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.

Constructing CO2-facilitated transport highway in supported ionic liquid membranes

2014 ◽  
Vol 07 (02) ◽  
pp. 1450012 ◽  
Author(s):  
Xiang Jun Sun ◽  
Ju Jie Luo ◽  
Meng Zhang ◽  
Jin Ping Li
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquid ◽  
Upper Bound ◽  
Liquid Membrane ◽  
Facilitated Transport ◽  
Reversible Reaction ◽  
Liquid Membranes ◽  
Supported Ionic Liquid ◽  
Selective Membrane ◽  
Supported Ionic Liquid Membranes

A Carbon dioxide-facilitated transport highway ( CO 2-FTH) on the microporous surface of a membrane matrix was designed using the amino carrier 3-aminopropyltriethoxysilane (APTES). Owing to the reversible reaction between CO 2 molecules and fixed-site carriers, this supported ionic liquid membrane was able to selectively transfer CO 2 more quickly. This concept may inspire means of fabricating a highly permeable and selective membrane to break through Robeson's upper bound.

scholarly journals Investigating the Proton and Ion Transfer Properties of Supported Ionic Liquid Membranes Prepared for Bioelectrochemical Applications Using Hydrophobic Imidazolium-Type Ionic Liquids

Membranes ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 359
Author(s):  
László Koók ◽  
Piroska Lajtai-Szabó ◽  
Péter Bakonyi ◽  
Katalin Bélafi-Bakó ◽  
Nándor Nemestóthy
Keyword(s):  
Mass Transfer ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Microbial Fuel Cells ◽  
Transport Numbers ◽  
Liquid Membranes ◽  
Ion Transfer ◽  
Supported Ionic Liquid ◽  
Supported Ionic Liquid Membranes ◽  
Transfer Properties

Hydrophobic ionic liquids (IL) may offer a special electrolyte in the form of supported ionic liquid membranes (SILM) for microbial fuel cells (MFC) due to their advantageous mass transfer characteristics. In this work, the proton and ion transfer properties of SILMs made with IL containing imidazolium cation and [PF6]− and [NTf2]− anions were studied and compared to Nafion. It resulted that both ILs show better proton mass transfer and diffusion coefficient than Nafion. The data implied the presence of water microclusters permeating through [hmim][PF6]-SILM to assist the proton transfer. This mechanism could not be assumed in the case of [NTf2]− containing IL. Ion transport numbers of K+, Na+, and H+ showed that the IL with [PF6]− anion could be beneficial in terms of reducing ion transfer losses in MFCs. Moreover, the conductivity of [bmim][PF6]-SILM at low electrolyte concentration (such as in MFCs) was comparable to Nafion.

Tailoring supported ionic liquid membranes for the selective separation of transesterification reaction compounds

2009 ◽  
Vol 328 (1-2) ◽  
pp. 81-85 ◽  
Author(s):  
Antonia P. de los Ríos ◽  
Francisco J. Hernández-Fernández ◽  
Hugo Presa ◽  
Demetrio Gómez ◽  
Gloria Víllora
Keyword(s):  
Ionic Liquid ◽  
Selective Separation ◽  
Transesterification Reaction ◽  
Liquid Membranes ◽  
Supported Ionic Liquid ◽  
Supported Ionic Liquid Membranes

Supported Ionic Liquid Membranes: Preparation, Stability and Applications

2012 ◽  
pp. 275-288
Author(s):  
A. P. de los Ríos ◽  
F. J. Hernández-Fernández ◽  
L. J. Lozano ◽  
C. Godínez
Keyword(s):  
Ionic Liquid ◽  
Liquid Membranes ◽  
Supported Ionic Liquid ◽  
Supported Ionic Liquid Membranes

scholarly journals The Effect of Microporous Polymeric Support Modification on Surface and Gas Transport Properties of Supported Ionic Liquid Membranes

Membranes ◽  
2015 ◽  
Vol 6 (1) ◽  
pp. 4 ◽  
Author(s):  
Alsu Akhmetshina ◽  
Ilsiya Davletbaeva ◽  
Ekaterina Grebenschikova ◽  
Tatyana Sazanova ◽  
Anton Petukhov ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Transport Properties ◽  
Gas Transport ◽  
Liquid Membranes ◽  
Polymeric Support ◽  
Supported Ionic Liquid ◽  
Gas Transport Properties ◽  
Supported Ionic Liquid Membranes
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