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 17 of 17 for “"catalyst properties"”.
-
Break-in behavior of a tungsten oxide on silica catalyst during propylene disproportionation
… break-in behavior of a tungsten oxide on silica catalyst during propylene disproportionation. A catalyst of 10 percent WO3 on silica gel (223 square meters per gram B.E.T. surface area) was used in a microcatalytic reactor. During the initial contacting of freshly activated samples of this …
-
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 …
-
Reactivity and Structure of Supported Nickel Phosphides (Ni₂P) in Deep Hydrodesulfurization Catalysis
… preparation and characterization of Ni₂P catalysts and their application in deep hydrodesulfurization (HDS) of a model sulfur compound, 4,6-dimethyldibenzothiophene (4,6-DMDBT), one of the most refractory S-compounds. This topic is of great importance in addressing recently enacted …
-
Utilizing viruses to probe the material process - structure - property relationship : controlling catalytic properties via protein engineering and nanoscale synthesis
… a non-petrochemical based energy infrastructure, catalysts play an important role in meeting the increasing energy and consumable demands of today without compromising the global health of tomorrow. Development of these catalysts relies on the fundamental understanding of the effects individual …
-
Mechanistic and spectroscopic methods for identifying reactive intermediate structures and active site properties over metals, metal oxides, and metal phosphides
… understanding of reaction mechanisms and catalyst properties in order to improve the design of highly selective, reactive, cost effective, and stable catalysts. In situ characterization methods provide the ability to correlate different catalyst properties (e.g., surface acidity, …
-
Synthesis, characterisation, and evaluation of supported cobalt molybdenum nitride for Fischer-Tropsch reaction
… including synthetic fuel depending on the catalysts and operating conditions. Australia has 25% of world's natural gas resources hence Australia's crude oil dependency can be reduced extensively by developing catalysts that will facilitate the technique of converting natural gas to …
-
Poisoning and Sulfation on Vanadia SCR Catalyst
… of titania-supported vanadia commercial SCR catalysts exposed to flue gases from both coal and coal-biomass co-firing boilers were investigated. BET surface area and average pore diameter measurements on both fresh and exposed commercial catalyst samples indicated pore plugging occurred to …
-
Diversity oriented, computer guided catalyst design: Application of chemoinformatics to catalysis
… of a diversity oriented, computer guided catalyst optimization chemoinformatic workflow. This process seeks to combine the power of chemoinformatic diversity analysis and QSAR modeling with diversity and discovery oriented synthesis to rapidly and efficiently design active and selective …
-
Relation between surface structural and chemical properties of platinum nanoparticles and their catalytic activity in the decomposition of hydrogen peroxide
… H₂O and molecular O₂ catalyzed by platinum nanocatalysts is technologically very important in several energy conversion technologies, such as steam propellant thrust applications and hydrogen fuel cells. However, the mechanism of H₂O₂ decomposition on platinum has been unresolved for more than …
-
Toward Designing Active ORR Catalysts via Interpretable and Explainable Machine Learning
… for researchers in catalysis is to find catalysts that are electrochemically efficient to drive the reaction, made of earth-abundant elements to lower material costs and allow scalability, and stable to make them last longer. The majority of commercial catalysts that are now being used …
-
Beyond net-zero carbon emissions in industrial processes through catalyst-aided amine solvents for the indirect co-combustion of natural gas and biomass
… thesis investigates the application of absorber catalysts developed and optimized for effective CO₂ capture in a power production process involving the indirect co-combustion of biomass and natural gas, addressing a crucial case study challenge of carbon emissions from large. By employing a novel …
-
Development and validation of a computational model for a proton exchange membrane fuel cell
… and release within the polymer portion of the catalyst layers, and liquid water production and transport. Both two-dimensional and three-dimensional geometries are modeled. For a given geometry, the governing differential equations are solved over a single computational domain. For the …
-
Evaluation of alkali and alkaline earth doped samarium oxide catalysts for the oxidative coupling of methane
… to 900°C) in the presence of a solid metal oxide catalyst to produce the desirable products, ethane and ethylene, as well as the undesirable products, carbon monoxide and carbon dioxide. Although the homogeneous reactions are well understood, the heterogeneous reactions and their effect on the …
-
Transition metal oxide layered materials as catalyst and precatalyst for green energy applications: Oxygen evolution reaction and Fischer-Tropsch synthesis
… of upgraded, low-cost and, earth abundant catalyst for the OER. We demonstrated that the layered materials constructed from the same batch of nanosheets, but with different interlayer hydration structure exhibited significant differences in catalytic activity for chemical and …
-
Synthesis and Characterization of Bi-functional (ORR/OER) Nano-catalysts in Alkaline Media
The catalysts described in this thesis can be utilized in the systems that work by: storing energy, adding to the energy economy and directly converting chemical energy into electrical energy. This thesis presents the synthesis methods and characterization of three families of catalysts that are …
-
Application of density functional theory and machine learning in the prediction of efficient catalysts for the oxidative coupling of methane with reduced CO2 production at low temperature
… This thesis focuses on the generation of catalyst component electronic properties via density functional theory (DFT) and the analysis via machine learning (ML) techniques of the combination of the DFT-computed electronic properties and high-throughput experimental data comprising 12708 …
-
CO AND CO2 HYDROGENATION BY FISCHER TROPSCH SYNTHESIS PROMOTED WITH IRON BASED HETEROGENEOUS CATALYSIS: DATA COLLECTION AND PROCESS DESIGN
… relies on syngas (CO/H2) over transition-metal catalysts, but the direct hydrogenation of CO2 has been less explored, particularly with Fe-based heterogeneous catalysts. Iron is an abundant and inexpensive metal, already known for its high activity in conventional FT from CO. This research aims …