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Advisor(s)
Abstract(s)
O presente trabalho reflete a importância que o hidrogénio tem, e o papel que poderá vir a desempenhar num futuro não muito distante, bem como os métodos de produção atuais e as alternativas existentes. A eletrólise com plasma é uma das alternativas em desenvolvimento e tem sido apontado por vários investigadores como um método propício a atingir elevadas taxas de produção de hidrogénio face aos valores de corrente ensaiados e sem qualquer emissão de CO2. Por estes motivos, foi este o método alternativo de produção escolhido como tema central do presente trabalho. Para iniciar este estudo foi desenvolvido um eletrolisador que permitisse realizar a eletrólise convencional e a eletrólise com plasma DC, nos mesmos parâmetros laboratoriais, para que se possa comparar os resultados e aferir os benefícios do processo. Os ensaios realizados com eletrólise convencional permitirão não só caracterizar o funcionamento do eletrolisador, como também verificar a Lei de Faraday e recolher informações para o desenvolvimento de um modelo matemático do eletrolisador. Os dados registados permitirão observar de que modo a temperatura e densidade de corrente influenciam o desempenho do eletrolisador. Após a realização dos ensaios com plasma DC para três tensões diferentes, será também traçado um perfil de desempenho energético do eletrolisador e comparado com o obtido nos ensaios com eletrólise convencional.
The present work reflects the importance that hydrogen has and the role that it could play in a not-too-distant future, as well as the current methods of production and the existing alternatives on the market and currently under development. Plasma electrolysis is one of the alternatives under development and has been pointed out by several researchers as a method capable of achieving high rates of hydrogen production compared to the current values tested and without CO2 emissions. For this reason, this production method was chosen as the central theme of this dissertation. To begin the study of this production method, an electrolyzer was built that allow conventional and DC plasma electrolysis to be carried out in the same experimental parameters, so that the results can be compared and the benefits of the process can be assessed. The tests carried out with conventional electrolysis allowed to characterize the operation of the electrolyzer, verify Faraday's Law and extract data for the development of a mathematical model of the electrolyzer. The recorded data also allowed to observe how temperature and current density influence the performance of the electrolyzer. After carrying out experiments with DC plasma for three different voltages, an energy performance profile of the electrolyzer was also drawn and compared with that obtained in the tests with conventional electrolysis.
The present work reflects the importance that hydrogen has and the role that it could play in a not-too-distant future, as well as the current methods of production and the existing alternatives on the market and currently under development. Plasma electrolysis is one of the alternatives under development and has been pointed out by several researchers as a method capable of achieving high rates of hydrogen production compared to the current values tested and without CO2 emissions. For this reason, this production method was chosen as the central theme of this dissertation. To begin the study of this production method, an electrolyzer was built that allow conventional and DC plasma electrolysis to be carried out in the same experimental parameters, so that the results can be compared and the benefits of the process can be assessed. The tests carried out with conventional electrolysis allowed to characterize the operation of the electrolyzer, verify Faraday's Law and extract data for the development of a mathematical model of the electrolyzer. The recorded data also allowed to observe how temperature and current density influence the performance of the electrolyzer. After carrying out experiments with DC plasma for three different voltages, an energy performance profile of the electrolyzer was also drawn and compared with that obtained in the tests with conventional electrolysis.
Description
Trabalho final de Mestrado para obtenção do grau de Mestre em Engenharia de Automação e Eletrónica Industrial
Keywords
Eletrólise Hidrogénio Plasma Rendimento de Faraday Electrolysis Hydrogen Plasma Faradic efficiency
Citation
GONÇALVES, André Duque - Diagnóstico da produção de H2 num eletrolisador com base num plasma. Lisboa: Instituto Superior de Engenharia de Lisboa, 2023. Dissertação de Mestrado.