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 19 of 19 for “"Bimetallic catalyst"”.
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Bimetallic Catalyst for Lignin Depolymerization
… catalytic systems, a copper-doped porous metal catalyst has been researched often due to the ability to product hydrogen via alcohol reforming and perform hydrogenolysis for lignin depolymerization at aryl-ether linkages. Process. However, the use of nickel in other catalytic systems suggest a …
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Elucidation of nitrate reduction mechanisms on a Pd/In bimetallic catalyst using isotope labeled nitrogen species
Catalytic hydrogenation over Pd-based catalysts has emerged as an effective treatment approach for nitrate (NO3-) removal, but its full-scale application for direct treatment of drinking water or ion exchange regenerant brines requires improved selectivity for the end-product dinitrogen (N2) over …
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Kinetic Studies of Model Reactions to Transform Biomass into Fuels
… using model compounds to elucidate the role of bimetallic catalyst and control the reaction operating parameters such as temperature and hydrogen pressure to maximize energy recovery in the liquid product from biomass resource.
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Kinetic Studies of Model Reactions to Transform Biomass into Fuels
… using model compounds to elucidate the role of bimetallic catalyst and control the reaction operating parameters such as temperature and hydrogen pressure to maximize energy recovery in the liquid product from biomass resource.</p>
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Development of supported nanocatalysts for hydrogen production technologies
In this thesis, the development of nanocatalysts for two different hydrogen production technologies is described. In the first part, a series of supported Ni-Co catalysts were tested for activity in the catalytic partial oxidation of methane to hydrogen/syngas. A 2 wt.% Ni 1 wt.% Co bimetallic …
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Industrial Ni-Based Catalyst Development for Carbon Dioxide Reforming of Methane
… first phase, Ni and Co monometallic and Ni-Co bimetallic catalysts were prepared by using both co-precipitation and impregnation methods. Cylindrical and spherical shaped catalysts were made using the Ni-Co bimetallic catalyst with and without the addition of Boehmite as the binding material. …
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CVD synthesis of graphene
… Few layer graphene was grown using a bimetallic catalyst of sodium and cobalt. Addition of the sodium caused a visual decrease in the amount of carbon deposited from ethanol chemical vapour deposition. The product when observed using the scanning and transmission electron microscope …
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Block Copolymer Formation by Transformation Reactions
… catalysed by the premixed and unmixed bimetallic catalyst system WCl₆/LiBu has been studied dilatometrically. These studies show that both the premixed and unmixed catalyst systems show similar catalytic properties. The rate of polymerisation shows a maximum at a catalyst/monomer ageing …
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The design of ultrafast routes to synthesis carbon nanotubes by microwave
… nanoplatelets. Here ferrocene serves as metal catalyst. Carbon nanotubes will form in 15-30 seconds. Also, zirconium is included in some samples as one component of bimetallic catalyst, and carbon nanotubes also formed in less than 1 minute. The irradiation of these mixtures in the presence of …
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Developing electrochemical methodologies towards addressing challenges in flow energy conversion technologies
… for sustainable fuel production face critical catalyst optimization challenges, particularly in developing energy-efficient alternatives to the oxygen evolution reaction that dominates electrolyzer energy consumption. This dissertation presents electrochemical methodologies developed to …
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Alumina-supported palladium and palladium/copper catalysts: Characterization and use for selective hydrogenation of 1,3-butadiene
… improve the currently employed palladium-based catalysts. The purpose of this research has been to investigate the effects of adding copper to alumina-supported palladium to enhance the selectivity of palladium for butadiene hydrogenation. 1,3-Butadiene semi-hydrogenation was studied in the …
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Spectroscopic and synthetic studies relating to a dirhodium hydroformylation catalyst
… was to further study and characterize our bimetallic hydroformylation catalyst, rac-[Rh<sub>2</sub>(nbd)<sub>2</sub>(et,ph-P4)](BF<sub>4</sub>)<sub>2</sub>, and to fully identify the catalytically inactive mono- and dirhodium complexes formed upon fragmentation of the catalyst under …
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Hydrocracking of long chain n-Paraffins under Fischer-Tropsch conditions
… of the pure palladium noble metal hydrocracking catalysts. The hydrocracking mechanism consists of two functions, namely the metal de-/hydrogenation (HD/DHD) and the acidic -scission function. The addition of CO to reactions involving monometallic palladium hydrocracking catalysts has led to an …
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Structure-activity relationships for the water-gas shift reaction over supported metal catalysts
… These relationships facilitate the rational catalyst design by identification of catalyst descriptors. In order to establish such relationships, various studies were undertaken, such as (i) effect of transition admetals on the WGS catalysis by molybdenum carbide (ii) effect of residual oxygen …
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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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Gas-phase processes for carbon nanotubes production: catalyst synthesis and CNT reorientation dynamics
… depositions (CVD) on substrates and floating catalysts (FCCVD) are considered the most promising routes for the scalable production of high-quality CNTs. Aerosol dynamics play a uniquely important role in CNT synthesis and aerosol processes have emerged as a versatile approach for the scalable …
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Design and Synthesis of Mixed-Metal Supramolecular Complexes Incorporating Specialized Light Absorbing Units to Investigate Processes Relevant to Catalyst Function
… Ru(II),Ru(II), Ru(II),Rh(III), and Ru(II),Pt(II) bimetallics of the design [(TL)2Ru(BL)Ru(TL)2](PF6)4, [(TL)2Ru(BL)RhCl2(TL′)](PF6)3, and [(TL)2Ru(BL)PtCl2](PF6)2 (TL/TL′ = bpy or d8-bpy; BL = dpp or d10-dpp) couple only one Ru(II) LA to a Ru(II), Rh(III), or Pt(II) metal center through the BL. …
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Novel electrode fabrication and reactor design for electrocatalytic nitrate and nitrite reduction in drinking water treatment
… a carbon cloth electrode deposited with Pd–In bimetallic catalysts. The reactor was designed to be capable of stacking multiple electrodes for scale-up purposes. The performance results demonstrate high activity, Faradaic efficiency, and dinitrogen (N₂) selectivity, and identify the optimal …
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ENHANCING GAS PHASE FISCHER-TROPSCH SYNTHESIS CATALYST DESIGN
… resulted in the development of a Fe based catalyst with Co as a co catalyst, and Ru and ZnO as promoters. The role of Cu and K as promoters and the effect of SiO<sub>2</sub> as an alternate support to gamma- Al<sub>2</sub>O<sub>3</sub> were also investigated. A series of Fe-based catalysts …