Efficient conversion of CO2 to useful energy products with the use of catalysts prepared via 3D printing
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Ημερομηνία
2023-04-20
Συγγραφείς
Kama, Marianna
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The goal of this dissertation was to evaluate the catalytic performance of metal oxide
structured catalysts with optimized geometries prepared via 3D printing for the efficient
conversion of carbon dioxide to useful energy products. Three-dimensional (3D) printing,
also known as additive manufacturing, is a fabrication method that creates structures
from digital models. Despite the profound impact that 3D printing has had in many fields,
its application in the production of catalysts, which are typically metal or metal oxide
structures of high complexity with chemical functionalities, is still in its early stages.
In the context of circular economy, carbon capture and utilization (CCU) technologies
represent an outstanding opportunity to capture and convert carbon dioxide into valueadded materials. One particularly appealing product is dimethyl ether (DME), which can
be used as a fuel substitute in transport with reduced environmental impacts relatively
to conventional fuels. This thesis consists of the detailed characterization of the
physiochemical properties of the catalysts with various methods and the evaluation of
their performance in the direct CO2 to DME conversion under various operating
conditions. The primary findings of this study demonstrated that commercial catalysts in
powder form outperformed 3D-printed catalysts in terms of CO2 conversion and product
yields. Despite the monoliths’ considerably lower activity their increased DME selectivity
is promising. Future research is advised to further understand the limitations of the 3D
printed catalysts and discover the opportunities to improve their performance.
The experimental work related to the characterization of the physicochemical properties
and the evaluation of the catalytic performance was conducted at the Laboratory of
Environmental Fuels and Hydrocarbons (LEFH) in CPERI/CERTH, in Thermi Thessaloniki.
This dissertation was written as part of the MSc in Energy and Finance at the International
Hellenic University.
Περιγραφή
Λέξεις-κλειδιά
Direct CO2 hydrogeneration, Dimethyl ether, DME, Bifunctional catalysts, 3D printed monoliths