Mixed matrix hollow fiber membranes made with modified HSSZ-13 zeolite in polyetherimide polymer matrix for gas separation

Husain, Shabbir; Koros, William J.

doi:10.1016/j.memsci.2006.11.016

Cited by 312 publications

(195 citation statements)

References 20 publications

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“…10,19 The FT-IR spectra measurements prove the successful covalent graing of the organic groups onto the silica wall. The FT-IR spectra patterns of KIT-6 and p-KIT-6 are shown in Fig.…”

Section: Ft-irmentioning

confidence: 84%

Mesoporous KIT-6 silica–polydimethylsiloxane (PDMS) mixed matrix membranes for gas separation

et al. 2015

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In this study, we have explored for the first time the use of the mesoporous KIT-6 silica as an additive to enhance the gas permeability and separation characteristics of PVDF supported polydimethylsiloxane (PDMS) with filler loadings varying between 0 and 25 wt%. The KIT-6 silica was synthesized by a templating method and functionalized through silanization confirmed via Fourier transform infrared spectroscopy. The SEM images of the MMMs suggested that p-KIT-6 silica particles could embed well into the PDMS matrix and the MMMs could be defect free. With an optimum loading of 2 wt%, the C 4 H 10 permeability and C 4 H 10 /N 2 ideal selectivity of the MMM were shown to increase by 464% and 248% compared with the neat polymer membrane, respectively. In addition, the optimum membrane was also evaluated for CO 2 /N 2 separation, which proved that the permeability and selectivity increasedsimultaneously. An interface morphology has also been proposed to explain the separation phenomenon of the MMM reasonably. Taken all together, it is expected that the mesoporous KIT-6 silica would be an attractive additive to enhance the gas separation performances of polymer membranes.

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“…10,19 The FT-IR spectra measurements prove the successful covalent graing of the organic groups onto the silica wall. The FT-IR spectra patterns of KIT-6 and p-KIT-6 are shown in Fig.…”

Section: Ft-irmentioning

confidence: 84%

Mesoporous KIT-6 silica–polydimethylsiloxane (PDMS) mixed matrix membranes for gas separation

et al. 2015

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“…Mixing polymeric materials with zeolites or other types of molecular sieving media creates membranes with properties that overcome the properties of the polymeric matrix. Such hybrid materials can also offer the advantage of low cost and better mechanical properties of the polymer when compared to typical inorganic membranes [1][2][3] . Successful defect-free mixed matrix membrane preparation has been reported especially when the polymer matrix is a rubbery polymer, since the flexible matrix promotes the formation of defect-free polymer/sieve interface 4 .…”

Section: Introductionmentioning

confidence: 99%

Ultem®/ZIF-8 Mixed Matrix Membranes for Gas Separation: Transport and Physical Properties

2016

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Mixed matrix membranes are promising options for improving gas separation processes. Zeolitic imidazolate frameworks (ZIFs) have a porous structure similar to conventional zeolites, being capable in principle of separating gases based on their differences in kinetic diameter while offering the advantage of having a partial organic character. This partial organic nature improves the compatibility between the sieve and the polymer, and a combination of the mentioned characteristics makes these hybrid materials interesting for the preparation of mixed matrix gas separation membranes. In this context the present work reports the preparation of Ultem  /ZIF-8 mixed matrix membranes and their permeabilities to pure CO 2 , N 2 and CH 4 gases. A significant increase in permeability with increase in CO 2 /N 2 selectivity was observed for the mixed matrix systems as compared to the properties of the neat Ultem  . Sorption results allowed to speculate that the ZIF-8 framework is not completely stable dimensionally, what influences the separation process by allowing gases with higher kinetic diameter than its nominal aperture to be sorbed and to diffuse through the crystal. Sorption and diffusion selectivities indicate that the higher separation performance of the mixed matrix membranes is governed by the diffusion process associated with the influence of gas molecule´s geometry.

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“…Now, research is ongoing to resolve the inter-crystalline diffusion path issue using mixed matrix membranes. Zeolite membranes have shown H2 permeance ranging from 10 -7 to <10 -8 mol m 2 s -1 Pa -1 with a maximum of H2/N2 selectivity of 4.8 between 35 and 125 o C; to be considered useful for gas separation applications these membranes have to be synthesized without macropore size defects or pinholes [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Composite-alumina-carbon molecular sieve membranes prepared from novolac resin and boehmite. Part II: Effect of the carbonization temperature on the gas permeation properties

Tanco

Tanaka

Mendes

2015

International Journal of Hydrogen Energy

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The influence of carbonization temperature on the permeation properties and aging of thin (4 m) supported carbon molecular sieve membranes (c-CMSM), prepared from in house synthesized novolac phenolic resin loaded with boehmite nanoparticles, were studied. Just after membrane carbonization (fresh membrane), high permeance to N2 and O2 and low O2/ N2 permselectivities were observed; the highest permeations were observed for carbonization end temperatures between 500 o C and 700 o C. After leaving the c-CMSM 1 day in the air, a large decrease in the permeation and considerable increase in the permselectivity were observed due to the reduction of the pore size by oxygen chemisorption and water physical adsorption; the permeability to H2 and H2/N2 ideal permselectivity for a mem-brane carbonized at 550 o C are close to palladium membranes for low temperature (<100 o C). The effect of the permeation characteristics of the membranes carbonized at various temperatures and the removal of water adsorbed in the pores by heat treatment were studied.

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Mixed matrix hollow fiber membranes made with modified HSSZ-13 zeolite in polyetherimide polymer matrix for gas separation

Cited by 312 publications

References 20 publications

Mesoporous KIT-6 silica–polydimethylsiloxane (PDMS) mixed matrix membranes for gas separation

Mesoporous KIT-6 silica–polydimethylsiloxane (PDMS) mixed matrix membranes for gas separation

Ultem®/ZIF-8 Mixed Matrix Membranes for Gas Separation: Transport and Physical Properties

Composite-alumina-carbon molecular sieve membranes prepared from novolac resin and boehmite. Part II: Effect of the carbonization temperature on the gas permeation properties

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