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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 37 for “"Co-conversion"”.
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Plasma-based CO₂ Conversion for Mars ISRU
Plasma-based CO₂ conversion is a promising power-to-gas chemical synthesis process for Mars In-Situ Resource Utilization (ISRU). The abundant CO₂ in the Martian atmosphere can be converted into breathable oxygen and fuel for astronauts, enabling safer and more independent Mars missions while …
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A first principles computational study of ZnO/PbTiO₃ as a tunable catalyst for CO₂ conversion
… to take advantage of the vast amount of waste CO₂ we produce by its conversion to useful substances. This approach is currently impractical due to the high temperatures and pressures generally required for the synthesis of compounds using CO₂ as a precursor. To make direct CO₂ capture and …
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Carbon monoxide clean-up of reformate gas by preferential oxidation
… by wetness impregnation at a high pH and the second was prepared by incipient wetness impregnation. Catalytic activity was measured at varying temperatures, space velocities as well as O2/CO ratio. The Ru catalyst catalyst prepared using wetness impregnation at high pH was found to exhibit …
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Study of the effects of promoters (MnOx and FeOx) on Co3O4/CeO2 during Preferential Oxidation of Carbon monoxide
… there is an urgent need for improving access to eco-friendly and reliable energy alternatives. One of the leading and promising pollution-free high-energy carriers is hydrogen for fuel cells. Currently, hydrogen gas is mostly produced via steam reforming followed by the water-gas shift reaction …
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Oxidation of Carbon Monoxide Over Ceria and Alumina Supported Palladium Catalysts
… in activity. X-Ray Photoelectron Spectroscopy studies revealed structural changes associated with palladium states and reacted catalysts and displayed a change from palladium oxide (PdO) to native palladium oxide (PdOx) and elemental palladium (Pd). Activity studies were conducted on all …
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Technoeconomic Analysis and Design of CO₂ Capture and Conversion Systems
Carbon capture and conversion technologies must become economically viable and scale to the gigaton level by 2050 to avoid the most serious effects of a climate crisis. Here we present a techno-economic analysis of two promising capture and conversion technologies: CO₂ capture from ocean waters via …
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The use of ruthenium Y zeolite catalysts for the selective methanation of carbon monoxide
Fuel processing is the conversion of hydrocarbons to produce a mixture of H2 and CO, whereby the H2 will be used in a PEMFC. CO needs to be removed as the tolerance level of the Pt based electro catalyst is only 10 ppm of CO. In order to lower the concentration from 1% post-WGS, to 10 ppm, CO can …
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Development of a Kinetic Model for Low Temperature Fischer-Tropsch Synthesis
… reaction in which syngas, a mixture of CO and H2, is converted to hydrocarbon products ranging from methane to wax when low temperature conditions are used. Subsequent product upgrading steps allow high quality liquid fuels to be obtained which are clean burning. This will help to …
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Perovskites as New Support Materials for the Iron Based Fischer-Tropsch Synthesis
In the Fischer-Tropsch process, valuable products consisting mainly of long chain hydrocarbons and water as by-product are synthesized from the basic starting materials hydrogen and carbon monoxide, derived from sources such as coal, gas or biomass [1]. Iron catalysts and cobalt based systems are …
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Traversing catalytic contexts for interrogation and design of carbon conversion electrocatalysts
… useful chemistry to perform electrochemically is CO₂ conversion. Converting CO₂ into value-added chemicals could be one strategy for abating atmospheric carbon, and electrochemistry is well-suited to provide the driving force required for CO₂ conversion reactions that tend to be highly endergonic. …
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Computational Fluid Dynamics of High Temperature Shift Reaction of Reformate Gas in Fixed Bed and Membrane Reactors
… in order to boost its industrial use as it contains impurities such as carbon dioxide, carbon monoxide, hydrogen sulphide and ammonia that limits its value. Renewable hydrogen is a clean, carbon-free energy resource that is obtainable from biogas upgrade via the reforming process. To …
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Synthesis and Catalytic Applications of Ni-Based Single-Atom and Nanoparticle Catalysts Supported on UiO-66-NH2
… of industrial productivity, air pollution has become a shared concern globally. One of the most discussed topics in this field is the recycling and utilization of industrial exhaust gases, particularly the high-value utilization of carbon dioxide emissions. In this project, we focus on the …
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Utilization of cobalt catalyst for high temperature Fischer-Tropsch synthesis in a fluidized bed reactor
… bed reactor (FBR) will allow the use of cobalt catalyst for high temperature Fischer-Tropsch synthesis (HTFT). Cobalt was loaded onto a gamma alumina support, the catalyst was characterized using TPR, BET/BJH, XRD, and PSA to track changes in the catalyst morphology. The reactor was …
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ENHANCING GAS PHASE FISCHER-TROPSCH SYNTHESIS CATALYST DESIGN
… in the development of a Fe based catalyst with Co as a co catalyst, and Ru and ZnO as promoters. The role of Cu and K as promoters and the effect of SiO<sub>2</sub> as an alternate support to gamma- Al<sub>2</sub>O<sub>3</sub> were also investigated. A series of Fe-based catalysts for …
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Comparing the performance of different catalyst packings for Fischer-Tropsch synthesis
The increase in global population accompanied by depleting fossil fuel reserves and rising fuel demand is prompting the need to increase and diversify fuel production rates. In addition, increasing global pressure to reduce the contribution of greenhouse gas emissions to global warming and as well …
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Deuterium Tracer Studies Of The Mechanism Of Cobalt Catalyzed Fischer-Tropsch Synthesis
… catalytic polymerization reaction has been discovered in 1920s, many kinds of possible mechanisms have been reported. However, there is still debate because there is a lacking of experimental evidence to discriminate the validity of each mechanism. To define the mechanism of …
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The use of hydrotalcite derived catalyst precursors in the Fischer-Tropsch synthesis
… of a catalyst the aim is to obtain the best combination of activity, selectivity and stability with the optimum number of effective active sites of the catalyst exposed to the reaction medium [Gibson, 1999]. Catalysts that have a large catalytically active surface area exposed to the reaction …
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Active Interfaces: From Biointerfaces to Mineralization
… different angles. First, a fundamental study is conducted on a novel boiling droplet self-propulsion phenomenon that occurs when a surface is coated with a thin oil film. A scaling model is developed that predicts the velocity of the self-propelling droplet, and the model is used to estimate the …
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Probing the Role of Amines in Aqueous Electrochemical Reduction of Captured-state CO₂
Integrating CO₂ capture and CO₂ conversion into a single reactor presents an opportunity to power the combined process with renewable electricity. The integration of these two historically separate technologies establishes a large system parameter space, which introduces many handles for system …
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Evaluation of aged woodstove catalysts
… of atmospheric pollutants has been a growing concern in the last two decades, and catalytic combustors have been used in woodstoves to reduce emissions. Field tests of EPA-certified catalytic stoves have demonstrated that emission factors increase substantially after a few seasons of use, and …
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