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Abstract(s)
Neste trabalho é apresentado o gás Hidrogénio como uma tecnologia alternativa promissora que permitirá alcançar as metas ambientais definidas pelas várias indústrias. Através da eletrólise é possível a produção de Hidrogénio verde, uma opção energeticamente sustentável e economicamente viável, em comparação com outros métodos de produção. Nesse sentido, no presente trabalho exploratório estudou-se dois métodos de produção de Hidrogénio a partir da eletrólise: método convencional e método de plasma. Este estudo teve como principal objetivo a diminuição de energia elétrica necessária do processo. Como tal, foi contruído um eletrolisador, de escala laboratorial, para realização de ensaios experimentais. Para o estudo do método convencional foi desenvolvido, em MATLAB, um modelo matemático de uma eletrólise de base alcalina, modelando os processos físicos associados ao processo. Os ensaios experimentais permitiram obter dados do comportamento do eletrolisador durante o processo e a validação do modelo matemático. Foi analisada a evolução da tensão em função da temperatura e a taxa de
produção de Hidrogénio em função da corrente e concluído que o modelo simula o processo com bastante precisão. No estudo do método de plasma foi conseguida a produção de Hidrogénio e foram comparados os resultados obtidos com o método convencional. O rendimento de Faraday através do método de plasma foi superado em 1168,75%. Foi também
demonstrado que o consumo energético através deste método é menor para a mesma produção de Hidrogénio. O método de plasma apresenta um método inovador para melhorar a produção de Hidrogénio e também para diminuir o consumo de energia.
In this work, Hydrogen gas is presented as a promising alternative technology that will allow the achievement of the environmental goals set by several industries. Through electrolysis, it is possible the production of green Hydrogen, an energetically sustainable and economically viable option compared with other production methods. In this sense, two hydrogen production methods from electrolysis were studied in the present exploratory work: the conventional and the plasma methods. This study's main objective is to reduce the necessary electric energy of the process. As such, a laboratory-scale electrolyzer was built to perform experimental tests. For the study of the conventional method, a mathematical model of alkaline electrolysis was developed, in MATLAB, modeling the physical processes associated to the process. The experimental tests allowed for obtaining data on the electrolyzer´s behavior during the process and validating the mathematical model. The evolution of voltage as a function of temperature and the hydrogen production rate as a function of current were analysed, and it was concluded that the model simulates the process quite accurately. In the study of the plasma method, Hydrogen production was achieved, and the results obtained were compared with the conventional method. The Faraday efficiency through the plasma method was exceeded by 1168.75%. It was also shown that the energy consumption through this method is less for the same Hydrogen production. The plasma method presents an innovative approach to improve Hydrogen production and decrease energy consumption.
In this work, Hydrogen gas is presented as a promising alternative technology that will allow the achievement of the environmental goals set by several industries. Through electrolysis, it is possible the production of green Hydrogen, an energetically sustainable and economically viable option compared with other production methods. In this sense, two hydrogen production methods from electrolysis were studied in the present exploratory work: the conventional and the plasma methods. This study's main objective is to reduce the necessary electric energy of the process. As such, a laboratory-scale electrolyzer was built to perform experimental tests. For the study of the conventional method, a mathematical model of alkaline electrolysis was developed, in MATLAB, modeling the physical processes associated to the process. The experimental tests allowed for obtaining data on the electrolyzer´s behavior during the process and validating the mathematical model. The evolution of voltage as a function of temperature and the hydrogen production rate as a function of current were analysed, and it was concluded that the model simulates the process quite accurately. In the study of the plasma method, Hydrogen production was achieved, and the results obtained were compared with the conventional method. The Faraday efficiency through the plasma method was exceeded by 1168.75%. It was also shown that the energy consumption through this method is less for the same Hydrogen production. The plasma method presents an innovative approach to improve Hydrogen production and decrease energy consumption.
Description
Trabalho Final de Mestrado para obtenção do grau de Mestre em Engenharia Eletrotécnica – Ramo de Automação e Eletrónica Industrial
Keywords
Produção de hidrogénio Eletrólise Eletrólise de plasma Rendimento de Faraday Eletrolisador Modelo matemático Energia Hydrogen production Electrolysis Plasma electrolysis Faraday efficiency Electrolyzer Mathematical model Energy
Citation
ALVES, Vasco Miguel Eugénio – Modelação da Produção de Hidrogénio num Eletrolisador com base num Plasma. Lisboa: Instituto Superior de Engenharia de Lisboa. 2023. Dissertação de Mestrado.
Publisher
Instituto Superior de Engenharia de Lisboa