Perin , Giovanni (2018) Advanced Ceramics for Sustainable Energy Conversion Processes: from High Functionality Chemical Tailoring to Nanoscale Designed Materials. [Ph.D. thesis]
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Abstract (italian or english)
The last decades have been characterized by a constant increase in the need of energy coupled with an increase in the greenhouse gases emissions, since a large amount of the energy is provided by combustion plants burning fossil fuels. The level of CO2 has reached a negative record and this tendency has to be reversed in favor of a more environmentally sustainable approach. In this scenario different solutions for energy conversion and storage need to be found: the use of fossil fuels has to be reduced and replace with other and more sustainable forms of energy conversion. At the same time the change has to be guided by an improvement in the current technology for energy conversion to facilitate the transition process. For this purpose, the traditional combustion process can be improved using oxy-fuel conditions, where a stream of pure O2 provided by an oxygen transport membrane is used instead of air and the resulting high concentrated CO2 flue gas is easier to capture. A cleaner form of energy can be obtained using Solid Oxide Reversible Cells (SORCs), highly efficient electrochemical devices able convert chemicals directly into electrical current without production of pollutants. When operated in electrolysis mode, SORCs allow to store electrical energy in the form of fuels, obtained from CO2 reduction.
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