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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 41 for “"Methanation"”.
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Unlocking the power of underground (bio)methanation
L'abstract è presente nell'allegato / the abstract is in the attachment
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Simulation of a fixed-bed methanation reactor.
Thesis: M.S., Massachusetts Institute of Technology, Department of Chemical Engineering, 1973
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Non-Thermal Contribution to Ruthenium Photothermal Catalyst in Carbon Dioxide Methanation
… effects. Using Ru–SiO2 as a model system for CO₂ methanation, we demonstrate over 100-fold enhancement in CH4 production in blue light compared to green light. The reaction rate scales nearly linearly with light intensity and exhibits a sharp spectral cutoff near 500 nm, disappearing at longer …
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Studies of Carbon Dioxide Methanation and Related Phenomena in Porous Catalysts
… Dissertation investigates the kinetics of CO2 methanation over nickel and cobalt catalysts. Methanation was studied for both Ni/γ-Al2O3 and Co/ZrO2 catalysts, which were synthesised using an incipient wetness impregnation technique and subsequently characterised using analyses based on gas …
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A study on the effect of lateral interactions on methanation over Fe(100)
… of the process is explored. Understanding the methanation of syngas allows for a better understanding of the initial stages of Fischer-Tropsch synthesis. Density functional theory was used to calculate the energies and properties of simple methanation adsorbates on an Fe(100) surface. All of …
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The use of ruthenium Y zeolite catalysts for the selective methanation of carbon monoxide
… 10 ppm, CO can be converted to CH4 via selective methanation. A selective catalyst primarily methanates CO and inhibits the methanation of CO2 which results in the over consumption of H2. Common catalysts for SMET include Ru/Al2O3 and Ru/Y zeolites. This study involved the use of Ru/Y zeolite …
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Methanation of CO2 over nickel and molybdenum bi-metallic catalyst system supported on activated carbon
Submitted in fulfillment of the academic requirements for the degree of Doctor of Engineering: Chemical Engineering, Durban University of Technology, Durban, South Africa, 2025.
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Development of dual function materials (DFMs) with low-ruthenium content for cyclic methanation of CO2
L'abstract è presente nell'allegato / the abstract is in the attachment
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Selective methanation of CO in H2-rich gas using Pd/TiO2, Ni/TiO2 and PdNi/TiO2 catalysts
Hydrogen fuel cells are renowned for their ability to produce minimal or negligible levels of harmful greenhouse emissions, making them pivotal in mitigating climate change. Hydrogen is a versatile energy carrier that can replace petroleum in various energy applications. During hydrogen production, …
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Studies of an alkali impregnated cobalt-molybdate catalyst for the water-gas shift and the methanation reactions
… on an A1 203 support, for the water-gas shift, methanation, and ethanol dehydration reactions, we can make the following conclusions: 1. The cesium-impregnated "Aldridge" catalyst is highly active for the water-gas shift reaction under sulfur tolerant conditions. 2. The activity of this catalyst …
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Study of the effects of promoters (MnOx and FeOx) on Co3O4/CeO2 during Preferential Oxidation of Carbon monoxide
… to other techniques such as selective CO methanation and pressure swing adsorption (Park, Lee and Lee, 2009). Catalysts used for CO-PROX are either noble metal or transition metal oxide based. Noble metal-based catalysts have a low CO oxidation activity at temperatures below 200 °C, higher …
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The use of coherent anti-Stokes Raman Spectroscopy as a diagnostic technique for studying the hydrogenation of carbon moxide in a tube-wall reactor
The methanation reaction, discovered in 1902 by Sabatier and Senderens, still remains a subject of intense interest. It is currently used in numerous industrial processes to remove carbon monoxide traces in hydrogen-rich gases of ammonia plants. Since the early 1980's there has been a renewed …
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DEVELOPMENT OF NOVEL CATALYSTS AND PROCESSES FOR SUSTAINABLE HYDROGEN TECHNOLOGIES
… like propane dehydrogenation (PDH), CO₂ methanation, dry reforming of methane (DRM), and COₓ-free catalytic methane decomposition (CDM). A core challenge in these processes is catalyst sintering, which reduces stability and performance. The research develops anti-sintering strategies …
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Perspectives on third generation gaseous biofuel
… to methane by biological or catalytic methanation is also considered as a candidate for third generation feedstock to produce gaseous biofuel. Micro-algal biomass can be produced using waste exhaust streams from industries containing CO2, SOx, NOx. The emissions from a 1 GWe coal power …
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Analysis of hydrogen-based energy storage pathways
… storage (compression, liquefaction or methanation), transportation (trailer or pipeline) and utilization (PEMFC, SOFC or combined cycle gas turbine). All processes are simulated with respect to their full and part-load efficiencies and resulting costs. Furthermore, load profiles are …
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Synthesis, characterisation, and evaluation of supported cobalt molybdenum nitride for Fischer-Tropsch reaction
… kinetic models suggested that methanation over Co nitride occurs mainly via surface carbon while surface oxygenated intermediates were accountable for methanation over Co-Mo nitride and Mo nitride.
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Kinetic Consequences of Surface Oxygen Species during Catalytic C3H6-O2, CO-O2, and COx-H2 Reactions on Transition Metal and Alloy Clusters
C3H6 epoxidation, CO oxidation, and COx methanation reactions are important for emission abatement and value-added compound production. They occur on transition metal/alloy clusters via the kinetic coupling of steps that involve activation of carbon containing reactants (C3H6, COx) with …
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AuPt nano-alloys as reduction promoters for Co/TiO₂ Fischer-Tropsch catalysts
… this effect has to be balanced against increased methanation activity.
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The impact of sustainability assessment of renewable gas systems on policy implications and optimum end use
… from farming, and grass silage. Gasification and methanation of willow are potential future resources. The 2018 recast European Renewable Energy Directive (RED recast) sets emissions savings criteria for renewable fuels. The criteria are more stringent for use of the fuel as heat, with both a …
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Nanostructured Cerium Oxide-based Catalysts for the Chemical Conversion of CO2 to Dimethyl Carbonate and Methane.
… as supports for nickel-based catalysts in the methanation reaction. Various synthetic strategies were developed (hydrothermal synthesis, solution combustion, soft-template method, two-solvent impregnation, and combination with self-combustion), and their influence on the morphology, surface …
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