Propylene/propane separation using N-methyl pyrrolidone/AgNO 3 supported liquid membrane

Azizi, Shima; Kaghazchi, Tahereh; Kargari, Ali

doi:10.1016/j.jtice.2015.05.012

Cited by 23 publications

(13 citation statements)

References 52 publications

(61 reference statements)

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“…A review of olefin/paraffin separation using FTM has been published in 2012 by Faiz and Li [ 16 ]. More recent works dealt with the use of N-methyl pyrrolidone coupled with AgNO 3 salt as liquid membranes, supported on tetrafluoroethylene (PTFE), by Azizi et al [ 17 ] to separate propylene from propane in 2015. Supported ionic liquid membranes have been recently used by Zarca and co-workers [ 18 ] to enhance the selectivity of propylene/propane.…”

Section: Introductionmentioning

confidence: 99%

Models for Facilitated Transport Membranes: A Review

2019

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Facilitated transport membranes are particularly promising in different separations, as they are potentially able to overcome the trade-off behavior usually encountered in solution-diffusion membranes. The reaction activated transport is a process in which several mechanisms take place simultaneously, and requires a rigorous theoretical analysis, which unfortunately is often neglected in current studies more focused on material development. In this work, we selected and reviewed the main mathematical models introduced to describe mobile and fixed facilitated transport systems in steady state conditions, in order to provide the reader with an overview of the existing mathematical tools. An analytical solution to the mass transport problem cannot be achieved, even when considering simple reaction schemes such as that between oxygen (solute) and hemoglobin (carrier) ( A + C ⇄ A C ), that was thoroughly studied by the first works dealing with this type of biological facilitated transport. Therefore, modeling studies provided approximate analytical solutions and comparison against experimental observations and exact numerical calculations. The derivation, the main assumptions, and approximations of such modeling approaches is briefly presented to assess their applicability, precision, and flexibility in describing and understanding mobile and fixed site carriers facilitated transport membranes. The goal is to establish which mathematical tools are more suitable to support and guide the development and design of new facilitated transport systems and materials. Among the models presented, in particular, those from Teramoto and from Morales-Cabrera et al. seem the more flexible and general ones for the mobile carrier case, while the formalization made by Noble and coauthors appears the most complete in the case of fixed site carrier membranes.

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Section: Introductionmentioning

confidence: 99%

Models for Facilitated Transport Membranes: A Review

2019

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“…[6][7][8][9][10] Aqueous and organic solvents in combination with transition metal salts (eg, Cu + or Ag + salt), have been extensively used as the reactive absorbents, where Ag + or Cu + form selective complex with C 3 H 6 via π-bound interaction. [3,[11][12][13][14][15] This complex can reversibly release C 3 H 6 by pressure and temperature swing methods. However, these solvents lead to some problems such as the stability of Ag + or Cu + in these solvents and solvent loss due to volatility during absorption or desorption.…”

Section: Introductionmentioning

confidence: 99%

Separation of propylene and propane by functional mixture of imidazolium thiocyanate ionic liquid‐organic solvent‐cuprous salt

et al. 2021

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This work presented the preparation of two new systems comprised of ionic liquids (ILs), organic solvent, and cuprous salt. Consequently, their absorption ability was investigated for propylene (C 3 H 6 ) and propane (C 3 H 8 ) and their mixtures at 100 kPa-700 kPa pressure and 298 K-318 K temperature. Representative ILs were 1-butyl-3-methylimidazolium thiocyanate ([C 4 mim]SCN) and 1-ethyl-3-methylimidazolium thiocyanate ([C 2 mim]SCN). N,N-dimethylformamide (DMF) and cuprous thiocyanate (CuSCN) were selected for the absorption system. The effects of operating parameters like Cu + concentration, pressure, temperature, and recycling of ILs absorbency were examined and compared with the literature. It was observed that C 3 H 6 shows a chemical absorption while C 3 H 8 undergoes a physical one by [C 4 mim]SCN-DMF-CuSCN and [C 2 mim]SCN-DMF-CuSCN, and an increase in concentration of Cu + effectively improves the absorption capability for C 3 H 6 and the selectivity of C 3 H 6 /C 3 H 8 . Furthermore, [C 4 mim]SCN-DMF-CuSCN had higher absorption capability and selectivity for C 3 H 6 than [C 2 mim]SCN-DMF-CuSCN. [C 4 mim]SCN-CuSCN-2.0 M absorbed 0.637 mol of C 3 H 6 per litre while 0.16 mol of C 3 H 8 per litre at 700 kPa and 298 K, with a selectivity of 3.9. This work shows that new combination of organic solvent and ILs with Cu + salt is a new class of potential reactive absorbents to separate C 3 H 6 and C 3 H 8 .

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“…The most basic approach consists in filling the pores of a polymeric support with a liquid solution of the carrier salt. However, this supported liquid membranes (SLM) lack from stability due to solvent evaporation and dragging [6][7][8][9]. Although the use of novel ionic liquids has overcome the solvent evaporation problems, the expelling out of solvent from the pores due to the transmembrane pressure is still a major drawback [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Comprehensive study on PVDF-HFP/BMImBF4/AgBF4 membranes for propylene purification

Zarca

Campos

Ortiz

et al. 2019

Journal of Membrane Science

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In this work, a comprehensive analysis of PVDF-HFP/BMImBF 4 /AgBF 4 facilitated transport membranes for olefin/paraffin separation is presented. Previous works of our research group have reported high flux and propylene selectivity under dry conditions and using synthetic gas mixtures, highlighting the promising potential of these experimental evidence for the previously theorized facilitated transport mechanisms and reveal a major influence of feed gas humidity on membrane performance. On the other hand, the industrial gas mixture produces no deviation from synthetic feed conditions due to trace contaminants. Finally, the carrier deactivation in long-term permeation has been quantified through a mathematical expression.

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Propylene/propane separation using N-methyl pyrrolidone/AgNO 3 supported liquid membrane

Cited by 23 publications

References 52 publications

Models for Facilitated Transport Membranes: A Review

Models for Facilitated Transport Membranes: A Review

Separation of propylene and propane by functional mixture of imidazolium thiocyanate ionic liquid‐organic solvent‐cuprous salt

Comprehensive study on PVDF-HFP/BMImBF4/AgBF4 membranes for propylene purification

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