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 15 of 15 for “"Novel Catalyst"”.
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Investigations on hydrodesulfurization reactions using slurry catalysts and supercritical water
… technologies severely suffer from catalyst deactivation, coking and plugging as a result of high asphaltenes, heavy metals, and Conradson Carbon present in the viscous vacuum residue. Slurry phase hydrodesulfurization presents potentials for overcoming some of these downsides by …
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Coordinative Chain-Transfer Polymerization of Ethylene with NCN-Ligand Stabilized Complexes of Titanium and Zirconium
Content of the present work is the development of novel group IV transition metal based catalyst systems which are able to polymerize ethylene in a highly controlled and efficient fashion. Besides synthesis and complete characterization of the ligands and complexes, these novel catalyst systems …
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Computational Fluid Dynamics of High Temperature Shift Reaction of Reformate Gas in Fixed Bed and Membrane Reactors
… to the traditional WGS approach. The use of a novel catalyst that combats the limitations of the traditional WGS catalyst is necessary to further cut down costs and improve the overall process efficiency. Such a novel catalyst (3Ni5Cu/Ce0.5Zr0.33Ca0.17) was developed in a previous experimental …
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Electrochemical analysis of photoelectro-, electro-, and thermal catalysis towards more efficient hydrogen peroxide production
… the industrial scale due to a lack of effective catalysts. Explored here are alternative H2O2 production methods involving the 2-electron reduction of O2. Specifically, photoelectrochemical, electrocatalytic, and thermal catalytic methods are investigated further to draw out necessary catalyst …
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Evaluation of TiO2 as a Pt-Catalyst Support in a Direct Ethanol Fuel Cell
… of ethanol. Difficulties lie in finding a catalyst that can completely oxidize ethanol and resist poisoning by intermediate reaction species. Degradation of the catalyst layer over time is also an issue that needs to be addressed. In this work, niobium doped-titanium dioxide (Nb-TiO2) is …
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Preparation and characterisation of inorganic nanostructured support materials for polymer electrolyte fuel cells
… 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 needs to be paid to the …
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Structural Design and Analysis for a DeNOₓ Catalyst in Aviation
… exhaust stream, then passing the flow through a catalyst. This device facilitates reactions between the dosed exhaust flow and catalyst wall to create harmless N₂ and H₂O at the cost of lost engine efficiency due to adding back pressure to the engine system. In prior work, a “pleated filter” …
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Spectroscopic Studies and Reaction Mechanisms of Small Molecule Oxidation over Metal Oxide-Supported Catalysts
… the chemical transformations that take place on novel decontaminating materials. Additionally, a fundamental understanding of reaction mechanisms that occur on novel material surfaces is required before improved materials can be developed. To this end, the oxidation of three simpler, smaller …
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Development and execution of selection methods for lysine-acylating deoxyribozymes
This Thesis was approved for publication on 2022-04-29 at 11:20.
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Catalytic reduction of nitric oxide by solid carbonaceous material under lean condition
… and soot from Diesel exhaust over Cu containing catalysts can significantly reduce soot and NO_x emissions while producing N_2 and CO_2. The author has evaluated the performance of Cu ion exchanged ZSM-5 and Cu adsorbed on Granulated Activated Carbon (Cu-GAC) using GAC as a surrogate for soot in …
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Nanocomposite catalysts for soot combustion and propane steam reforming
… complete carbon black combustion by 400*C. This novel catalyst has excellent potential for application in the emission control of soot particulates generated by diesel engines. In this work, CuO was coated onto nanocrystalline supports, such as alumina, ceria, zirconia and titania. The best …
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DISINFECTION USING A NOVEL HETEROGENEOUS CATALYST
… of this work to investigate the potential of a novel catalyst in activating H2O2 so as to reduce the concentration of H2O2 used and the time taken for disinfection. The antimicrobial properties of an iron based novel heterogeneous polyacrylonitrile catalyst (PCat) were examined against …
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Enhancing chemoselectivity and predicting site-selectivity in manganese catalyzed C–H oxidation
… achieve high chemoselectivity. Additionally, a novel catalyst, Mn(MeCF₃-PDP), was developed, demonstrating superior performance in oxidizing complex natural products compared to the previous catalyst Mn(CF₃-PDP), in terms of yield and mass balance due to steric restrictions in the catalyst …
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Development and Scale-up Production of a Novel Fibrous Catalyst and Application for Removal of Endocrine Disrupting Compounds
… range of organic pollutants. In this work, a novel catalyst underwent development for scale-up commercial production and tested for oxidative treatment of contaminants in water. In this work the existing modification process of polyacrylonitrile yarn to create the heterogeneous PAN catalyst …