Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
EXERGY ANALYSIS OF CARBON DIOXIDE CAPTURE USING RENEWABLE SOURCES
Submission Author:
Petra Margot Pedraza , SP
Co-Authors:
Petra Margot Pedraza, Carlos Eduardo Keutenedjian Mady, Juliana Cenzi
Presenter: Carlos Eduardo Keutenedjian Mady
doi://10.26678/ABCM.COBEM2019.COB2019-0651
Abstract
In order to meet the world's energy demands in a cleaner way, the use of renewable energy resources has now been implemented and expanded. However, some of the renewable energies can suffer from problems related to intermittency and seasonality, as with those using solar, water and wind resources. One way to solve generation fluctuations that may not fit the demands is the conversion and storage in other forms of energy, which allows the creation of a reservoir until there is a demand that cannot be supplied by the instantaneous production of energy only. This work aims at calculating the relation between the electric power needed to transform the CO2 produced on a cement plant on CH4 and the exergy efficiency of a power-to-methane generation process. The control volume includes electrolysis, methanation, CO2 capture and the cement production processes. Regarding the methanation, to the CH4 production it is used the hydrogen provenient from the water electrolysis and the carbon dioxide proceeding from a cement factory. The exergy efficiency found for the whole composition of processes is 48%.
Keywords
exergy, Thermodynamics, Power-to-gas, energy storage
