Stefania Catalano
Synthesis and study of catalysts with perovskite-based supports for cyclic CO2 methanation.
Rel. Samir Bensaid, Fabio Salomone. Politecnico di Torino, Corso di laurea magistrale in Ingegneria Chimica E Dei Processi Sostenibili, 2025
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Abstract
In recent years, carbon capture is emerging as a valid solution to close the carbon loop for processes with unavoidable CO2 emissions. Upon capture, CO2 can be either stocked or converted into value-added molecules. The present study focuses on a combined CO2 capture and conversion process, leading to methane production. Dual functional materials have served this purpose. In the first part of this work, five catalysts with a low ruthenium loading and perovskite-based supports (SrTiO3 and BaCeO3) were synthetized via solid-state route. The active metal phase was introduced into the materials using different approaches. In two cases, Ru was deposited on the support surface via impregnation, while in the others, Ru was incorporated as a B-site ion into the perovskite matrix and subsequently exsolved through thermal treatment in a reducing environment, forming nanoparticles on the surface.
Additionally, the effect of the sintering temperature (1000°C and 1400°C) was investigated for one of the exsolved catalysts
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