Título principal
Produção de Biogás [recurso eletrônico]: dessulfurização por microaeração e purificação com hidrogênio exógeno por eletrólise da água / Suellen Battiston ; orientador, Ricardo Antonio Franscisco Machado ; coorientador, Fabrício Luiz Faita ; coorientador, Odorico Konrad
Data de publicação
2024
Descrição física
117 p. : il.
Nota
Disponível somente em versão on-line.
Tese (doutorado) – Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Química, Florianópolis, 2024.
Inclui referências.
Produção de Biogás [recurso eletrônico]: dessulfurização por microaeração e purificação com hidrogênio exógeno por eletrólise da água / Suellen Battiston ; orientador, Ricardo Antonio Franscisco Machado ; coorientador, Fabrício Luiz Faita ; coorientador, Odorico Konrad
Data de publicação
2024
Descrição física
117 p. : il.
Nota
Disponível somente em versão on-line.
Tese (doutorado) – Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Química, Florianópolis, 2024.
Inclui referências.
Abstract: Currently, most part of energy comes from fossil fuels and the use of non-renewable sources implies the release of tons of CO2, which is related to the global warming. In this context, biogas emerges as a clean energy alternative and one of the most discussed paths in recent years for negative carbon emissions. Biogas has great versatility and can be use in different ways, but new alternatives need to be strategically explored to consolidate biogas potential. For instance, biomethane, the largest constituent of biogas, can become a supplier and transporter of H2. Based on that, one of the greatest challenges is to increase the biogas value by removing its impurities, once they are a significant problem affecting its performance. The main impurities of biogas are carbon dioxide and hydrogen sulfide. In this context, the biogas upgrading with exogenous hydrogen is promising in a long-term perspective, increasing the methane content in biogas through the conversion of CO2. Moreover, the hydrogen used could be a way to store and transport the energy from intermittent power plants. Therefore, this work aims to evaluate the biogas production by monitoring the desulfurization process using microaeration technique in a real plant and to study in lab scale the biogas upgrading by adding exogenous hydrogen. To monitor the desulfurization process, small amounts of ambient air were added to bioreactors with a volumetric capacity of 4000 m3 each, it was possible to obtain a 99.5% hydrogen sulfide removal efficiency, without a significant reduction in the final methane content. The addition of exogenous hydrogen, evaluated on a laboratory scale, also contributed to the purification of biogas, increasing the methane content by around 11% to 16% in the reactors that received hydrogen. Furthermore, the present study evaluates the potential supply of hydrogen by photoeletrochemical cells, process that is receiving attention in literature and more studies are being developed to increase the efficiency of the conversion. To this end, in this study the ferroelectric materials KNbO3 and KBNNO were synthesized with different doping levels, with the aim of investigating the properties of the perovskite group and evaluating their contribution to hybrid structures for the formation of photocathodes. Thus, in terms of technological development, this work aims to contribute to the field of clean energy, especially hydrogen and biogas, as alternatives to the energy transition.