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.
Results
Showing 1 to 20 of 29 for “"Porous Ceramic"”.
-
Mechanics and Durability of Fiber Reinforced Porous Ceramic Composites
Porous ceramics and porous ceramic composites are emerging functional materials that have found numerous industrial applications, especially in energy conversion processes. They are characterized by random microstructure and high porosity. Examples are ceramic candle filters used in coal-fired …
-
Preparation and characterization of new porous ceramic filters for hot gas clean-up
The excellent particulate removal efficiency of ceramic candle filters has prompted efforts to develop a more durable and economical alternative to existing ceramic candle filters. Porous ceramic candle filter elements were successfully fabricated from calcium aluminate cement, calcined fireclay …
-
Fabrication of metal-oxide modified porous ceramic granules from aluminosilicate clay soils for defluoridation of groundwater
… clay soil with Al-oxide and fabricating porous ceramic granules using Al-oxide modified mechanochemically activated aluminosilicate clay soil/ mechanochemically activated clay soil/ corn starch and evaluating their performances in defluoridation of groundwater. The raw clay materials were …
-
The development of passive downdraught evaporative cooling systems using porous ceramic evaporators and their application in residential buildings
… through the building. The use of clay and porous ceramic in passive downdraught evaporative cooling has a track record in the vernacular architecture of hot and dry climatic regions. As part of this project, an improved design for porous ceramic evaporators has been developed for …
-
Development of analytical model relating compressive strength in porous ceramics to mercury intrusion porosimetry-derived microstructural parameters
… a classical formula representing the strength of porous ceramic materials. Here $\beta$ is an empirical constant. Hence this equation lacks the capability of relating microstructure to actual strengths, especially with regard to $\beta$. Correspondingly, this research focused on the relationship …
-
High density animal cell culture systems using porous supports
Monolithic porous ceramic and porous polystyrene microcarriers were examined as supports for large scale mammalian cell culture. Vero cells and transformed baby hamster kidney (BHK) cells which produced human transferrin were grown in three different reactor configurations: a fixed bed ceramic …
-
ΜΟΝΙΜΗ ΚΑΤΑΣΤΑΣΗ ΛΕΙΤΟΥΡΓΙΑΣ ΟΞΕΙΔΩΤΙΚΗΣ ΠΑΓΙΔΑΣ ΣΩΜΑΤΙΔΙΩΝ ΚΑΥΣΑΕΡΙΟΥ ΚΙΝΗΤΗΡΩΝ DIESEL
A MODEL SIMULATING THE BEHAVIOR OF THE POROUS CERAMIC TRAP WAS DEVELOPED. THE MODEL IS BASED ON THE ASSUMPTION THAT THE PORE SIZE OF THE TRAP COMBINED WITH THE PARTICLE SIZE DISTRIBUTION RESULTING FROM THE TRAP OXIDISING ACTIVITY DEFINES TWO AREAS OF TRAP OPERATION: (I) ACCUMULATION WHEN NO PASS …
-
Novel Preparation of Porous Alumina using Ice Particles as Pore-Forming Agents
Porous ceramics have successfully been used in a wide variety of highly advanced applications. Current routes to porous ceramics are limited in the types of porosity they can create and no one process is flexible enough to create any desired structure. This study introduces the use of ice particles …
-
Developing a low-cost ceramic micro-porous water filter for removal of microorganisms that cause common diseases
… effectively decontaminated by using a household ceramic water filter. The local production of low-cost water filters suitable for the removal of suspended material and pathogenic bacteria from water sources, especially in rural areas, provides a promising solution to the problem and is therefore …
-
Development of Stochastic and Anisotropic Multiscale Ceramics Using High Aspect Ratio Sacrificial Fillers
… a straightforward and cost-effective way to form porous ceramics. There is a specific emphasis on creating anisotropic structures via a directional ice-templating technique and hard-templating using the sacrificial filler method. Cellulose nanocrystals (CNCs) aerogels have been created via a …
-
Fabrication of porous ceramics and composites by a novel freeze casting process
Porous ceramics have been widely used in many fields. Among the fabrication techniques for porous ceramic, freeze casting has recently attracted much attention as being a versatile, low cost and environmental friendly process. In this study, alumina and Al\(_2\)O\(_3\)-ZrO\(_2\) were utilized as …
-
Fabrication SiO2 -NiO foam via replication technique for steam methane reforming catalyst at low temperatures
Porous ceramic is a type of material that has highly open and partially interconnected pores. It has a wide range of applications, which include catalyst support, filtration, adsorption and separation.The aim of this study is to fabricate Silica-Nickel Oxide (SiO2-NiO) foams in the range 70 μm to …
-
Characterizing ash properties and effects on Diesel Particulate Filter flow resistance
… efficiency and relative simplicity. The porous ceramic substrate captures the particulate matter which is comprised of combustible soot and inorganic metallic ash. While the soot can be cleared from the filter through high temperature oxidation, the small amount of ash remains in the …
-
Mashrabiya in passive cooling: Integrating Concepts of Mashrabiya into an Innovative Ceramic Evaporative Screen
… The research focuses on developing innovative ceramic screens that can function as both shading elements and efficient evaporative cooling systems. It integrates design principles from traditional Islamic screens, known as Mashrabiya. The design process builds on the environmental logic and …
-
Controlling ceramic porosity using carboxylate-alumoxane nanoparticles
… of carboxylate-alumoxanes, such as ceramic yield, particle size, pore volume, and pore diameter are dependent upon the carboxylate ligand that is substituted on the surface of the boehmite mineral. Of the synthesized alumoxanes, acetic acid-alumoxane (A-alumoxane), has the smallest …
-
Catalytic coatings for vanadium-based hydrogen membranes
… fabrication of composite Pd/V/Pd membranes on porous ceramic supports were studied to enable tubular geometries.
-
Development and testing of inorganic membranes for hydrogen separation and purification in a catalytic membrane reactor.
… Thin palladium films were deposited onto a 30 nm porous ceramic alumina support using both conventional and modified electroless plating methods. The hydrogen separation and purification behaviour of the membranes were investigated, including the effect of annealing at higher temperatures. Gas …
-
Study on specifics of thermalhydraulics and neutronics of pressure-channel supercritical water-cooled reactors (SCWRs)
… 3-batch refueling, 336 vertical fuel channels, a porous ceramic insulator inside the pressure tube, and stainless-steel cladding. The reactor operates at a pressure of 25 MPa with the coolant temperature rising from 350 to 625°C. Consequently, sheath and fuel centerline temperatures are …
-
Interactions of the Air Electrode with Electrolyte and Interconnect in Solid Oxide Cells
… and lifetime. The interactions between the ceramic electrolyte, porous ceramic air electrode, and metallic interconnect materials — including solid state interfacial reactions and vaporization/deposition of some volatile elements — have been investigated in the simulated SOC operating …
-
The development of a direct reading relative humidity instrument
… indicated that the electric hygrometer with a ceramic element was a good basic theory for a humidity instrument, but still required development before it,would be of any practical use. The second objective - development of a useful hygrometer - was directed towards the development of the …
Page 1 of 2