Surface Energy‐Level Tuning of Silver Nanoparticles for Facilitated Olefin Transport

Chae, Il Seok; Kang, Sang Wook; Park, Ji Yun; Lee, Yong-Gun; Lee, Jung Hyun; Won, Jongok; Kang, Yong Soo

doi:10.1002/anie.201007557

Cited by 52 publications

(33 citation statements)

References 20 publications

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“…The temperature range was −80∼230°C at a heating rate of 15°C/min in a nitrogen atmosphere. The membrane area, 2.25 cm 2 , was evaluated using a mass flow meter at pressures of 207 kPa for the membranes. More than three samples were prepared for each concentration of Cu‐MOF in the MMMs, and the reported data represent the averaged values for the samples showing CO 2 /N 2 selectivity.…”

Section: Methodsmentioning

confidence: 99%

Matrix effect of mixed‐matrix membrane containing CO₂‐selective MOFs

Kim

Choi

Kang

et al. 2015

J of Applied Polymer Sci

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Facilitated mixed-matrix membranes (MMMs) containing Cu-metal organic frameworks (Cu-MOFs) with high CO 2 selectivity on an asymmetric polysulfone support were fabricated and examined the effect of gas separation performance using different matrices. An amorphous poly(2-ethyl-2-oxazoline) (POZ) and semicrystalline poly(amide-6-b-ethylene oxide) (PEBAX V R MH 1657) block copolymer were chosen as the polymeric matrix and the effect of the matrix on CO 2 separation for MMMs containing Cu-MOFs was investigated. The interaction of CO 2 in different matrix was investigated theoretically using the density functional theory method, and it was found that the amide segment in PEBAX would contribute more to the CO 2 solubility than ether segment. The morphological changes were investigated by differential scanning calorimetry, field emission scanning electron microscope and X-ray diffractometer. The ideal selectivity of CO 2 /N 2 was enhanced significantly with the addition of a Cu-MOF, and the values are higher in the Cu-MOF/PEBAX MMM compared with that in a POZ based asymmetric MMM. Improvement in the CO 2 /N 2 selectivity of a Cu-MOF/PEBAX MMM was achieved via facilitated transport by the CO 2 -selective Cu-MOFs due to both their high adsorption selectivity of CO 2 over N 2 and the decreased crystallinity of PEBAX due to the presence of the Cu-MOFs, which would provide a synergic effect on the CO 2 separation.

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Section: Methodsmentioning

confidence: 99%

Matrix effect of mixed‐matrix membrane containing CO₂‐selective MOFs

Kim

Choi

Kang

et al. 2015

J of Applied Polymer Sci

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“…The membrane selectivity achieved working with 50:50 v/v propylene/propane mixtures was 11 ( Table 3). After this work, others studies have begun to explore new molecules to polarize the surface of the Ag NP, 24,[119][120][121][122] always aiming to improve the selectivity of separation. 123 Therefore, Ag NP with sizes below this value can further improve the transport of the olefinic gases.…”

Section: Silver Nanoparticles As Carriermentioning

confidence: 99%

A Perspective of Solutions for Membrane Instabilities in Olefin/Paraffin Separations: A Review

Campos

Reis

Ortiz

et al. 2018

Ind. Eng. Chem. Res.

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Light olefins are mainly produced by naphtha steam cracking, which is among the more energy intensive processes in the petrochemical industry. To save energy, some alternatives have been proposed to partially replace or combine with cryogenic distillation the conventional technology to separate olefins and paraffins. Within this aim, facilitated transport membranes, mainly with Ag + cations as selective carriers, have received great attention owing to the high selectivity and permeance provided. However, to be used industrially, the undesirable instability associated with the Ag + cation should be considered. Poisonous agents and polymer membrane materials are sources of Ag + deactivation. In recent years, great achievements on the separation performance have been reported, but the current challenge is to maintain the selectivity in long-term separation processes. This work presents a critical analysis of the potential causes of Ag + deactivation and points out some alternatives that have been proposed to overcome the hurdle. This review highlights and critically analyses some perspectives of the ongoing development and application of facilitated transport membranes.

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“…Recently, we reported on the novel application of silver nanoparticles as an olefin carrier for olefin/paraffin separation [ 17 , 18 , 19 , 20 ]. The electron acceptors, such as p -benzoquinone ( p -BQ), 7,7,8,8-tetracyanoquinodimethane (TCNQ), and ionic liquids, such as 1-butyl-3-methyl imidazolium tetrafluoroborate (BMIIMBF 4 ), could modify the surface energy on silver nanoparticles as the electron-insufficient state, complexing reversibly with olefin molecules [ 17 , 18 , 19 , 20 ]. Ag ions could be interacted with olefin molecules via reversible pi-complexation, and the propylene molecules could be rapidly transported onto the surface of particles for Ag nanoparticles as olefin carriers.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Olefin Transport by SiO2 Particles for Polymer/Ag Metal/Electron Acceptor Composite Membranes

Kang

2020

Polymers

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We showed the potential of poly(ethylene-co-propylene) (EPR)/silver metal/p-benzoquinone composite membranes for propylene/propane mixtures, i.e., a selectivity of 10 and a mixed gas permeance of 0.5 GPU (1 GPU = 1 × 10−6 cm3 (STP)/(cm2 s cmHg) in a previous study. In this study, we additionally found that the incorporation of fumed silica nanoparticles into EPR/silver metal/p-benzoquinone (p-BQ) composite membranes exhibited much higher permeance and selectivity for propylene/propane mixtures. The positive polarity of silver metal continuously increased with the increasing silica content up to the 0.1 weight ratio, as revealed by x-ray photoelectron spectroscopy (XPS). This increase in the polarity of silver metal was attributed to the enhanced interaction of p-BQ with the surface of Ag nanoparticles by the increased dispersion of p-BQ by fumed silica nanoparticles. Differential scanning calorimetry (DSC) also presented that the glass transition temperature (Tg) of the membranes was almost invariant. Therefore, the improvement of the permeance and selectivity with the silica nanoparticles was attributable to the increased polarity of the silver metal rather than the structural change.

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Surface Energy‐Level Tuning of Silver Nanoparticles for Facilitated Olefin Transport

Cited by 52 publications

References 20 publications

Matrix effect of mixed‐matrix membrane containing CO₂‐selective MOFs

Matrix effect of mixed‐matrix membrane containing CO₂‐selective MOFs

A Perspective of Solutions for Membrane Instabilities in Olefin/Paraffin Separations: A Review

Enhanced Olefin Transport by SiO2 Particles for Polymer/Ag Metal/Electron Acceptor Composite Membranes

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Surface Energy‐Level Tuning of Silver Nanoparticles for Facilitated Olefin Transport

Cited by 52 publications

References 20 publications

Matrix effect of mixed‐matrix membrane containing CO2‐selective MOFs

Matrix effect of mixed‐matrix membrane containing CO2‐selective MOFs

A Perspective of Solutions for Membrane Instabilities in Olefin/Paraffin Separations: A Review

Enhanced Olefin Transport by SiO2 Particles for Polymer/Ag Metal/Electron Acceptor Composite Membranes

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Matrix effect of mixed‐matrix membrane containing CO₂‐selective MOFs

Matrix effect of mixed‐matrix membrane containing CO₂‐selective MOFs