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 18 of 18 for “"Methane conversion"”.
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Biological methane conversion by methanotrophic bacteria
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-04-12 without embargo terms
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Development of new steam methane reforming mobile plant with micro-scale catalytic channels
… hydrogen production is made via catalytic steam methane reforming (SMR). A performing catalyst favors thermodynamic equilibrium that ensures good hydrogen selectivity. This research explores the potential of SMR yield intensification using experimental micro reactor and active noble metal …
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Catalytic Oxidation of Methane Over Alumina Supported Palladium Oxides
… for low temperature catalytic oxidation of methane. The catalysts were prepared by various methods and then characterized and screened to select the best catalyst for further studies. A 5% (wt/wt) Pd/y-AhCb catalyst prepared by an improved vortex-assisted incipient wetness method showed the …
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Selective oxidation of methane in a trickle bed reactor over a platinum-based catalyst
The direct on-site conversion of methane to methanol could provide a more cost-effective and less energy-intensive utilization of natural gas compared to the industrial two-step syngas based route. Despite the numerous approaches investigated for direct methane to methanol (DMTM) conversion in the …
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Computational design, sensitivity analysis and optimization of fuel reforming catalytic reactor
In this research, the catalytic combustion of methane is numerically investigated using an unstructured, implicit, fully coupled finite volume approach. The nonlinear system of equations is solved by Newton’s method. The catalytic partial oxidation of methane over a rhodium catalyst in one channel …
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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
The oxidative coupling of methane (OCM) remains a promising means for the production of ethylene. Though high temperatures of 900 oC and above lead to increased conversion of methane, at higher temperatures, the OCM reaction tends to favour a competing reaction that leads to the production of COx …
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Developing and evaluating a partition-cavity solar thermochemical reactor for syngas production via computational fluid dynamics
… thermochemical reactor for the dry reforming of methane (DRM) process. The heat transfer results revealed that the conduction of the strut is dominant for the temperature distribution in the catalyst region. The diversified shapes of POCS have little influences on the methane conversion under the …
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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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Experimental characterization of an Ion Transport Membrane (ITM) reactor for methane oxyfuel combustion
… for oxygen separation and fuel (mostly methane) conversion purposes over the last three decades. The fuel conversion investigations typically involve converting methane to syngas or higher hydrocarbons. Over the past decade, ITMs have received considerable interest in the industry for …
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The aerobic, water-assisted selective oxidation of methane over platinum-based catalysts
The selective oxidation of methane to C1-oxygenates such as methanol, formaldehyde and dimethylether remains one of the grand challenges of catalysis chemistry, due to the difficulty in attaining high selectivities at high methane conversions. This has been attributed to the higher reactivity of …
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Non-thermal Plasma Assisted Catalytic Upgrading of Low-cost Hydrocarbons
… This novel technology can effectively convert methane at near ambient temperature and atmospheric pressure. A methane conversion higher than 40% can be achieved over the SBA-15 catalyst. Unlike the conventional thermos-catalytic process, activated methane can directly convert into the liquid …
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Catalytic, low temperature oxidation of methane into methanol over copper-exchanged zeolites
… environmental 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 …
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Synthesis and characterization of thermally stable palladium-based composite membranes for high temperature applications
… stability was also evaluated in actual steam methane reforming (SMR) environments. Thin film (~5.0 µm thick) Pd-Ru and Pd-Au composite membranes were fabricated and used to carry out SMR over commercial Ni or Ru based catalysts at temperatures > 480 °C and pressures up to 2.9 MPa. The …
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Enhancing biomethane production from anaerobic digestion of Sargassum muticum
Higher methane yields from the anaerobic digestion (AD) of Sargassum muticum could improve the process energy balance and make its use during AD more economical and energetically favourable. Previous research showed that after 28 days of AD, methane yields from S. muticum were low (17% of the …
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Effect of High Shear on Anaerobic Digestion in an Anaerobic Membrane Bioreactor (Anmbr) Treating High Strength Wastewater
… of growth of methanogenic zones required for methane conversion. The objective of this study was to evaluate if and to what extent high shear in AnMBRs can decrease reactor performance. A 6-liter AnMBR with an ultrafiltration membrane was fed swine waste. Methanogenic population dynamics …
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Evaluation of alkali and alkaline earth doped samarium oxide catalysts for the oxidative coupling of methane
The catalytic oxidative coupling of methane involves the reaction of methane and oxygen at high temperatures (650°C 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 …
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Heterogeneous catalysis in the different reactor types on the examples of ethyl benzene to styrene, methane dehydroaromatization and propylene carbonate, methanol transesterification
… results as well as superbase MgO/Na/NaOH. PC conversion of around 70 mol.% with 99 mol.% DMC and PG selectivity was achieved. However, reaction performing in the liquid phase doesn’t allow effective reuse of the catalyst. For this reason it was attempted to perform this reaction …
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Valorisation du méthane par conversion directe pour la production de vecteurs énergétiques à faible intensité carbone
… faisabilité de stratégies catalytiques pour la conversion directe du méthane en vecteurs énergétiques d'intérêt industriel, tels que les produits oxygénés-C1, l'hydrogène et le carbone solide. Les études expérimentales développées à cette fin sont divisées en deux parties et ont été définies …