Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"porous solids"”.
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Elastic properties and failure behavior of disordered porous solids : a potential-of-mean-force-based lattice element approach
… elastic and failure properties of heterogeneous solids is the focus of this thesis. Emphasis is placed on porous media that are critical for many industry sectors, that either aim at engineering the porosity and its distribution in synthesized materials to reach desired properties; or at …
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Type 3 porous liquids: compressibility and gas and liquid separations
… investigates the compressibility of Type 3 porous liquids and gas and liquid separation by Type 3 porous liquids. Current studies suggest that Type 3 porous liquids might have great potential to be applied as gas adsorbents in industry. Although in literature, the uptake of gases such as …
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Tubos de impedância e suas aplicações na determinação de propriedades acústicas de meios porosos
… and absortion coefficients in fluid-saturated porous solids are experimentally determined in air and water in impedance tubes. An experimental methodology is developed for the measurements in water. A study is made of the ways in which the experimentally measured parameters porosity, density, …
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The synthesis and studies of type II porous liquids
Porous solids, such as metal-organic frameworks and zeolites are widely recognised for their applications in catalysis and molecular separation, whilst the area of Porous Liquids (PLs) is still a relatively new concept. PLs, like porous solids, are designed to exhibit permanent microporosity but …
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Invariant mechanical properties of calcium-silicate-hydrates (C-H-S) in cement-based materials : instrumented nanoindentation and microporomechanical modeling
Random porous solids such as bone and geomaterials exhibit a multiphase composite nature, characterized by water-filled pores of nm- to m-scale diameter. The natural synthesis and operating environments of such materials significantly alters phase composition and multiscale structural …
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Two-Dimensional Finite Element Analysis of Porous Geomaterials at Multikilobar Stress Levels
… and developing mechanical properties for porous geomaterials subjected to the high pressures encountered in penetration and blast-type loadings. A finite element (FE) code was developed to verify laboratory test results or to predict unavailable laboratory test data for porous media loaded …
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Electrically conductive porous catecholate metal-organic frameworks
Metal-organic frameworks (MOFs) are porous crystalline solids made up from countless possible combinations of organic ligands and metal nodes. MOF research has seen rapid expansion in the past two decades owing to the high surface areas of MOFs – and since the first studies in the mid-1990s, these …
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Modelling Non-Catalytic Gas-Solid Reactions
… for non-catalytic reactions between gases and porous solids, particularly those relevant to the clean use of fossil fuels. Here, the internal pore structure of the solid was characterised by observing the kinetics in a regime limited only by intrinsic chemical reaction. It was hypothesised that …
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Sorption in disordered porous media
The lattice-gas model of sorption in disordered porous media is studied for a variety of settings, using existing, updated and newly developed numerical techniques. Firstly, we construct an efficient algorithm to calculate the exact partition function for small lattice-gas systems. The exact …
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Porosity control of alkali-activated aluminosilicates via functional alkoxysilane additives
… the sequestration of surplus water in mesoporous structures through a waterlocking mechanism. Numerous property modifications were observed as a result. Examination with nitrogen adsorption showed an order of magnitude decrease in mesopore volume, while compressive testing found a 48% …
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Advanced Optimization Techniques For Monte Carlo Simulation On Graphics Processing Units
… algorithm for the simulation of adsorption in porous materials. We focus on Nvidia's GPUs and CUDA's Fermi architecture specifically. The resulting package supports the different ensemble methods for the Monte Carlo simulation, which will allow for the simulation of multi-component adsorption …
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Microporous materials fabricated from discrete molecular cages
… the ability to introduce intentional voids in solids presents multiple difficulties. The statement “nature abhors a vacuum” is a familiar quip that reflects this challenge of designing open pore spaces in solid materials, as porous frameworks with open void spaces are often higher in energy …
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Modeling the Transient Effects during the Hot-Pressing of Wood-Based Composites
A numerical model based on fundamental engineering principles was developed and validated to establish a relationship between process parameters and the final properties of woodbased composite boards. The model simulates the mat formation, then compresses the reconstituted mat to its final …
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Synthesis and Characterization of Metal-Organic Frameworks Organized by the Strong π...π Stacking 1,8-Naphthalimide Synthon
… of the waters in these closely packed solids is facilitated by the “soft” π...π stacking interactions organizing one dimension of the structures. The observed magnetic and Mössbauer spectral properties are typical of isolated, magnetically dilute, paramgnetic pseudooctahedral divalent …