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 56 for “"Support Material"”.
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3D printing dissolvable support material for time-dependent mechanisms
… a novel approach to the use of dissolvable material is proposed: rather than 3D printing support structures strictly for supporting overhangs, we explore use cases derived from its ability to be dissolved when placed in a solvent, such as water. This enables a range of new use cases, such as …
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MAX phases as an electrocatalyst support material: a DFT study
… However, the currently used catalyst support material, carbon black, corrodes in the low pH and oxidative environment. Therefore, new catalyst support materials are being sought. A new class of material, called MAX phases, shows potential because some possess a combination of …
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Choral unit standards and support material for primary schools in South Africa
Please read the abstract in the section 00front of this document
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Ti3C2Tx as an Advanced Support Material for Polymer Electrolyte Fuel Cell Catalysts to Facilitate the Oxygen Reduction Reaction
… to find a more active but primarily more durable support for the oxygen reduction reaction (ORR) in a PEFC than the currently employed carbonaceous support was therefore undertaken. A MXene, Ti3AlC2 was selected for assessment based on its theoretically suitable electrical and thermal …
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Enhancing the Capabilities of Large-Format Additive Manufacturing Through Robotic Deposition and Novel Processes
… the capabilities of large-format, polymer material extrusion, additive manufacturing (AM) systems. Specifically, the aims of this research are to (1) Construct, and develop a robust workflow for, a large-format, robotic, AM system; (2) Develop an algorithm for determining and relaying …
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Metal-support interactions on Fe-based Fischer-Tropsch catalysts
‘Metal support interactions’ is a term used to describe a phenomenon whereby the interaction between the active metal and the support material is strong enough to affect the catalytic activity and selectivity of the active phase. Primarily, there are two theories described in literature to explain …
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Design for Additive Manufacturing Considering Optimization of Part Topology and Build Orientation
… to new design challenges such as the need for support structures that are influenced by part topology and build orientation. Reducing support structures will limit manufacturing time and cost, allowing industry to further utilize the benefits of topology optimization. Previous works addressing …
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Georgia's Literary Heritage: An Illustrated Literary Map of Georgia
… information should provide teachers with support material for a study of Georgia's literature.</p>
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Material feedback in digital design tools
How do design tools feedback material behavior to the designer? Digital design tools in use by designers today provide a rich environment for design of form but offer little feedback of the material that ultimately realize that form. This lack of materialism limits the value of the design tool and …
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Kinetics of ketone hydrogenation over supported Ru catalysts
… phase hydrogenation of levulinic acid (LA) over supported Ru catalysts was carried out, in order to understand how to better design a hydrogenation catalyst for such biomass catalytic strategies. At temperatures representative of biomass processing, the reaction proceeds first through the …
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The use of hydrotalcite derived catalyst precursors in the Fischer-Tropsch synthesis
… small catalyst particles well dispersed on a support material [Augustine, 1996]. Supporting the iron metal used in the HTFT process onto a basic support should eliminate the problem associated with supported iron catalysts namely, the effect of "alkali dilution" caused by the migration of the …
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Preparation and characterisation of inorganic nanostructured support materials for polymer electrolyte fuel cells
… high costs associated with the current carbon supported platinum (Pt/C) catalysts. Carbon support corrosion and Pt dissolution/aggregation on the catalyst layer within the fuel cell have been confirmed as the major contributors to the degradation of the Pt/C (Shao, et al., 2007). Attention …
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A Numerical Model for Thermal Effects in a Microwave Irradiated Catalyst Bed
… catalyst particles attached to a ceramic support through microwave irradiation. This analysis is incorporated into a macroscopic heat transfer model of a packed and fluidized catalyst bed heated by a microwave field to predict thermal effects associated with selective heating of the …
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Effects of Crystallite size and water partial pressure on the activity and selectivity of low temperature iron-based fischer-tropsch catalysts
… and characterisation of a model alumina supported iron catalyst with iron crystallites in the nano-meter range between 2 and 16 nm. Secondly, Fischer-Tropsch testing in a fixed bed reactor of model catalyst systems, testing the effect of differing crystallite size on the activity and …
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Catalytic Transformation of Greenhouse Gases in a Membrane Reactor
Supported Ni and Rh catalysts were developed for the reforming of two greenhouse gases, methane and carbon dioxide to syngas (a mixture of hydrogen and carbon monoxide). This is an endothermic, equilibrium limited reaction. To overcome the thermodynamic limitations, a commercially available porous …
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Supramolecular Nanostructures as Support Materials for Gold Nanoparticle Catalysts
… metal oxides being the most commonly employed support material for AuNPs. However, metal oxides are challenging to evenly distribute in solution and intrinsically difficult to modify. Molecular self-assembly provides a novel route to synthesize AuNP support materials, offering precise control …
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Rotary bed reactor for chemical-looping combustion with carbon capture
… coated on the inner surface of the channels. The support material is boron nitride which has high specific heat and thermal conductivity. Gas flows through the reactor at elevated pressure and it is heated from 823K to 1245K by fuel combustion. The rotary reactor design for a thermal capacity of …
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Geotechnical characterization of coal refuse for use as a backfill material
… disposal, provided the refuse is a suitable fill material. A Iiterature review has been made of the various backfilling practices and stowing materials that have been used in both underground hardrock and coal mines. The mechanics of fill support were also reviewed, as well as how the physical …
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Multi-Axis Material Extrusion Additive Manufacturing of Continuous Carbon Fiber Composites
Material extrusion is a common form of 3D printing that has historically been limited to producing prototypes, models, and low load-bearing parts. This is primarily because parts are manufactured layer-by-layer, resulting in poor adhesion along the build direction, and machines struggle to print …
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Synthesis and Catalytic Applications of Ni-Based Single-Atom and Nanoparticle Catalysts Supported on UiO-66-NH2
… CO₂ adsorption capacity. Using it as a catalyst support for CO₂ conversion represents a promising approach. Nickel was employed as the catalytic metal in this study, and two distinct strategies were attempted to introduce it into UiO-66-NH2: ionic and cluster forms. The resulting catalysts, …
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