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 31 for “"Porous Metal"”.
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Modelling of solidification of porous metal-hydrogen alloys
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1995.
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Development of porous metal-organic frameworks for gas adsorption applications
Metal-organic frameworks are a new class of porous materials that have potential applications in gas storage, separations, catalysis, sensors, non-linear optics, displays and electroluminescent devices. They are synthesized in a "building-block" approach by self-assembly of metal or metal-oxide …
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Porous metal-organic frameworks for sorption of volatile organic compounds
Metal-organic frameworks (MOFs) present potential for various applications such as gas sorption, gas storage, sensing, drug delivery, and catalysis. This attracts researchers to design and synthesize MOFs that can respond to a specific application. In this thesis, mixed ligands 34pba and 44pba …
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Fabrication and characterization of porous metal emitters for electrospray applications
… as low as 500 [mu]m have been fabricated out of porous tungsten and preliminary tests show that dense two-dimensional emitter arrays can be fabricated with emitter separations down to 300[mu]m. Experimental research that was conducted to characterize emitter array performance is also presented. …
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Fabrication of porous metal oxides for catalytic application using templating techniques
… werden müssen. In dieser Arbeit wurden poröse Metalloxid-Kügelchen hergestellt, die aus einem Gemisch aus Titanoxid und entweder Aluminium-, Gallium- oder Indiumoxid bestehen. Als Template wurden poröse Kunststoffkügelchen eingesetzt, die man sonst für Chromatographiezwecke braucht. Bei der …
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Strengthening porous metal skeletons by metal deposition from a nanoparticle dispersion
… achieve wide application in direct production of metal parts. This work seeks to reduce sintering and deformation of porous metal skeletons during liquid-metal infiltration by reinforcing the skeletons with metal deposits. This can be accomplished by depositing a metal from a suspension of …
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Investigating the Single Crystal to Single Crystal Transformations of Highly Porous Metal-Organic Frameworks Through the Crystalline Sponge Method
… in order to regularly order guest compounds in a porous media. The structural stability of the molecular sponges, which are highly porous metal-organic frameworks (MOFs), is first investigated, revealing that the Co-based MOF, 1, undergoes two remarkable transformations. This thesis also …
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CFD Modeling and Optimization Analysis of Thermal Energy Storage Based Solar Collectors
… by impregnation of high thermal conductive porous metal to the PCM. To demonstrate the viability of the proposed approach, experimental analysis is carried out. The proposed system has reported maximum thermal efficiency of 71.71% while the conventional system showed maximum thermal …
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Nanoporosity Formation in Ag-Au Alloys
… process which leads to the formation of a porous metal "sponge" with a porosity that is completely interconnected and random in direction. Nanoporous metals are desirable since they have larger surface areas than an equal volume of non-porous material. Because of their enormous surface area …
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Poly(dimethylsiloxane)-Based Microfluidic Electrochemical Devices
… fuel cells incorporating high surface area/porous metal and metal alloy electrodes that are embedded and fully immersed in liquid electrolyte confined in the channels of a PDMS-based microfluidic network. A hydrogen-air fuel cell of the latter design exhibits exceptional durability and high …
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Expanding the Portfolio of Additive Manufacturing Capabilities through Advanced Processing Techniques
… and rapid thermal cycles seen in beam-based metal AM are common causes of solidification cracking and anisotropic mechanical properties. Various studies have shown approaches to address the processing defects and material anisotropy in powder-based AM, such as creating AM-specific alloy …
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Design of a small-scale continuous linear motion pharmaceutical filtration module
… motor to filter the API mixture through a porous metal filter. The mixture enters into the middle of the filtration unit; the excess ethyl acetate and dissolved contaminants are pulled through the filter by a vacuum pump, leaving the desired API molecules on the filter surface. The API is …
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Investigation of layer-by-layer assembly and M13 bacteriophage nanowires for dye-sensitized solar cells
… and polymeric components. The resulting mesoporous polymer films can be used as a template for the construction of the titania photoanode of dye sensitized solar cells (DSSCs) with a novel nanowire architecture to enhance electron transport. The biotemplated nanowires are shown to …
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Convection and Flow Boiling in Microgaps and Porous Foam Coolers
… and two-phase heat transfer and pressure drop of porous metal foam which can enhance the cooling capability of low conductive fluid are studied and compared with the performance of the open channel microgap cooler in terms of volumetric heat transfer rate and required pumping power. The …
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Salts as highly diverse porogens : functional ionic liquid-derived carbons and carbon-based composites for energy-related applications
… alternative synthesis strategy toward highly porous functional carbons with tunable porosity using ordinary salts as porogen (denoted as “salt templating”) 2)The one-pot synthesis of porous metal nitride containing functional carbon composites 3)The combination of both approaches, enabling the …
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Bimetallic Catalyst for Lignin Depolymerization
… from lignin depolymerization. Heterogeneous metal catalysis is an ideal solution for improving lignin depolymerization process performance by promoting more selective reactions under lower energy input. Among different kinds of catalytic systems, a copper-doped porous metal catalyst has been …
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Development of Cellulose-Titanium dioxide-Porphyrin Nanocomposite Films with High-barrier, UV-blocking, and Visible Light-Responsive Antimicrobial Features
… has been a growing interest in employing ultra-porous metal-organic frameworks (MOF) with visible light-responsive antibacterial mechanisms to generate reactive oxygen species (ROS) that can eliminate bacteria via an oxidative burst. MOF is made of inorganic metal ions/nodes/clusters/secondary …
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Feasibility study of a hybrid passive/active noise absorption system
… with the polyurethane foam replaced by a porous metal sheet, commercial name FELTMETAL®. The result of this investigation showed an improvement in the absorption property of the FELTMETAL, opening a number of potential applications for the Passive/Active system by using different absorbing …
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Scalable Micro/Nanostructured Surfaces for Thin-Film Condensation Heat Transfer Enhancement in Steam Power Plants
… can be achieved by sandwiching a thin layer of porous metal wick between a hydrophobic membrane and the condenser surface to confine the condensed liquid, forming a thin liquid-metal composite film that significantly improves the effective thermal conductivity of the condensate-filled porous …
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