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 “"CO2 hydrogenation"”.
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Iron-Based Alloys as Catalysts for CO2 Hydrogenation
Use of CO2 as a chemical feedstock in a wide range of applications has been postulated as a method to reduce its concentrations in the atmosphere, in an effort to combat climate change. An especially attractive use of CO2 is its hydrogenation to hydrocarbon fuels. If coupled with a source of …
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Methanol synthesis via CO2 hydrogenation: analysis and simulation of kinetic performance using typical industrial conditions
… viable feedstock. A promising outlet for CO₂ is hydrogenation to methanol. Methanol is widely used in the chemical industry, primarily in the production of formaldehyde, methyl-tert-butyl-ether, and acetic acid, as well as an alternative to traditional fuels due to its superior combustion …
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A Study on Catalytic Sites Contiguity in Cu-ZnO-Based Catalysts for CO2 Hydrogenation to Methanol
… the catalytic performance for carbon dioxide (CO2) conversion reactions. This work continues to investigate the CSC-performance relationship of CO2 hydrogenation to methanol (MeOH) in various Cu–ZnO systems. Three phases are formulated as follows. Phase 1 studied the CSC of atomically-dispersed …
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Synthesis and In-Depth Characterization of Fe-Based Catalysts and Zeolites for Efficient CO2 Hydrogenation to Hydrocarbons
L'abstract è presente nell'allegato / the abstract is in the attachment
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CO AND CO2 HYDROGENATION BY FISCHER TROPSCH SYNTHESIS PROMOTED WITH IRON BASED HETEROGENEOUS CATALYSIS: DATA COLLECTION AND PROCESS DESIGN
The reduction of CO2 emissions into the atmosphere has become a global priority, given the crucial role of this greenhouse gas in climate change. A promising approach to mitigate CO2 is its conversion into fuels and chemicals through processes such as Fischer–Tropsch (FT) synthesis. Traditionally, …
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Design and Synthesis of Metal Nanostructures for Plasmon-Enhanced Catalysis
… in two model reactions, carbon dioxide (CO2) hydrogenation and ammonia (NH3) synthesis.</p><p>Chapter 2 describes the development of slow-injection polyol methods to synthesize monodispersed Rh nanocubes with tunable size and resonant energy. The wide size tunability of slow-injection …
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Optimizing Adsorption Energies of Reaction Products and Intermediates on Metal/Metal Oxide Catalysts to Achieve High Activity and Tunable Selectivity in Solid-Gas Phase Reactions
<p>The solid-gas phase reactions, such as CO2 hydrogenation, the Fischer-Tropsh process, CO oxidation, and ammonia synthesis are one of the heterogenous catalytic reactions which have been emerged as a critical process in chemical and energy industries for a sustainable future. It needs a catalyst …
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Understanding Interfacial Kinetics of Catalytic Carbon Dioxide Transformations from Multiscale Simulations
Carbon dioxide (CO2), as a greenhouse gas, has shown to achieve the highest level in history, causes the global warming issue, leading to a 1.2 ℃ increase of the global average temperature. The consumption of fossil fuels is one of the main reasons that cause CO2 emission. Current industrial …
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Elemental and structural behaviors of bimetallic nanoparticles under reactive environments and its implication in catalyst design, processing, and performance
… model systems are metal-on-metal Rh-on-Pd for CO2 hydrogenation and Cu@CuAg nanocatalyst for propylene epoxidation. Environmental transmission electron microscopy was utilized in most of the projects mentioned above and provided critical information with high spatial resolution in realtime. The …
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Simultaneous production of methanol and dimethylether from synthesis gas
… process that involves synthesis of methanol by hydrogenation of CO/CO2 over a copper based catalyst and subsequent dehydration of methanol to DME over an acidic catalyst. Alternatively, DME can be produced in an one-step (direct) process using a hybrid (bifunctional) catalyst system that permits …
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Catalytic Conversion of Carbon-Containing Compounds into Valuable Chemicals and Fuels
… Metathesis of ethene and 2-butene; 2) Methane dehydrogenation and carbon dioxide hydrogenation. We developed three computational methodologies to study these processes across a range of length and time scales. First, we investigated how electronic structure affects the properties and reactivity …
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Application of Molybdenum Carbide Catalysts for the CO2-assisted Oxidative Dehydrogenation of Ethane
… is at present mainly met via catalytic/thermal dehydrogenation of alkanes at temperatures of up to 900 °C. Under these severe process conditions, competing side reactions and catalyst deactivation via coking are the major challenges. Co-feeding an oxidant significantly decreases the reaction …
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Development of novel catalysts for e-fuel production
L'abstract è presente nell'allegato / the abstract is in the attachment
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Heterogeneous Catalysis for CO2 Valorization: Catalyst Studies and Infrared Spectroscopy
L'abstract è presente nell'allegato / the abstract is in the attachment
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Ανάπτυξη λεπτών υμενίων για χρήση στην ηλεκτροχημική ενίσχυση της κατάλυσης
… (12000 h-1). Τέλος, μελετήθηκε η αναγωγή του CO2 από Η2 σε ηλεκτρόδια Cu/TiO2/YSZ χρησιμοποιώντας τόσο έναν αντιδραστήρα μονής πελέτας όσο και έναν μονολιθικό ηλεκτροχημικά ενισχυόμενο αντιδραστήρα υπό ατμοσφαιρική πίεση. Χρησιμοποιώντας τον αντιδραστήρα μονής πελέτας βρέθηκε ότι η αντίδραση …
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Hydrierung im invertierten Zweiphasensystem scCO 2/H 2 O
Catalysis using an inverted scCO2/H2O biphasic system where the catalyst is immobilized in scCO2 as stationary phase and the substrate and product are contained in the aqueous phase, offers an interesting alternative to classical biphasic systems and enables the conversion of polar substrates, …