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 5 of 5 for “"Catalyst pellets"”.
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Characterization of catalyst pellets using NMR and MRI: MRI, diffusion and relaxation measurements of liquid imbibed in alumina and titania extrudates
In this thesis a range of catalyst pellets are studied using Nuclear Magnetic Resonance (NMR) and Magnetic Resonance Imaging (MRI) techniques with the aim of characterizing mass transport in the pellets and exploring the presence of spatial heterogeneities formed in the manufacturing process. …
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The performance of structured cobalt catalysts in Fischer-Tropsch synthesis
Cobalt is the preferred catalyst metal for the production of clean burning, high cetane number diesel fuel from synthesis gas using the Fischer-Tropsch synthesis. Hence, increasing C5+ selectivity of cobalt catalysts is one of the hot topics in Fischer-Tropsch synthesis. Internal mass transport …
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Development of a procedure for preparing and testing molybdena-alumina catalysts for olefin disproportionation
… a procedure for preparing molybdena-alumina catalysts for olefin disproportionation and to develop equipment and procedures for exploratory testing of the catalysts. A reproducible procedure for preparing molybdena-alumina catalysts was developed. This procedure consisted of impregnating …
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Packed bed reactors at the pellet scale: magnetic resonance studies of hydrodynamics, mass transport and reaction
… phenomena occurring at the scale of individual catalyst pellets is poorly understood due to a lack of experimental techniques capable of non-invasively probing these phenomena at the pellet scale. This thesis presents the development and implementation of magnetic resonance (MR) techniques to …
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NMR Studies of Emulsions in Porous Media and Applications to Fischer-Tropsch Synthesis
… droplet formation was done on $\theta$-Al2O3 pellets by relaxometry and PFG NMR measurements at ambient conditions, where dodecane and water were model compounds for FT products. The relaxation results indicated that water was the surface wetting phase, while dodecane was isolated from the …