scholarly journals On the Selective Transport of Nutrients through Polymer Inclusion Membranes Based on Ionic Liquids

Processes ◽  
2019 ◽  
Vol 7 (8) ◽  
pp. 544 ◽  
Author(s):  
Z. Baicha ◽  
M.J. Salar-García ◽  
V.M. Ortiz-Martínez ◽  
F.J. Hernández-Fernández ◽  
A.P. de los Ríos ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Transport Model ◽  
Separation Processes ◽  
Application Range ◽  
Sodium Hydrogen Phosphate ◽  
Selective Transport ◽  
Mapping Analysis ◽  
Before And After ◽  
Diffusion Solution

In the last few years, the use of ionic liquid-based membranes has gained importance in a wide variety of separation processes due to the unique properties of ionic liquids. The aim of this work is to analyze the transport of nutrients through polymer inclusion membranes based on different concentrations of methyltrioctylammonium chloride, in order to broaden the application range of these kinds of membranes. Calcium chloride (CaCl2) and sodium hydrogen phosphate (Na2HPO4) nutrients were used at the concentration of 1 g·L−1 in the feeding phase. The evolution of the concentration in the receiving phase over time (168 h) was monitored and the experimental data fitted to a diffusion-solution transport model. The results show very low permeation values for CaCl2. By contrast, in the case of Na2HPO4 the permeation values were higher and increase as the amount of ionic liquid in the membrane also increases. The surface of the membranes was characterized before and after being used in the separation process by scanning electron microscopy coupled to energy dispersive X-Ray spectroscopy (SEM–EDX) and elemental mapping analysis. The SEM–EDX images show that the polymer inclusion membranes studied are stable to aqueous solution contacting phases and therefore, they might be used for the selective transport of nutrients in separation processes.

scholarly journals Ionic liquids as an enabling tool to integrate reaction and separation processes

2019 ◽  
Vol 21 (24) ◽  
pp. 6527-6544 ◽  
Author(s):  
Rocio Villa ◽  
Elena Alvarez ◽  
Raul Porcar ◽  
Eduardo Garcia-Verdugo ◽  
Santiago V. Luis ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Microfluidic Devices ◽  
Chemical Processes ◽  
Membrane Reactors ◽  
Separation Processes ◽  
Catalytic Systems

This tutorial review highlights representative examples of ionic liquid (IL)-based (bio)catalytic systems integrating reaction and separation, as a tool for the development of sustainable chemical processes (e.g. IL/scCO2 biphasic reactors, membrane reactors, nanodrop systems, microfluidic devices, supported IL phases, sponge-like ILs, etc.).

Synthesis of Ionic Liquid and its Application in Duabanga Grandiflora Wood Powder as Green Solvent

2010 ◽  
Vol 113-116 ◽  
pp. 407-411 ◽  
Author(s):  
Cheng Chen ◽  
Jian Li
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Dissolution Mechanism ◽  
Wood Powder ◽  
Imidazolium Ionic Liquid ◽  
Imidazolium Chloride ◽  
Chemical Structures ◽  
Before And After ◽  
Naoh Solution ◽  
Ft Ir

In this paper, a kind of imidazolium ionic liquid, 1-butyl-3-methyl imidazolium chloride ( [BMIM]Cl) was synthesized, and the chemical structures of the ionic liquids were characterizaed by FT-IR and NMR. The solubilities of the ionic liquid for duabanga grandiflora powder activated with different modified conditions were studied respectively. Dissolution rate of wood pretreated with about 25% NaOH solution was the best , due to the reduction of the hydrogen bond applied force. The chemical structure and crystal behavior of duabanga grandiflorar powder before and after dissolution were analyzed by FT-IR and XRD, respectively. The dissolution mechanism has also been discussed. The results showed that the ionic liquids had a good solubility for cellulose in activated duabanga grandiflorar powder. Micrographs of the original wood powder，regenerated wood powder and the residua were quite different from each others. The regenerated wood appeared some micro voids special construction.

scholarly journals The CO2 Absorption in Flue Gas Using Mixed Ionic Liquids

Molecules ◽  
2020 ◽  
Vol 25 (5) ◽  
pp. 1034 ◽  
Author(s):  
Guoqing Wu ◽  
Ying Liu ◽  
Guangliang Liu ◽  
Xiaoying Pang
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Flue Gas ◽  
Active Sites ◽  
Structural Changes ◽  
Absorption Capacity ◽  
Co2 Absorption ◽  
Quantum Chemical Methods ◽  
Before And After ◽  
Calculation Results

Because of the appealing properties, ionic liquids (ILs) are believed to be promising alternatives for the CO2 absorption in the flue gas. Several ILs, such as [NH2emim][BF4], [C4mim][OAc], and [NH2emim[OAc], have been used to capture CO2 of the simulated flue gas in this work. The structural changes of the ILs before and after absorption were also investigated by quantum chemical methods, FTIR, and NMR technologies. However, the experimental results and theoretical calculation showed that the flue gas component SO2 would significantly weaken the CO2 absorption performance of the ILs. SO2 was more likely to react with the active sites of the ILs than CO2. To improve the absorption capacity, the ionic liquid (IL) mixture [C4mim][OAc]/ [NH2emim][BF4] were employed for the CO2 absorption of the flue gas. It is found that the CO2 absorption capacity would be increased by about 25%, even in the presence of SO2. The calculation results suggested that CO2 could not compete with SO2 for reacting with the IL during the absorption process. Nevertheless, SO2 might be first captured by the [NH2emim][BF4] of the IL mixture, and then the [C4mim][OAc] ionic liquid could absorb more CO2 without the interference of SO2.

Preparation and Properties of ZnO by Ionic Liquid Assisted Sol-Gel Method

2012 ◽  
Vol 581-582 ◽  
pp. 578-581 ◽  
Author(s):  
Yan Li Jiang ◽  
Jia Yao Liu ◽  
Mei Tian ◽  
Li Juan Yang ◽  
Rui Hai Cui
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Rhodamine B ◽  
Sol Gel ◽  
Target Material ◽  
Nano Zno ◽  
Gel Method ◽  
Sol Gel Method ◽  
Before And After ◽  
Zno Powder

Zinc oxide nanopowder was prepared by sol-gel method using oxalic acid and zinc acetate as starting material for the first time. And Rhodamine B as the target material to study the different levels of ionic liquids on the photocatalytic performance of nano-ZnO. ZnO powder was determined by SEM and XRD for introduction of ionic liquids derived from nano-ZnO surface morphology and crystal before and after. The results show that nano-ZnO catalyst surface pores increased and grain refinement by adding ionic liquid which is conducive to nano-ZnO on the photocatalytic degradation of Rhodamine B.

scholarly journals A Review on Ionic Liquid Gas Separation Membranes

Membranes ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 97
Author(s):  
Karel Friess ◽  
Pavel Izák ◽  
Magda Kárászová ◽  
Mariia Pasichnyk ◽  
Marek Lanč ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Gas Separation ◽  
Carbon Capture ◽  
Reaction Medium ◽  
Mixed Matrix Membranes ◽  
Liquid Membranes ◽  
Mixed Gas ◽  
Separation Processes ◽  
Ion Gels

Ionic liquids have attracted the attention of the industry and research community as versatile solvents with unique properties, such as ionic conductivity, low volatility, high solubility of gases and vapors, thermal stability, and the possibility to combine anions and cations to yield an almost endless list of different structures. These features open perspectives for numerous applications, such as the reaction medium for chemical synthesis, electrolytes for batteries, solvent for gas sorption processes, and also membranes for gas separation. In the search for better-performing membrane materials and membranes for gas and vapor separation, ionic liquids have been investigated extensively in the last decade and a half. This review gives a complete overview of the main developments in the field of ionic liquid membranes since their first introduction. It covers all different materials, membrane types, their preparation, pure and mixed gas transport properties, and examples of potential gas separation applications. Special systems will also be discussed, including facilitated transport membranes and mixed matrix membranes. The main strengths and weaknesses of the different membrane types will be discussed, subdividing them into supported ionic liquid membranes (SILMs), poly(ionic liquids) or polymerized ionic liquids (PILs), polymer/ionic liquid blends (physically or chemically cross-linked ‘ion-gels’), and PIL/IL blends. Since membrane processes are advancing as an energy-efficient alternative to traditional separation processes, having shown promising results for complex new separation challenges like carbon capture as well, they may be the key to developing a more sustainable future society. In this light, this review presents the state-of-the-art of ionic liquid membranes, to analyze their potential in the gas separation processes of the future.

Ionic Liquid Assisted Sol-Gel Prepared Ce-Doped ZnO

2012 ◽  
Vol 490-495 ◽  
pp. 3262-3265 ◽  
Author(s):  
Yan Li Jiang ◽  
Yan Liu ◽  
Li Juan Yang ◽  
Jia Yao Liu ◽  
Yu Fei Lin
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Rhodamine B ◽  
Sol Gel ◽  
Target Material ◽  
Nano Zno ◽  
Before And After ◽  
Doped Zno ◽  
Zno Crystal ◽  
First Time

Ce4+-doped zinc oxide was prepared by Ionic liquid assisted sol - gel method using oxalic acid and zinc acetate as starting material for the first time. And rhodamine B as the target material to study ionic liquid assisted preparation of Ce4+-doped ZnO photocatalytic performance. ZnO was determined by SEM and XRD for introduction of ionic liquids and Ce4+ derived from nano-ZnO surface morphology and crystal before and after. The results show that the Ce4+-doped nano-ZnO crystal structure of a rod. In ionic liquids based on the Ce4+-doped photocatalytic properties of ZnO better. The degradation of rhodamine B 30min when the degradation rate of 90%.

Separation of Naphthenic Acid Using Hydroxide Based Ionic Liquids

2014 ◽  
Vol 625 ◽  
pp. 570-573 ◽  
Author(s):  
Syed Nasir Shah ◽  
Mohammed Ibrahim Abdul Mutalib ◽  
Rashidah Binti Mohd Pilus ◽  
Kallidanthiyil Chellappan Lethesh
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Naphthenic Acid ◽  
Liquid Model ◽  
Before And After ◽  
Different Temperatures ◽  
Model Oil

Isolation of naphthenic acid from model oil using hydroxide based ionic liquid was investigated. A detailed de-acidification study at different temperatures and different ionic liquid/model oil was performed and the content of naphthenic acid before and after extraction was calculated. The ILs containing hydroxide anions has the potential to completely deacidify model oil having high TAN with extremely low ionic liquid /oil ratio.

scholarly journals Supported Ionic Liquid Membranes for Separation of Lignin Aqueous Solutions

Processes ◽  
2018 ◽  
Vol 6 (9) ◽  
pp. 143 ◽  
Author(s):  
Ricardo Abejón ◽  
Javier Rabadán ◽  
Silvia Lanza ◽  
Azucena Abejón ◽  
Aurora Garea ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Value Added ◽  
Successful Implementation ◽  
Liquid Membranes ◽  
Separation Processes ◽  
Selective Transport ◽  
Supported Ionic Liquid ◽  
Effective Separation ◽  
Selective Membrane ◽  
Supported Ionic Liquid Membranes

Lignin valorization is a key aspect to design sustainable management systems for lignocellulosic biomass. The successful implementation of bio-refineries requires high value added applications for the chemicals derived from lignin. Without effective separation processes, the achievement of this purpose is difficult. Supported ionic liquid membranes can play a relevant role in the separation and purification of lignocellulosic components. This work investigated different supported ionic liquid membranes for selective transport of two different types of technical lignins (Kraft lignin and lignosulphonate) and monosaccharides (xylose and glucose) in aqueous solution. Although five different membrane supports and nine ionic liquids were tested, only the system composed by [BMIM][DBP] as an ionic liquid and polytetrafluoroethylene (PTFE) as a membrane support allowed the selective transport of the tested solutes. The results obtained with this selective membrane demonstrated that lignins were more slowly transferred from the feed compartment to the stripping compartment through the membrane than the monosaccharides. A model was proposed to calculate the effective mass transfer constants of the solutes through the membrane (values in the range 0.5–2.0 × 10−3 m/h). Nevertheless, the stability of this identified selective membrane and its potential to be implemented in effective separation processes must be further analyzed.

Mapping the “Extra Solvent Power, ESP” of Ionic Liquids for Monomers, Polymers and Globular Nanoparticles

2017 ◽  
Author(s):  
Jose A. Pomposo
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Linear Polymers ◽  
Green Solvents ◽  
Ionic Polymers ◽  
First Time ◽  
Solvent Power

Understanding the miscibility behavior of ionic liquid (IL) / monomer, IL / polymer and IL / nanoparticle mixtures is critical for the use of ILs as green solvents in polymerization processes, and to rationalize recent observations concerning the superior solubility of some proteins in ILs when compared to standard solvents. In this work, the most relevant results obtained in terms of a three-component Flory-Huggins theory concerning the “Extra Solvent Power, ESP” of ILs when compared to traditional non-ionic solvents for monomeric solutes (case I), linear polymers (case II) and globular nanoparticles (case III) are presented. Moreover, useful ESP maps are drawn for the first time for IL mixtures corresponding to case I, II and III. Finally, a potential pathway to improve the miscibility of non-ionic polymers in ILs is also proposed.

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