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 95 for “"Agglomerate"”.
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Aerosol Filtration -- Agglomerate Particle Filtration and Particle Deposition Uniformity
… these two assumptions are not always met. Agglomerate particles with non-spherical shape are ubiquitous in industrial processing and ambient environment, and non-uniform particle depositions are often met. The overall objective of this dissertation is to advance our current knowledge on …
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Mathematical modelling of agglomerate scale phenomena in heap bioleaching
… development of an intermediate (or meso-) scale "agglomerate" model. The agglomerate is defined as a unit volume of a heap that comprises a solid phase (a size distribution of ore particles), a liquid phase (stagnant and flowing leaching solution, which contains dissolved solutes, attached and …
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The role of skilled labor pool in driving firms to agglomerate: an empirical study on China's policy experiment
This study aims to empirically identify agglomeration forces operating through skilled labor mobility. Specifically, this research uses a natural experiment in China regarding to skilled labor migration liberalization to examine the impact of skilled labor pool and knowledge availability on China’s …
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Nanomaterialien als Fließregulierungsmittel
… als nicht aussagekräftig. Vielmehr werden die Agglomerate eines Nanomaterials wie künstliche Rauigkeiten an die Oberfläche des Trägermaterials adsorbiert. Die Arbeitshypothese konnte dadurch bestätigt werden: Die Reduktion der Zugspannung ist allein von zwei Faktoren abhängig: von der Größe der …
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A Microscopic Continuum Model of a Proton Exchange Membrane Fuel Cell Electrode Catalyst Layer
… 2-dimensional axisymmetric Thin Film and Agglomerate Models of Bultel, Ozil, and Durand [8] were initially implemented, validated, and used to generate various results related to the performance of the active layer with changes in the thermodynamic conditions and geometry. The Agglomerate …
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Gas fluidization of nanoparticles
… on the gas fluidization of various nanoparticle agglomerates. Firstly, the gas fluidization characteristics and regime classifications without any additional external force fields are identified using both experimental measurements and modeling. Secondly, the effect of introducing certain …
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Charge Interaction Effects in Epoxy with Cation Exchanged Montmorillonite Clay and Carbon Nanotubes.
… montmorillonite clay were found to form agglomerates near a critical concentration. Using differential scanning calorimetry it was determined that the mixing temperature of the epoxy + MLS mixture prior to the addition of the curing agent critically influenced the formation of the …
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EXPERIMENTAL AND MODELING STUDIES OF COLLOIDAL SUSPENSION STABILITY OF HIGH-DENSITY PARTICLES IN AQUEOUS SOLUTIONS
… their interparticle forces. If the particles agglomerate, the sizes of the resulting agglomerated particles increase, increasing the sedimentation (or creaming) rate, and the suspensions can become unstable. In certain coating processes, preventing the agglomeration of dispersed particles is …
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Numerical simulation of mechanofusion system for dry particle coating process
… and micro scale to study the degradation of agglomerates prior to the dry particle coating process. The system-scale simulation is based on a mono-dispersed system where only host particles are taken into consideration. The particles are assumed to be frictional, elastic-plastic spheres. A …
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Detailed Investigations of Capillary and van der Waals Forces in the Adhesion between Solids
… impact on how solids flow, stick to surfaces, agglomerate and break; therefore, understanding their behavior can lead to better processing techniques.
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Enhanced fluidization of nanoparticle agglomerates
Gas fluidization of nanoparticle agglomerates has recently received much attention due to the excellent way in which these novel nanornaterials can be dispersed in a gaseous medium. Nanopowders have a very high surface area to volume ratio which allows them have unique chemical and physical …
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Investigating the redispersibility of calcium carbonate
… tests and compressive load tests to obtain agglomerate strengths. The particle size distributions and rheological properties are strongly correlated as an increased number of free fine particles increased the viscosity due to more interparticulate interactions. The removal of the organic …
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Experimental and theoretical examination of the chemical kinetics of a pollutant coating on porous particles
… suspension was sprayed into the chamber. Fine agglomerates were formed during the spaying with mean diameter approximately 1 µm. The precursors for the production of hydroxyl radicals were either reacting mixtures of hydrazine and ozone in absence of light source or photolysis of methylntrite. …
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Transformação do espaço urbano na comunidade Saturnino de Brito em João Pessoa - PB.
… It is in this environment of exclusion that the agglomerate Saturnino de Brito in João Pessoa in the State of Paraíba, as a result of the segregation dynamics of capital. The agglomerate is part of arising from an attribute. The community has existed for more than 50 years and problems that are …
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Mixing of nanosize particles by magnetically assisted impaction techniques
… area, nano-particles form very large, fractal agglomerates. The structure of these agglomerates can have a large agglomerate composed of subagglomerates (SA), which itself consists of primary agglomerates (PA), that contain chain or net like nano-particle structures; typically sub-micron size. …
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Agglomeration of Bed Particles in Low-Temperature Black Liquor Gasification
… bed. The particles will stick together, agglomerate, at temperatures much lower than their melting temperature. The strength of these bonds and the temperature at which the bed agglomerates were studied as well as the effect of particle size on the heat transfer coefficient from the …
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Composite propellant combustion with low aluminum agglomeration
… systems show that with CAP present, Al can agglomerate more extensively on CAP via lateral surface migration from fuel matrix to the CAP region. The particulate CAP system also shows that Al can accumulate/agglomerate via settling on CAP from above (in the direction of burning). Both …
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Untersuchung der Wirkungsweise von Nanomaterialien
… gezeigt werden , dass die in den Nanomaterial-Agglomeraten auftertenden Wechselwirkungen, die Größe der Agglomerate und deren Adsorptionsrate die bestimmenden Faktoren der Fließeigenschaft von Pulvern sind.
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Numerical simulation of multi-scale transport processes and reactions in pem fuel cells using two-phase models
… layer has been modeled using the microscale agglomerate approach where diffusion of oxygen into the agglomerate structure was used to model the reaction rates. For comparison of the PEM fuel cell performance, detailed study was performed at load conditions of current densities of 0.22, 0.57 …
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Mechanical integrity and rehydration properties of agglomerated nutritional dairy ingredient powders
… thesis explore the importance of maintaining agglomerate integrity on powder handling (i.e., powder conveying) post-spray drying, while presenting novel research findings in the application of agglomeration for the modification of commercially important, high-protein content dairy powders …
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