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Dissertations / Theses on the topic 'Membrane ZIF-8'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

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1

Salvador, Levehang Claudia. "Développement de membranes MOF nanocomposites à base de ZIF." Thesis, Montpellier, Ecole nationale supérieure de chimie, 2014. http://www.theses.fr/2014ENCM0020.

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Les réseaux zéolithiques à base d'imidazolate (e.g. ZIF-8) sont des matériaux membranaires attractifs pour la séparation de gaz, sous réserve de pouvoir disposer de membranes de haute qualité, stables et reproductibles sur des supports industriels. Dans ce travail plusieurs stratégies ont été examinées pour développer des membranes nanocomposites à base de ZIF-8 confiné dans les macropores de supports céramiques tubulaires. Trois approches ont été comparées: i) croissance de germes, ii) croissance in situ et iii) conversion de ZnO. L'influence des paramètres de synthèse (formulation des soluti

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2

Phan, Le Quynh Nhu. "PIM-1/ ZIF-8 MIXED MATRIX MEMBRANE FOR CO2/ CH4 SEPARATION : Investigating the effect of ZIF-8 particle size on separation performance." Thesis, Umeå universitet, Kemiska institutionen, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-176672.

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3

Zamani, Ali. "Pervaporation Separation of Butanol from Aqueous Solutions Using Polydimethylsiloxane (PDMS) Mixed Matrix Membranes." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/40107.

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In this study, pervaporation, a membrane-based process was studied for in-situ separation of butanol. This technique has a great potential due to its high selectivity, low energy requirement and high efficiency. The primary objective was to improve the performance of the Polydimethylsiloxane (PDMS) membrane for the pervaporation separation and the recovery of butanol by adding nanoparticles into its matrix to make mixed matrix membrane (MMM). These nanoparticles included zinc-based Metal Organic Frameworks (MOFs) and zinc oxide. Different particle sizes of zeolitic imidazolate framework (ZIF-8

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4

Liu, Lichao. "Sulfonated poly ether ether sulfone membrane doped with ZIF-8 for enhancing performance in an all vanadium redox flow battery application." Case Western Reserve University School of Graduate Studies / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=case1516116142939028.

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5

Risaliti, Giulio. "Determinazione della performance di membrane composite per la purificazione di gas." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/22411/.

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In questo elaborato vengono presentati i risultati di una attività sperimentale incentrata sulla ricerca di membrane a matrice mista per la separazione di gas da miscele. In questo lavoro viene descritta la preparazione di membrane in polisulfone e membrane a matrice mista polisulfone con ZIF-8 a quattro diversi caricamenti percentuali, PSf+ZIF-8 2%, 4%, 8% e 16%. Vengono anche esposti i risultati delle prove di caratterizzazione di tali membrane. E' stato condotto un esame attraverso microscopia elettronica a scansione (SEM) sulla sezione e sulla superficie delle cinque membrane. Sono esposti

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6

Keser, Nilay. "Production And Performance Evaluation Of Zif-8 Based Binary And Ternary Mixed Matrix Membranes." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614571/index.pdf.

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Mixed matrix membranes (MMMs) have gained importance because they combine the desirable properties of the polymers and the organic/inorganic filler materials and they may have a very big potential. In this study polyethersulfone (PES) was used as polymeric material, and Zeolitic Imidazolate Framework-8 (ZIF-8) was used as porous filler material, and 2-hydroxy 5-methyl aniline(HMA), was used as a third component in membrane formulation. In this study, ZIF-8 crystals were synthesized with varying particle sizes, and a novel recycling methodology was developed to improve the efficiency of ZIF-8 p

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7

RODRIGUEZ, GOMEZ JUAN EDUARDO 554632, та GOMEZ JUAN EDUARDO RODRIGUEZ. "Síntesis y caracterización de membranas catalíticas de Cu-BTC y ZIF-8 soportadas en α-alúmina para la producción de hidrógeno". Tesis de maestría, Universidad Autónoma del Estado de México, 2015. http://hdl.handle.net/20.500.11799/79939.

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Esta tesis aborda las Redes Metal Orgánicas (MOFs), las cuales exhiben propiedades porosas, así como grandes áreas superficiales. Son eficientes en procesos de tamizado molecular, almacenamiento y catálisis heterogénea. Se sintetizaron membranas de dos diferentes MOFs, cobre y ácido benceno-1,3,5-tricarboxilico (BTC), y iones de zinc y 2-metilimidazol como ligando, este material es mejor conocido como ZIF-8. Las membranas homogéneas de CU-BTC y ZIF-8 fueron sintetizadas mediante el proceso de crecimiento secundario; y a través de la funcionalización de la superficie del soporte, para posterior

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8

Bryan, Nicholas James. "PEBAX-based mixed matrix membranes for post-combustion carbon capture." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31239.

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Polymeric membranes exhibit a trade-off between permeability and selectivity in gas separations which limits their viability as an economically feasible post-combustion carbon capture technology. One approach to improve the separation properties of polymeric membranes is the inclusion of particulate materials into the polymer matrix to create what are known as mixed matrix membranes (MMMs). By combining the polymer and particulate phases, beneficial properties of both can be seen in the resulting composite material. One of the most notable challenges in producing mixed matrix membranes is in t

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9

Tan, Xiaoyu. "Preparation of Zeolitic Imidazolate Framework-8 (ZIF-8) Membrane on Porous Polymeric Support via Contra-Diffusion Method." Thesis, 2016. http://hdl.handle.net/10754/609812.

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In the last decade, many attempts were made to put metal organic frameworks (MOFs) in industrial applications, but most of these efforts weren’t successfully. As one of the few MOFs produced on industrial scale, ZIF-8 has interesting pore size, huge internal surface area and great thermal and chemical stability. Therefore, ZIF-8 might become the first MOF, which will be applied in industrial separation processes. In this thesis, a synthesis study is presented, which leads to a cheap and convenient way to fabricate defect-free and thin ZIF-8 membranes on porous polymeric supports showing high

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10

Huang, Pei-Fang, and 黃珮芳. "Mixed matrix membrane consisting HIPS copolymer and porous ZIF-8 crystals for gas separation: Ammonia-assisted synthesis of ZIF-8 crystals in micro-aqueous solution." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/20957027177818651629.

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碩士<br>國立中興大學<br>環境工程學系所<br>104<br>Mixed matrix membranes (MMMs) consisting of organic and inorganic phase was raised much attention due to its mechanical strength, thermal ability, and good permselectivity compared to polymer membrane. However, the separation performance of MMMs was influenced by the dispersion of inorganic and the interfacial adhesion between the organic and inorganic phase. Therefore, the choice of suitable materials and the applicable methods to synthesis a defect-free MMMs with good performance have been discussed in the recent works. In this study, the symmetric and asymm

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11

Chi, Heng-Yu. "Synthesis of ZIF-8 membrane via facile cathodic deposition in aqueous medium for propylene/propane separation." Thesis, 2019. http://hdl.handle.net/10754/660251.

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Metal-organic frameworks (MOFs) are porous crystalline materials built by metal clusters coordinated to organic ligands. Synthesis of MOFs has attracted considerable attention in recent decades, owing to its potential for a wide range of applications such as gas separation, dye adsorption, and catalysis, etc. The development of MOF membranes further enhances the potential of this type of material in industrial applications. Membrane fabrication methods, including in-situ growth, seeded secondary growth, interfacial growth, and vapor-phase deposition, have been widely studied. However, mos

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12

Barankova, Eva. "Synthesis of Thin Film Composite Metal-Organic Frameworks Membranes on Polymer Supports." Diss., 2017. http://hdl.handle.net/10754/625042.

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Since the discovery of size-selective metal-organic frameworks (MOF) researchers have tried to manufacture them into gas separation membranes. ZIF-8 became the most studied MOF for membrane applications mainly because of its simple synthesis, good chemical and thermal stability, recent commercial availability and attractive pore size. The aim of this work is to develop convenient methods for growing ZIF thin layers on polymer supports to obtain defect-free ZIF membranes with good gas separation properties. We present new approaches for ZIF membranes preparation on polymers. We introduce zinc

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13

Deng, Yu-Heng, and 鄧有衡. "A Novel and Efficient Mixed Matrix Membrane (MMM) for Pervaporation of Ethanol/Water Mixtures owing to High and Homogeneous Loading of Zeolitic Imidazolate Frameworks-8 (ZIF-8) Nanoparticles." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/69672769485896599301.

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碩士<br>國立臺灣大學<br>化學工程學研究所<br>103<br>To overcome the problems of phase separation between polymer and fillers and low separation performance of a membrane at high filler loading, we have synthesized a novel and efficient mixed matrix membrane (MMM) by incorporating water-based synthesis of ZIF-8 nanoparticles into polyvinyl alcohol (PVA) membranes. The ZIF-8 nanoparticles without drying is preferred for the fabrication of PVA/ZFI-8 MMMs. The incorporation of ZIF-8 nanoparticles does increase both of the flux and separation factor of a PVA membrane. However, both of the pervaporation performances

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14

Ordonez, Ma Josephine C. "Gas permeability and selectivity properties of ZIF-8/Matrimid mixed-matrix membranes /." 2009. http://proquest.umi.com/pqdweb?did=1878825571&sid=5&Fmt=2&clientId=10361&RQT=309&VName=PQD.

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15

"Stability, Transport and Modification of Zeolitic Imidazolate Framework-8 Membranes for Light Hydrocarbon Separations." Doctoral diss., 2017. http://hdl.handle.net/2286/R.I.46184.

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abstract: Membrane technology is a viable option to debottleneck distillation processes and minimize the energy burden associated with light hydrocarbon mixture separations. Zeolitic imidazolate frameworks (ZIFs) are a new class of microporous metal-organic frameworks with highly tailorable zeolitic pores and unprecedented separation characteristics. ZIF-8 membranes demonstrate superior separation performance for propylene/propane (C3) and hydrogen/hydrocarbon mixtures at room temperature. However, to date, little is known about the static thermal stability and ethylene/ethane (C2) separation

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16

Tian, Qi-He, and 田棋合. "A novel method for the preparation of ZIF-8/polysulfone composite membranes for H2 purification." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/39874355403801206522.

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碩士<br>中原大學<br>化學工程研究所<br>105<br>Hydrogen production usually uses water–gas shift reaction. The product stream contains contaminants such as nitrogen, carbon dioxide, and methane. Therefore, how to separation the hydrogen from contaminants is quite important in hydrogen purification. For hydrogen purification, it is imperative to develop high-performing gas separation membranes in order to reduce energy consumption and environmental impacts. Metal-organic framework (MOFs) materials show variety aperture size and gas adsorption ability, therefore MOFs have been used for gas separation over the l

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17

Huang, Yu-Ching, and 黃昱璟. "The structure and gas separation behavior of ZIF-8-90(x)/Pebax mixed matrix membranes." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/12838377294675391685.

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碩士<br>中原大學<br>化學工程研究所<br>102<br>The study of mixed matrix membranes (MMMs) for gas separation received considerable attention in recent years. But there are many uncertainties about the effect of inorganic additive on the gas separation performance, physical structure and the free volume of MMMs. In this study, we use the commercial block copolymer Poly(ether-block-amide) (Pebax1657) as matrix and Zeolitic imidazolate framework-8-90 (x) with different substitution content of imidazole ligand as additive. The membranes with different amount of ZIF-8-90(x) were prepared by dry phase inversion m

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18

Chang, Chia-Hao, and 張家豪. "Zeolitic Imidazolate Framework-8 (ZIF-8) Membranes: Rational Design of Interfacial Synthesis and Enhanced Performance of Gas (CO2/N2) Separation." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/em648q.

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碩士<br>國立臺灣大學<br>化學工程學研究所<br>105<br>Metal-organic framework (MOF) membranes are potentially useful in gas separation applications, but conventional methods for preparing MOF membranes are multi-steps and under high-pressure synthetic conditions. In this thesis, a reliable one-step interfacial synthesis under atmospheric pressure has been developed for preparing zeolitic imidazolate framework-8 (ZIF-8) membranes supported on porous α-Al2O3 disks. To obtain defect-free ZIF-8 membranes, three reaction parameters were investigated: reaction time, reaction temperature, and concentration of 2-methyli

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19

Moura, Beatriz Quaresma Chaves Alves de. "Hybrid Ionic Liquids/Metal Organic Frameworks for CO2/CH4 separations." Master's thesis, 2018. http://hdl.handle.net/10362/49844.

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20

Wu, Yu-Hsun, and 吳于勳. "A Novel Aqueous Counter Diffusion Seeding Method for the Preparation of Zeolitic Imidazolate Framework-8 (ZIF-8) Membranes on Ceramic Hollow Fiber Supports for Gas Separation." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/6cbq4d.

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碩士<br>國立臺灣大學<br>化學工程學研究所<br>105<br>Zeolitic imidazolate framework ZIF-8 is one of the best known ZIF structures due to its small aperture size (0.34 nm) which is suitable for the most concerned gas separations, such as H2/CH4 and CO2/N2. Tons of researchers have devoted to preparing the ZIF-8 membranes in the past five years, which makes the ZIF-8 membranes step up to commercialization stage. However, the absence of a reliable and practical preparation process results in a difficulty in commercializing the ZIF-8 membranes. In this study, we proposed a novel counter diffusion seeding method com

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21

Hsieh, Yuan-Che, and 謝沅哲. "Pervaporation of acetic acid/water mixtures through a zeolitic imidazolate frameworks (ZIF-8)/poly(2,6-dimethyl-p-phenylene oxide) mixed matrix composite membranes." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/87491578121049684465.

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碩士<br>中原大學<br>化學工程研究所<br>103<br>In this study, ZIF-8 was added into a hydrophobic polymer, poly(2,6-dimethyl-p-phenylene oxide), and casted on PAN support membranes to form a mixed matrix composite membranes. The MMCMs was applied to separate 90wt% acetic acid aqueous solution. However, the pervaporation performance have limited by coupling effect between acetic acid and water at room temperature. This problem was solved by increasing operation temperature, because the kinetic energy of molecular was increased at high temperature that could decreased the interaction between water and acetic ac

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