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 44 for “"Methane oxidation"”.
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Performance of Floating Biofiltration in Methane Oxidation
… livestock industry are significant sources of methane (CH₄), a potent greenhouse gas that contributes substantially to climate change. Biofiltration, which relies on microbial oxidation, has emerged as a sustainable and effective method for mitigating methane emissions. This study introduces a …
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Enhanced Methane Oxidation Catalysis Through Feed Modulation And Oxygen Storage
… the development and optimization of novel methane oxidation catalyst. In this project, the catalytic oxidation of methane is examined under lean and stoichiometric conditions across several catalysts and how feed modulations can enhance catalyst performance. In the first section of this …
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Biochemical Methane Potential and Methane Oxidation Potential of Excavated Waste Residue from Calgary Biocell
… value of Biocell technology. Biochemical methane potential (BMP) and methane oxidation potential (MOP) of the EWR were evaluated to find the carbon offset of the Calgary Biocell project and potential application of EWR in future landfill biocovers. The EWR samples were collected from …
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Praseodymium doping in Pd/CeO2 systems: material properties and application for the complete methane oxidation reaction
L'abstract è presente nell'allegato / the abstract is in the attachment
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Catalytic, low temperature oxidation of methane into methanol over copper-exchanged zeolites
… hazard and a wasted resource. The conversion of methane, the primary component of natural gas, into methanol, an easily stored liquid, is of practical interest. However, shale wells are generally inaccessible to reforming facilities, and construction of on-site, conventional methanol synthesis …
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Design and Engineering of Carbon Fixing Material Systems
… greenhouse gases such as carbon dioxide and methane into monomeric chemicals such as formaldehyde. A mathematical analysis of CO₂ photoreduction revealed that carbon conversion and material growth rates which rival that of living plants can be obtained with currently employed photocatalytic …
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Microbial monitoring and degradation of lindane in soil
… part of this research, the applicability of methane oxidation, an important soil function performed by methanotrophic bacteria, was evaluated as a microbial indicator for the monitoring of HCH pollution. The effect of HCH on both the activity and the structure of the methanotrophic community …
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Deactivation and enhancement effects of sulfur on supported platinum oxidation catalysts
The effects of sulfur poisoning on the oxidation activity of 1.5 % Pt/[gamma]-Al_2O_3, Pt/TiO_2, Pt/ZrO_2, and Pt/SiO_2, were investigated in this study. Each catalyst was poisoned with an H_2S/air or SO_2/air mixture at 400 C for 24 hours and a sulfur concentration of 200 ppm. The complete …
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Carbon cycling: The role of Methane and Copper in an early ocean analogue Lake Matano
… with a primary focus on the critical role of methane in carbon redistribution in this system. In addition, the mobility and availability of copper (Cu) (an essential component of microbial enzymatic systems related to methane oxidation) was evaluated in this iron-dominated, aquatic ecosystem. …
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Restoration of Degraded Land: A comparison of Structural and Functional Measurements of Recovery
… the rates observed in reference areas. Methane oxidation rates were generally increased in disturbed plots compared to undisturbed references due to increased atmospheric diffusion into the soil. Amended areas exhibited depressed rates relative to unamended, and seeding level had no …
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Diversity of methane and short chain hydrocarbon degrading bacteria with an emphasis on methane biofilter systems
Methanotrophs house enzymes capable of methane oxidation, act as a sink for atmospheric methane and play a key role in the global carbon cycle. This study conducted multiple studies on methanotrophs, including: examination of the evolutionary history of copper membrane monooxygenases (CuMMOs), …
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Catalytic control of individual hydrocarbons from a small utility gasoline engine
… control of individual hydrocarbons such as methane, ethylene, benzene, and toluene were evaluated. A platinum coated catalyst treated emissions from a 107cc, four-cycle gasoline engine loaded with a 1.4KW portable generator. Determination of emissions was performed at three different load …
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Characterizing methanogen and methanotroph diversity, abundance and activity within the Hampshire-Avon catchment
Methane (CH4) is an important greenhouse gas and research into its production and oxidation by microbial communities is crucial in predicting their impact in future climate change. Here, potential rate measurements, quantitative real-time polymerase chain reactions (Q-PCR) of pmoA, mcrA genes and …
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Biogeochemical investigations of methane-rich groundwaters in high Arctic glacial catchments
… a potentially large reservoir of sub-surface methane and prevents it from reaching the atmosphere. The vulnerability of the cryosphere to climate warming is making releases of this methane possible, but uncertainty in the magnitude and timing of such releases makes predictions of Arctic …
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Materials Characterization and Spectroscopy for a Methane Abatement Catalyst
Methane is the second-most emitted greenhouse gas after carbon dioxide, and it is significantly more powerful as a short-term warmer, making it a valuable target for climate change mitigation efforts. Zeolites are earth-abundant minerals common in catalysis for their low price combined with high …
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An investigation into the origin, measurement and application of chemiluminescent light emissions from premixed flames
… species CH* and OH* are studied in premixed methane combustion to investigate the possible application of their light emissions in gas turbine combustion monitoring systems. The interpretation of integrated and local chemiluminescence measurements are shown to give important qualitative …
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Nanocrystalline perovskites for catalytic combustion and oxygen separation
… rate that was 2.5 times higher than LaMnO3. Methane TPR experiments showed that methane oxidation over the perovskites occurred by methane adsorption on the catalyst surface via hydrogen abstraction.
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Understanding Biogeochemical and Physical Controls on Methane Air-Sea Exchange Fluxes in the Pacific Ocean
<p>Methane and trace element samples were collected on GEOTRACES GP15 Pacific Meridional Transect (PMT) cruise conducted between the Aleutian Islands (57 °N) and Tahiti (20 °S) from September to November 2018. Uncertainty in methane air-sea exchange fluxes was determined using a propagation of …
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Trends in C-H bond dehydrogenation energetics for small molecule conversion
… small molecules such as formaldehyde, methanol, methane, and propane with oxide surfaces to reveal trends in adsorption energies, product selectivity, and reaction rates. We achieve this by developing suitable design descriptors by studying the reaction mechanism in situ. We first generated a …
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Methane distribution and oxidation across aquatic interfaces
The increase in atmospheric methane concentration, which is determined by an imbalance between its sources and sinks, has led to investigations of the methane cycle in various environments. Aquatic environments are of an exceptional interest due to their active involvement in methane cycling …
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