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 20 of 42 for “"gas sorption"”.
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Design of a gas sorption measurement system
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1991.
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CARBON STRUCTURES AND Mg-BASED MATERIALS FOR GAS SORPTION
… which can effectively alleviate greenhouse gas emissions and reduce dependence on fossil fuels. The other promising approach in reducing greenhouse gas emissions is carbon capture. Mgbased materials have been considered as a promising hydrogen storage system due to their high hydrogen …
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Gas Sorption and Swelling in Glassy Polymers - Combining Experiment, Phenomenological Models and Detailed Atomistic Molecular Modeling
… Arbeit werden grundlegende Fragen zur Gas-Sorption und der damit verbundenen Quellung von glasigen Polymeren untersucht. Dabei wurde eine kombinierte Analyse aus experimenteller Charakterisierung, detailliert atomistischer Modellierung und phänomenologisch-theoretischer Betrachtung …
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Determining the constants for an analyzing the predictive capabilities of a gas sorption model for semi-crystalline polymers
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1992.
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Measurements, Modeling and Analysis of High Pressure Gas Sorption in Shale and Coal for Unconventional Gas Recovery and Carbon Sequestration
In order to exploit unconventional gas and estimate carbon dioxide storage potential in shale formations and coal seams, two key questions need to be initially answered: 1) What is the total gas-in-place (GIP) in the subsurface reservoirs? 2) What is the exact ratio between bulk gas content and …
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Pressure-Property Relationships in High-Performance Elastomers
… (FKM), widely used in high pressure gas environments, have attracted significant interest from both fundamental research and industrial development. The changes in the glass transition temperature (Tg) and gas sorption behavior of elastomers due to high-pressure gases can have …
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Crystal engineering of mixed-ligand metal-organic frameworks based on simple carboxylate and bipyridyl ligands
… ligands which may ultimately be used in the gas storage of pollutants, greenhouse gases or fuel. Two novel 2D mixed-ligand MOFs, both based on manganese, 4,4’-bipyridine and 1,3,5- benzenetricarboxylic acid, have been prepared and fully characterized. The employment of dimethylformamide or …
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Investigations of Electron Transport Properties in Metal-Organic Frameworks for Catalytic Applications
… for their applications in areas such as gas sorption and separation, catalysis, drug delivery, and electron or proton conduction. It has been the goal of my graduate research to investigate MOFs for their ability to transport electrons and store and separate gases for ultimate catalytic …
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Functionalized Single Walled Carbon Nanotube/Polymer Nanocomposite Membranes for Gas Separation and Desalination
Polymeric membranes for gas separation are limited in their performance by a trade-off between permeability and selectivity. New methods of design are necessary in making membranes, which can show both high permeability and selectivity. A mixed matrix membrane is one such particular design, which …
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The synthesis and characterization of porous, conductive, and ordered materials
… acts as a potential avenue for charge transfer. Gas sorption measurements suggest that the materials retain porosity upon evacuation. The material possesses high charge mobility as determined by flash photolysis time-resolved microwave conductivity measurements.
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X-ray Scattering Study Of Capillary Condensation In Mesoporous Silica
… water as the capillary condensation agent.The gas sorption method and SAXS were used to extract the pore parameters of the samples.The stresses acting on the silica scaffold due to the presence of water in the pores were deduced by careful analysis of various forces acting on it. The Poisson's …
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Fundamental Investigations of Hazardous Gas Uptake and Binding in Metal-Organic Frameworks and Polyurethane Films
… A molecular-level understanding of the nature of gas–surface interactions is critical to the development of next generation materials for applications such as gas storage and separation, chemical sensing, catalysis, energy conversion, and protective coatings. Quartz crystal microbalance (QCM) and …
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Novel Preparation of Porous Alumina using Ice Particles as Pore-Forming Agents
… Microscopy (SEM), Archimedes measurements, and gas sorption techniques. Small spherical pores were successfully created in the 20-200?m range and larger spherical pores were also created in the 2-3 mm range. Amount of porosity was controlled through specifying the amount of ice added to the …
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Carboxylate metallogels - an adventure in supramolecular chemistry
… applications such as drug delivery, energy and gas storage, and waste water treatment. Serendipity still plays a role in gel discovery. However, with the ever growing library of gels, design is becoming a greater possibility. Interactions involved in the formation of gels are closely related to …
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Three-Way Chemoselectivity Switching through Coupled Equilibria in Complex System and Post-synthetic Modification of Cyclobenzoins
… of cyclotetrabenzoin, which may use as gas sorption materials.
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Designing Microporous Polymers for Separations
… is fabricated into a free-standing film. Pure-gas experiments are performed to explore the impact of dispersity and side chain length on gas separation performance. In Chapter 2, we evaluate the mixed-gas performance of a class of bottlebrush polymers described in Chapter 1. Gas sorption, …
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Metal-triazolate frameworks for the capture of water vapor and ammonia
… are emerging materials for applications in gas sorption and separations, however, they are widely believed to be unstable towards coordinating vapors such as water and ammonia due to often-rapid hydrolysis or substitution at the metal-ligand bond. Here, we describe a series of micro- and …
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Design of isostructural metal-imidazolate frameworks : application for gas storage
… owing to their large capacity for the adsorption of gases and their structural and chemical tunability. The ability to rationally select the framework components is expected to allow the affinity of the internal pore surface toward CO2 to be precisely controlled, facilitating materials …
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Functionalization of metal-organic frameworks with early transition metals : from fundamental studies to catalytic applications
… available, with applications ranging from gas sorption to separation to sensing to catalysis. With a large abundance of structural motifs published to date, research efforts have shifted towards further framework elaboration via post-synthetic modification (PSM), a method to alter the …
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Superoxide-assisted solid-state synthesis of birnessite type MnO2 materials: physiochemical properties and electrochemical viability
… Spectroscopy (ICP-OES), X-ray Diffraction (XRD), Gas-sorption analysis using nitrogen gas, Scanning Electron Microscopy (SEM), Thermogravimetric Analysis (TGA), and X-ray photoelectron spectroscopy (XPS). This material is then subjected to cyclic voltammetry (CV) and cyclic charge and discharge …
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