groups to the ionic liquid, whereas for the traditional amine solutions the maximum gas load is stoichiometrically limited.

Solvent properties of functionalized ionic liquids for CO2 absorption

Desalination and water recycling by air gap membrane distillation

Experimental densities, dynamic viscosities and surface tensions of the ionic liquids series 1-ethyl-3-methylimidazolium acetate and dicyanamide and their binary and ternary mixtures with water and ethanol at T = (298.15 to 343.15 K)

Presently, there are no processes available to separate low concentration ( Extraction with sulfolane will result in a negative margin of €10 million per year. Therefore, a conceptual process for the extraction of aromatic hydrocarbons with the ionic liquid 4-methyl-N-butylpyridinium tetrafluoroborate was developed using ASPEN. The investment costs are estimated to be €56 million and the annual costs about €28 million per year, resulting in a positive margin of about €20 million per year.

/pdf/conceptual-process-design-for-aromatic-aliphatic-separation-2betc0zgk0.pdf

Conceptual process design for aromatic/aliphatic separation with ionic liquids

This research focused on a study of the ionic liquid 4-methyl-N-butylpyridinium tetrafluoroborate ([mebupy]BF4) as a solvent in liquid−liquid extraction. Liquid−liquid equilibrium data were obtained for mixtures of 4-methyl-N-butylpyridinium tetrafluoroborate + (benzene or ethylbenzene or m-xylene) + (N-hexane or N-octane) at T = (313.2 and 348.2) K and T = (313.2 and 333.2) K for the ternary mixture with benzene and p = 0.1 MPa. The experimental data for the binary and ternary systems were well-correlated with the NRTL model. The aromatic/aliphatic selectivity values were comparable to those of toluene + N-heptane. The ionic liquid [mebupy]BF4 is therefore a suitable solvent for an industrial extraction process for the separation of aromatic and aliphatic hydrocarbons.

G.W. Meindersma

Papers

Solvent properties of functionalized ionic liquids for CO2 absorption

Desalination and water recycling by air gap membrane distillation

Experimental densities, dynamic viscosities and surface tensions of the ionic liquids series 1-ethyl-3-methylimidazolium acetate and dicyanamide and their binary and ternary mixtures with water and ethanol at T = (298.15 to 343.15 K)

Conceptual process design for aromatic/aliphatic separation with ionic liquids

Ternary liquid-liquid equilibria for mixtures of an aromatic + an aliphatic hydrocarbon + 4-methyl-N-butylpyridinium tetrafluoroborate