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 22 for “"catalyst development"”.
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Industrial Ni-Based Catalyst Development for Carbon Dioxide Reforming of Methane
… Ni and Co monometallic and Ni-Co bimetallic catalysts were prepared by using both co-precipitation and impregnation methods. Cylindrical and spherical shaped catalysts were made using the Ni-Co bimetallic catalyst with and without the addition of Boehmite as the binding material. The shaped …
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High throughput experimentation: a validation study for use in catalyst development
… reproducibility and variance in high throughput catalyst preparation and testing was determined and the use of parallel experimentation was demonstrated within a catalyst development study. The high throughput equipment was used for catalyst development studies for fuel processing, the production …
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Development of a catalytic enantioselective intramolecular Stetter reaction: catalyst development and synthetic applications
… into a pendant electron-deficient olefin. The development of chiral bicyclic nucleophilic carbene catalysts has allowed for increased efficiency and selectivity in this reaction, as well as an overall broadening of its synthetic utility. The highly stereoselective formation of five- and …
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Heterogeneous and Monolithic Catalyst Development for the Biodiesel Production Process & Evaluation of Static Mixers for the Esterification Process
… sulphuric acid are the conventional homogeneous catalysts used, in spite of their drawbacks, such as soap formation with high free fatty acid (FFA) feedstocks, substantial wastewater generation, issues with the downstream separation process, and corrosion of process equipment. Both of the …
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I. Catalyst development in asymmetric phase transfer catalysis employing QSAR methods II. Computational investigations on the stereochemical course of the addition of allylsilanes to aldehydes
… nitroalkenes serves as the key transformation.. Catalyst activity and selectivity are rationalized in a qualitative way based on the effective positive potential of the ammonium ion. The next stage involved the development of quantitative structure -selectivity relationships (QSSR) for the …
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Analysis and Chemical Applications of Metal–Metal Bonds and Large Language Models
… regression. These models enabled predictive catalyst development using earth–abundant metals, offering new insight into cooperative bond activation mechanisms. Beyond molecular systems, this study also explores how artificial intelligence can support chemical practice. Large language models …
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Application of Concurrent Development Practices to Petrochemical Equipment Design
Principles of concurrent development are applied to the design of a small-scale device for converting natural gas or liquefied petroleum gas into hydrogen. The small hydrogen generator is intended for serial production for application in the production of industrial hydrogen, fueling stationary …
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Ruthenium and Cobalt Catalysts for Hydrogen Production from Ammonia
… avoid NOx formation. Currently, the benchmark catalyst for ammonia cracking is ruthenium supported on carbon nanotubes (CNT). Future catalyst development requires a departure from trial-and-error catalyst discovery. This thesis presents a new method for the synthesis of catalysts with precise …
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Computational and Data-Driven Design of Perturbed Metal Sites for Catalytic Transformations
… design and discovery of metal based catalysts. Firstly, we develop theoretical frameworks for predicting electronic descriptors of transition and noble metal alloys, including a physics model of d-band center, and a tight-binding theory of d-band moments to systematically elucidate …
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Microchemical systems for kinetic studies of catalytic processes
… microfluidics, microfabrication has enabled the development of microchemical systems for a variety of chemical and biological applications. This work focuses on the development of these systems for improved gas phase heterogeneous catalysis research. The catalyst development process often …
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Mechanistic studies on metal-catalyzed carbon-nitrogen bond forming reactions
… versatile in the presence of Cu(I)/1,2- cliamine catalyst systems. The results provide insights into the role of 1,2-diamines in modulating the coordination environment around Cu(I). The catalyst is more efficient at high concentrations of 1,2-diamine and high concentrations of amide, as revealed …
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Computationally-Derived Design Principles for Water Oxidation Catalysts
… to produce renewable solar fuels, but efficient catalysts need to be discovered to enable its use at the industrial scale. The most active known water oxidation catalysts (WOCs) follow a common theme in chemical catalysis, relying on rare metals such as ruthenium and iridium. To discover …
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Rapid screening of PEM FC cathode catalysts
One of the major bottlenecks in catalyst development for proton exchange membrane fuel cell (PEMFC) is the lack of fast high-throughput testing methods. Fast screening techniques enable a large number of catalysts to be tested in a relatively short time under the same conditions.<br/><br/>This …
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Group 10 Metal Catalytic Olefin Polymerization and Synthesis of Ethylene/Acrylate Block Copolymers
… focuses on developing group 10 metal catalysts for olefin polymerization and synthesis of ethylene/acrylates block copolymers. The distorted sandwich α-diimine Pd catalyst development exhibited high catalytic activity and living ethylene polymerization at low-pressure conditions. The …
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Ceramic Microreactors for on-Site Hydrogen Production
The development of microreactors has been growing rapidly in recent years. The advantages of using microreactors over macroscale reactors make them useful for various applications, including catalyst development and optimization, on-site synthesis of hazardous chemicals and reactive intermediates, …
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Design and characterization of advanced battery technologies and mechanistic studies of the oxygen reduction reaction for fuel cells
… remains elusive, thereby obfuscating rational catalyst design. This work describes the development of a unique electrochemical platform called a hybrid bilayer membrane that enables the kinetics of proton transfer to an O2 reduction catalyst to be controlled. The insight gained from this novel …
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Atom-by-atom designs of metal oxide catalysts for the oxygen evolution reaction
… kinetics and a lack of efficient artificial catalysts. In contrast, enzymes such as photosystem II exhibit high efficiency in performing this reaction, a result of millions of years of biological evolution. Thus, the goal of this research is to design optimal metal oxide catalysts for OER …
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Electrochemical and spectroscopic insights into the electroreduction of carbon dioxide to value added chemicals
… several methods to develop the porous and active catalysts for CO2 electroreduction and focuses on interrogating the electrocatalytic mechanisms for the CO2 conversion reaction through spectrochemical studies. Chapter 2 reports several high surface area Cu-based catalysts, prepared by the …
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NMR Studies of Emulsions in Porous Media and Applications to Fischer-Tropsch Synthesis
… in Q-silica beads as well as in Ru-based FT catalyst pellets. Subsequently, the influence of (i) temperature, (ii) pore size, (iii) surfactant and (iv) surface modification on emulsion formation was investigated. Little impact of temperature and pore size was found for the ranges studied. …
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Development and Applications of Pd Catalysts for C-N Cross-Coupling Reactions
… 1 A procedure for forming a highly active Pd(0) catalyst from Pd(OAc) 2, water, and biarylphosphine ligands has been developed. This protocol generates a catalyst system, which exhibits excellent reactivity and efficiency in the coupling of a variety of amides and anilines with aryl chlorides. …
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