Author: Maria MikhailPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
The fight against the constant increase of carbon dioxide CO2, is one of the greatest challenges of mankind. In this work, we focused on the CO2 methanation reaction as a promising approach for CO2 reduction since the generated CH4 can be readily stored in the existing gas grid or used as raw materials for valuable chemical production. The combination of plasma technology and catalysis allows to bypass the severe conditions of high temperatures and pressure requested in conventional thermal approach and to meet the requirements of a flexible production powered by renewable energies. This PhD thesis is a multidisciplinary study, in which in the first step we focused on the elucidation of crucial facts regarding the mechanism of the CO2 methanation reaction in the presence of DBD plasma and the Ni/CeZrOx catalyst. In a second step, a series of promoters was studied to investigate the effect of the physicochemical and electrical properties of the catalyst on the energy efficiency of CO2 methanation. This study aims to provide insights enabling to improve the synergy between the plasma and the material and contributes to the development of a new methodology for the selection of the most appropriate catalysts in terms of energy efficiency for DBD plasma catalytic CO2 methanation. Finally, we investigated the influence of plasma processing parameters and the reactor design combined with a simulation study on COMSOL Multiphysics on the energy efficiency of the plasma-catalytic CO2 methanation process.