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 1422 for “"Reactors"”.
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Electrochemical Packed Bed Reactors
Made available in DSpace on 2014-12-13T18:55:32Z (GMT). No. of bitstreams: 1 7624150.pdf: 5329964 bytes, checksum: 5fc4b35ef9bbc2df36b3b2cdbab9bb37 (MD5) Previous issue date: 1976
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Polymerization in emulsion microdroplet reactors
… is to utilize emulsion droplets as chemical reactors for execution of complex polymerization chemistries to develop unique and functional particle materials. Emulsions are dispersions of immiscible fluids where one fluid usually exists in the form of drops. Not surprisingly, if a …
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Exclusions Zones for Small Modular Reactors
The objective of this thesis is to estimate the size of the exclusion zone around a small modular reactor (SMR). The aim of such zone is to provide an atmospheric space sufficient to dilute any radioactive releases during an accident, to a level below the safe regulated radiation dose for the …
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Multiphysics modeling in ARC-class reactors
L'abstract è presente nell'allegato / the abstract is in the attachment
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Mixing in high throughput experimentation reactors
… time that are needed in conventional lab scale reactors. However their small sizes (~ 15-250 ml) contribute to a low Reynolds Number, Re, which results in poor mixing efficiencies. Together with unconventional geometries, i.e. lack of baffles and simple impeller designs, their fundamentals are …
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Predicting Transitions in Fischer-Tropsch Reactors
… deactivation. This work focuses particularly on reactors with a titania-supported cobalt catalyst. One part of this project is an investigation using VASP studying the adsorption and mobility of several cobalt species that might form on the TiO2 support surface. It is found that reactor species …
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High temperature concrete for nuclear reactors
This dissertation investigates the response of concrete to high temperatures for extended periods, such as those that may be experienced in a normally operating nuclear reactor.
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MCNP4B modeling of pebble-bed reactors
… MCNP4B to the neutronic modeling of pebblebed reactors was investigated. A modeling methodology was developed based on an analysis of critical experiments carried out at the HTR-PROTIEUS and ASTRA facilities, and the critical loading of the HTR-10 reactor. A body-centred cubic lattice of …
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Actinide minimization using pressurized water reactors
Transuranic actinides dominate the long-term radiotoxity in spent LWR fuel. In an open fuel cycle, they impose a long-term burden on geologic repositories. Transmuting these materials in reactor systems is one way to ease the long-term burden on the repository. Examining the maximum possible …
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Staff minimization strategy for micro-reactors
… opportunity to bring the concept of very small reactors with a flexible purpose from the ideation phase to commercialization, and potentially transform the energy sector for decades to come. Modern materials and instrumentation and controls can support the development of compact and reliable …
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Microfabricated reactors for partial oxidation reactions
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1998.
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Conversion ratios for plutonium recycle in light water reactors: breeding potential in D₂O-H₂O cooled reactors
The conversion properties of close packed, water cooled, plutonium fueled lattices are studied. Lattices with both ordinary water and light-heavy water mixtures are considered. The effects of volume fractions, plutonium concentrations, and heavy water fraction on the neutronics are studied through …
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Nonlinear analysis and control of chemical reactors
… is useful for modeling and controlling chemical reactors. The motivation for this work originates from a few reports which have demonstrated in the past that the nonlinear spectral method offers a useful mathematical framework for classifying and quantifying nonlinear complexities of large …
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Accelerating the Commercial Implementation of Electromethanogenic Reactors
… adoption. In contrast, electromethanogenic reactors offer a next-generation solution: scalable, decentralised systems that couple wastewater treatment with direct methane production through bioelectrochemical processes. Accelerating their commercial deployment can empower businesses to …
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Decommissioning considerations for molten salt type reactors
Molten salt type small modular reactors are presently being developed as an option for providing electricity and alternative energy forms. The current proposed designs do not document how decommissioning will be addressed. The decontamination activities necessary for these reactor technologies upon …
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Denitrification Under Salinity Stress in Biofilm Reactors
… performance under salinity inhibition, biofilm reactors could represent an elegant strategy, but a systematic analysis focusing on the reactor system under salinity stress is needed for their optimisation. Moreover, since the electron donors available for the process may vary, the comparison …
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Advanced oxidative wastewater treatment using cavitational reactors
… of acoustic and hydrodynamic cavitational reactors. There have been many reports in the literature on the use of hydroxyl radicals as the core part of AOPs and hence, as the first objective, the amount of hydroxyl radical generation from different acoustic and hydrodynamic cavitational …
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Modeling for anaerobic fixed-bed biofilm reactors
… aspects of the anaerobic fixed-bed biofilm reactors. In order to investigate the mechanism of equilibrium in an anaerobic biofilm reactor, a non-equilibrium model was derived from the equilibrium model to simulate the gas transfer process involved in biogas production. The equilibrium model …
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