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Showing 1 to 18 of 18 for “"microporous materials"”.
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Hydrogen sorption in palladium doped microporous materials
… uptake of bridged and chemically doped porous materials at room temperatures. XRD, Temperature Programmed Desorption and hydrogen sorption measurements were used to characterise the as-received and palladium doped porous materials. The hydrogen uptakes of as-received Maxsorb (activated carbon), …
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Microporous materials fabricated from discrete molecular cages
In the context of materials science, an interesting relationship exists between the properties of solid materials and the existence of void spaces within them. In fact, whether the presence of voids is desired or not tends to depend on one’s perception of the effects that voids induce. In densified …
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The flow of aqueous humor in microporous materials
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1987.
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NMR Techniques for Measuring Transport Phenomena in Microporous Materials
… molecules adsorbed in industrially relevant microporous zeolite materials using Pulsed Field Gradient Nuclear Magnetic Resonance (PFG NMR). The main body of this work involves the use of weakly adsorbing hydrocarbon gases (CH4, C2H6 and C3H¬8) adsorbed in a large pore β-zeolite structure. …
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Multinuclear Solid-State Nuclear Magnetic Resonance Spectroscopy of Microporous Materials
Microporous materials have attracted tremendous attention since 18th century due to their industrial importance. It is essential to understand the relationships between the properties of microporous materials and their structures. However, the structures of many microporous materials are determined …
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Fundamental research of the solvent role in the ionothermal synthesis of microporous materials
Zeolites and zeolite-like materials are a group of porous materials with many applications in industry including but not limited to detergent builders and catalyst in the oil refining and petrochemical industry, due to their unique properties such as uniform pore size, large surface area and …
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Microporous Polymer-Metal Organic Framework (MOF) Hybrid Materials for Separations
… in the chemical industry. Recent advancements in microporous materials, such as polymers of intrinsic microporosity (PIMs) and metal-organic frameworks (MOFs), have demonstrated performance improvements over conventional polymers. Mixed-matrix membranes (MMMs) have emerged as a potent strategy, …
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Determining the lon-exchange Mechanism of Strontium into a Niobium Doped Titanosilicate
… of sitinakite. Exchange of strontium into the microporous material reaches a maximum fractional occupancy of 21% when a 10.0 mM strontium ion solution is forced over the powdered material. Sequestration of strontium into this material has contributed valuable information to the study of …
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Characterisation of silicalite and post synthesis modified silicalite using adsorption
The study of adsorption on microporous materials such as zeolites is of tremendous scientific and industrial interest. The effective development and design of both equipment and processes is reliant on the availability of accurate information on the processes of adsorption in these materials. …
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Functional Materials From Self-Assembled Macrocycles
<p> Organic self-assembled materials have great utility as sensing materials, in gas storage, in separations, and as electronic devices. These assembled materials are typically held by non-covalent interactions such as hydrogen bonds, pi-pi stacking and dipole-dipole interactions. We are interested …
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Multiscale Analysis of Failure in Heterogeneous Solids Under Dynamic Loading
… strain-rate-hardening and thermally softening microporous materials. Values of material parameters of composites are derived by analyzing deformations of a representative volume element whose minimum dimensions are determined through numerical experiments. These values are found to be …
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Catalytic consequences of inner- and outer-sphere interactions at the solid-liquid interface in zeolites
… inner- and outer-sphere interactions within microporous materials and will aid in the rational design of improved materials.
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A multi-technique approach to characterise acidic surface properties of microporous catalysts
Microporous catalysts belong to a class of materials that exhibit pore networks in the molecular dimension, that is, channel diameters less than 2 nm. The industrially most important microporous catalysts are zeolites, which are crystalline aluminosilicates and consist of interlinked alumina (AlO4) …
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Crystal engineering of mixed-ligand metal-organic frameworks
… gases. Advances in the design of these materials using the mixed ligand approach add to variation in structures and thus provide a further means of tailoring of properties. A novel two dimensional, mixed ligand MOF has been synthesised based on 1,3,5 benzenetricarboxylic acid, 4,4' …
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Crystalline, Amorphous, and Liquid Metal-Organic Frameworks at Non-Ambient Conditions
… in the traditional sense, are crystalline and microporous materials. MOFs are of incessant scientific interest due to their enormous potential as host structures for a range of chemical process applications, including molecular separation, catalytic reaction, and gas storage. In the course of …
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Design of Robust Heterogeneous Catalysts for Sustainable Chemistry
… known as HTT 1800, Clariant Advanced Materials GmbH, Sulzbach, Germany) by the transfer of metal to its nitrogen functions. The modified polymer was transformed to an amorphous SiCN material containing metal NPs by controlled pyrolysis under an inert atmosphere. By following …
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Influence of surface tension and concentration of a non-ionic surfactant on the barrier effectiveness of a microporous polypropylene fabric for pesticide protective clothing
… the barrier effectiveness of a fabric containing microporous polypropylene (PP) film that may be used in pesticide protective clothing (PPC). Aqueous solutions of Triton® X-100, a non-ionic surfactant, at various concentrations were prepared, and the γ of each solution was determined. The …
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Phase Behavior and Phase Separation Kinetics in Polymer Solutions under High Pressure
… new solvent/non-solvent systems for forming microporous materials. These phase boundaries were determined using a high-pressure view-cell and optical techniques over a temperature range of 90-165 oC and pressures up to 55 MPa for PE/n-pentane/CO2 system, and over a temperature range of 25 to …