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 13 of 13 for “"catalyst characterization"”.
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Non-Steady-State Catalyst Characterization with Thin-Zone TAP Experiments
Rational catalyst design must be advanced beyond its state-of-the-art given the significant economic and environmental relevance of catalytic technologies. To address this challenge, precise kinetic characterization of industrial catalysts is required for elucidating complex reaction mechanisms, …
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Kinetic studies of ethane dehydrogenation using carbon dioxide as mild oxidant over gallium aluminum mixed oxide
The development of a stable catalyst with high reactivity and selectivity for ethane dehydrogenation has been a long-studied topic in the field of energy research. The synergetic effect of the mixed gallium and aluminum oxide had been studied in this work. We identified an optimized composition of …
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Fly Ash Zeolite Catalyst Support for Fischer-Tropsch Synthesis
… aimed at evaluating a fly ash zeolite (FAZ) catalyst support for use in heterogeneous catalytic processes. Gas phase Fischer-Tropsch Synthesis (FTS) over a fixed-bed of the prepared catalyst/FAZ support was identified as an appropriate process for evaluation, by comparison with commercial …
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Deactivation and enhancement effects of sulfur on supported platinum oxidation catalysts
… 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 oxidation of mixtures of I % CO, methane, ethane, ethene, ethyne, propane, propene, and n-butane in air were …
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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 …
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Vanadia Promoted Co-AI20 3 Fischer-Tropsch Catalysts
… on yAI203 supported cobalt-based Fischer-Tropsch catalysts. The y-Ah03 support was modified by addition of varying amounts of vanadia and was subsequently loaded with the same Co content (10 wt-%). The modified supports and catalysts were characterised using conventional characterisation methods. …
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Miniaturization and integration of photoacoustic detection
… low-level gas detection, biological studies, and catalyst characterization. In PAS, the incident radiation is modulated at an acoustic frequency. In the presence of an absorbing species, the periodic radiation is translated into periodic heat generation, which launches an acoustic signal. PAS is a …
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Bismuth Tungstate Photocatalysis for N-Nitrosamines Removal from Amine Washing Wastewater
… which uses UV light source and semiconductor catalysts is studied for degradation of organic and inorganic pollutants. Photocatalysis is used in this study for treating N-Nitrosodiethylamine (NDEA) with strong reactive hydroxyl radicals generated by UV/Visible light source and semiconductor …
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Kinetic and mechanistic studies for the direct conversion of syngas to ethanol
… fossil and non-fossil carbon resources. Rh-based catalysts offer the most promising results so far. However, the accomplished yields and rates still must be improved before industrial applications become viable. Owing to the complexity of the reaction network and the catalyst's behavior under high …
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Fundamental studies on copper zeolites for catalytic NO x abatement
… a member of this family, is a preferred catalyst for SCR applications because it shows exceptional hydrothermal stability in addition to commercially viable SCR performance. Our work focuses on 1) determination of the active sites, and 2) elucidation of the dominant reaction steps on …
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High-Pressure Vapor-Phase Catalytic Hydrodeoxygenation of Lignin-Derived Compounds to Hydrocarbons on Bimetallic Catalysts in the Range of 0.2-2.4 MPa.
… used to gain an understanding of how various catalysts performed at removing specific oxygen functional groups present in lignin (such as etheric methoxy and phenol groups), to investigate the HDO reaction pathways of these catalysts, and to apply this understanding to develop improved HDO …
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Preparation, Characterization and Evaluation of Bimetallic Catalysts Prepared by Electroless Deposition Methods
<p> Bimetallic catalysts have replaced many monometallic catalysts for a wide range of catalytic applications, due to their enhanced selectivity, stability, and/or activity relative to their corresponding monometallic components. These bimetallic catalysts are typically prepared using precipitation …
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Metal oxide supported iron-nickel nano-alloys in the reverse water-gas shift reaction
… and there is a need for low temperature catalysts with a high CO selectivity. Noble metal catalysts have been well studied for the RWGS, though affordable and abundant metals are required for large-scale applications. Iron-based catalysts have been widely explored due to their high …