2014-01-142014-01-142012-05-07SARAIVA, Augusto Cesar Fonseca. Análise do enxofre corrosivo em óleo mineral isolante e remoção do dibenzil dissulfeto com nanotubos de carbono baseados em matriz metálica. 2012. 128 f. Orientador: Jordan Del Nero. Tese (Doutorado em Engenharia Elétrica) - Instituto de Tecnologia,, Universidade Federal do Pará, Belém, 2012. Disponível em: http://repositorio.ufpa.br/jspui/handle/2011/4597. Acesso em:.https://repositorio.ufpa.br/handle/2011/4597Unexpected failures in transformers led to the identification of copper sulphide formation, deposited on the conductors. The qualitative presence evaluation of corrosive sulfur in insulating mineral oil, led to a change in the Brazilian standards ABNT NBR 10505, which assesses the presence of corrosive sulfur in mineral oil, change in the time and test temperature to 150 °C / 48 hours. Performing the chemical speciation of organosulfur compounds (by gas chromatography coupled to mass spectrometry), were found 13 compounds in the Nynas oil and 9 compounds in the Petrobras oil. DBDS, which was found only in the Nynas oil, and it was the compound with the highest concentration. To perform the determination of the presence of DBDS in insulating mineral oil, a method by gas chromatography coupled to mass spectrometry was developed, and it was possible to quantify the amount of DBDS in insulating mineral oil samples derived from the power transformer. The passivation process by tolutriazol and benzotriazol, used as anticorrosive additives in the core of electrical equipament, was evaluated; after a while the effect of the addition of passivating agent becomes ineffective with time. The solution for the remotionl of DBDS from mineral oil was realized by using carbon nanotube reinforced by metallic matrix as agent to remove the DBDS. It was found that the adsorption agent was able to realize the complete DBDS remotion from insulating mineral oil up to a volume of 4000 mL (oil contaminated with DBD).porAcesso AbertoÓleo mineral isolanteAdsorçãoDibenzildisulfetoNanotubos de carbonoAdsorptionDibenzyldisulfideMineral oil insulatorCarbon nanotubesTeseCNPQ::ENGENHARIAS::ENGENHARIA ELETRICA::SISTEMAS ELETRICOS DE POTENCIA