Metal organic framework mixed matrix membranes for gas separations

Adams, Ryan T.; Carson, Cantwell G.; Ward, Jason; Tannenbaum, Rina; Koros, William J.

doi:10.1016/j.micromeso.2009.11.035

Cited by 309 publications

(197 citation statements)

References 46 publications

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“…Some of the unconventional fillers used in the development MMMs are metal organic framework, zeolite imidazolate framework, mesoporous silica, hollow zeolite spheres, layered silicate and more [15][16][17][18]. Amongst them, POSS possesses the most unique feature.…”

Section: Introductionmentioning

confidence: 99%

The effect of amine substituent chain length on POSS/Polysulfone mixed matrix membrane

Bong¹,

Oh²,

Chew³

2018

J. MECH. ENG. SCI.

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The main obstacle encountered during the development of polyhedral oligomeric silsesquioxane (POSS) mixed matrix membrane (MMM) via physical blending is the combination of compatible inorganic filler and polymeric matrix. In this work, mono-functional POSS of different amine functionalised substituent chain lengths namely aminopropylisobutyl POSS (AMPOSS-a) and aminoethylaminopropylisobutyl POSS (AMPOSS-b) were incorporated into Polysulfone (PSf) membrane at 1wt%, 2wt% and 3wt% loadings. The effect of amine substituent chain lengths on its compatibility and dispersion properties as well as the glass transition temperature of the MMMs were studied using scanning electron microscope (SEM), energy dispersive X-ray (EDX) and differential scanning calorimeter (DSC). Particle agglomerations were observed to increase with the loadings of both fillers although more prominent in AMPOSS-b/PSf membranes. This was attributed to the interparticle forces such as van der Waals and electrostatic forces. Distribution of both fillers were concentrated at the upper region of the membranes at 1wt% and 2wt% as a consequence of their density difference. The glass transition temperature (T g ) for pristine PSf at 197ºC showed an overall decrement between 40.3ºC to 47.1ºC when AMPOSS-a and AMPOSS-b were incorporated. The decrement was due to AMPOSS particle loadings, surface chemistry and particle-polymer chain topology. Hence, mono-substituted POSS with varying amine substituent chain lengths did not improve the glass transition temperature nor contribute to homogeneous MMM morphology. This had been identified to be the consequence of POSS surface energy, which might be caused by the association of hydrocarbon chains saturated on the particle surface due to the presence of isobutyl group.

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Section: Introductionmentioning

confidence: 99%

The effect of amine substituent chain length on POSS/Polysulfone mixed matrix membrane

Bong¹,

Oh²,

Chew³

2018

J. MECH. ENG. SCI.

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“…Following on the success of previous works of Perez, et al [124] and Zhang, et al [204], R. Adams, et al, in 2010, prepared defect-free MMMs of CuTPA (a Cu-MOF) and PVAc with a 15% MOF loading [210]. Their permeability experiments showed that the CO2/CH4 selectivity of the MMM increased by as much as 15% over the pure polymer owing to the presence of the MOF in the membrane.…”

Section: Mofs In Mmmsmentioning

confidence: 93%

Origins and Evolution of Inorganic-Based and MOF-Based Mixed-Matrix Membranes for Gas Separations

et al. 2016

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Abstract:Gas separation for industrial, energy, and environmental applications requires low energy consumption and small footprint technology to minimize operating and capital costs for the processing of large volumes of gases. Among the separation methods currently being used, like distillation, amine scrubbing, and pressure and temperature swing adsorption, membrane-based gas separation has the potential to meet these demands. The key component, the membrane, must then be engineered to allow for high gas flux, high selectivity, and chemical and mechanical stability at the operating conditions of feed composition, pressure, and temperature. Among the new type of membranes studied that show promising results are the inorganic-based and the metal-organic framework-based mixed-matrix membranes (MOF-MMMs). A MOF is a unique material that offers the possibility of tuning the porosity of a membrane by introducing diffusional channels and forming a compatible interface with the polymer. This review details the origins of these membranes and their evolution since the first inorganic/polymer and MOF/polymer MMMs were reported in the open literature. The most significant advancements made in terms of materials, properties, and testing conditions are described in a chronological fashion.

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“…Thus, the pore size of 2.14 nm cannot be adopted for discussion. Presently, we suppose some specific interaction between TPA _ Cu and probe molecules, because it is well known that DMF, the solvent used for preparation, remains coordinated 28) , suggesting the presence of coordinatively unsaturated sites and the possibility of the interaction.…”

Section: Characterization Of Mofsmentioning

confidence: 93%

“…Here, we would like to discuss in more detail the relationships among the retention times for benzene and toluene, the average pore size by N2 adsorptiondesorption isotherm analysis, the reported pore size 28) 33) , and the d-spacing (layer-to-layer distance) obtained from X-ray diffraction peaks ( Table 3). In addition to the MP method, the micropore size was evaluated by the SF method assuming cylindrical pores and the HK method assuming slit-type pores.…”

Section: Characterization Of Mofsmentioning

confidence: 99%

金属有機構造体を用いたアルキルベンゼン類の速度論的分割

Sawai

Yonehara

Sano

et al. 2016

J. Jpn. Petrol. Inst.

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Metal-organic framework (MOF) compounds consisting of terephthalic acid and cations (Cr 3 , In 3 , Al 3 , Cu 2 and Zn 2 ) were prepared by the hydro-and solvo-thermal methods and characterized by XRD, N2 adsorptiondesorption isotherm, TG-DTA and FE-SEM. The prepared MOFs were crystalline and phase-pure. MOFs were used as column packings for chromatographic separation of alkylbenzenes. MOFs recognized differences in molecular sizes in addition to boiling points of alkylbenzenes. Activation energy for diffusion in the MOF micropores ranged from 25 to 60 kJ mol -1. Temperature-programmed XRD measurement in air revealed that no expansion or contraction of MOF frameworks occurred up to 230 .

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Metal organic framework mixed matrix membranes for gas separations

Cited by 309 publications

References 46 publications

The effect of amine substituent chain length on POSS/Polysulfone mixed matrix membrane

The effect of amine substituent chain length on POSS/Polysulfone mixed matrix membrane

Origins and Evolution of Inorganic-Based and MOF-Based Mixed-Matrix Membranes for Gas Separations

金属有機構造体を用いたアルキルベンゼン類の速度論的分割

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