Desenvolvimento de sistema em fluxo empregando ultrassom para remoção de enxofre de óleo diesel

• Ano de defesa: 2011
• Autor(a) principal: Nunes, Matheus Augusto Gonçalves
• Orientador(a): Dressler, Valderi Luiz
• Banca de defesa: Müller, Edson Irineu , Duarte, Fábio Andrei
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Santa Maria
• Programa de Pós-Graduação: Programa de Pós-Graduação em Química
• Departamento: Química
• País: BR
• Palavras-chave em Português: Química; Ultrasson; Óleo diesel
• Área do conhecimento CNPq: CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA
• Link de acesso: http://repositorio.ufsm.br/handle/1/10560

In this work, the development of a continuous flow process for sulfur removal from diesel oil is proposed. The process is based on the application of ultrasonic energy for increasing the oxidation reaction rate of sulfur compounds in presence of oxidizing reagents. For the development of ultrasound-assisted oxidative desulfurization (UAOD) system, parameters such as reagents amount, residence time and solvent for extraction were evaluated. The developed UAOD continuous flow system was applied to three diesel oil containing different total sulfur content and distinct sulfur species. For comparison, a similar process, but using mechanical stirring instead of ultrasound energy was tested to evaluate the ultrasound effect to increasing chemical reactions rates and improve the mass transfer between heterogeneous mixtures. In addition, the milder conditions of temperature and pressure, associated to the capacity for removing refractory sulfur compounds to the hydrodesulfurization process without using hydrogen, it makes the continuous flow UAOD process as a promising alternative for fuel production with lower sulfur content.