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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Desenvolvimento de ze?lita y nanocristalina e aplica??o para degrada??o termocatal?tica de borra oleosa de petr?leo

Silva, Jo?o Manuel R?go 29 June 2017 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-09-05T19:25:26Z No. of bitstreams: 1 JoaoManuelRegoSilva_DISSERT.pdf: 1561950 bytes, checksum: eb2b7dacfcb7c22d8a44cd6461da9588 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-09-13T23:11:18Z (GMT) No. of bitstreams: 1 JoaoManuelRegoSilva_DISSERT.pdf: 1561950 bytes, checksum: eb2b7dacfcb7c22d8a44cd6461da9588 (MD5) / Made available in DSpace on 2017-09-13T23:11:18Z (GMT). No. of bitstreams: 1 JoaoManuelRegoSilva_DISSERT.pdf: 1561950 bytes, checksum: eb2b7dacfcb7c22d8a44cd6461da9588 (MD5) Previous issue date: 2017-06-29 / A borra oleosa (BO) de petr?leo apresenta um agregado complexo de hidrocarbonetos, impurezas org?nicas, inorg?nicas e ?gua. Um dos principais problemas encontrados atualmente na ind?stria petrolifera ? o gerenciamento (acondicionamento, armazenamento, transporte e destino) de res?duos. Os nanomateriais (catalisadores) mesoporosos e microporosos s?o considerados promissores em processos de refino de petr?leo e como adsorventes para prote??o ambiental. O foco deste trabalho foi estudar a BO de petr?leo oriunda do processamento prim?rio, com aplica??o de degrada??o t?rmica e termocatal?tica com nanomateriais, visando a produ??o de derivados de petr?leo. O catalisador NaY foi sintetizado com uma raz?o molar de sil?cio/alum?nio de 50 (Si/Al = 1,5), usando silicato de s?dio (Na2SiO3) como fonte de sil?cio e aluminato de s?dio (NaAlO2) como a fonte de alum?nio e, posteriormente feito uma troca i?nica para obten??o de sua forma ?cida - HY. As amostras dos materiais nanoestruturados foram caracterizadas por analise termogravim?trica (TG/DTG), difra??o de raios X (DRX), microscopia eletr?nica de varredura (MEV), espectroscopia de absor??o na regi?o do infravermelho com transformada de Fourier (FT-IR). A caracteriza??o mostrou que os materiais sintetizados resultaram em um catalisador nano estruturado de acordo com a literatura existente. A degrada??o t?rmica e catal?tica da borra oleosa de petr?leo foi realizada nas faixas de temperatura de 100, 200, 300, 400 e 500 ?C, variando com o tempo de 0 a 60 min para cada temperatura. As curvas obtidas atrav?s da degrada??o, mostram uma deteriora??o mais acelerada da borra oleosa quando existe a presen?a de catalisador no meio. Esses dados foram corroborados pela energia de ativa??o e foram estudados pelos par?metros de Arrhenius, onde foi poss?vel observar a energia de ativa??o para degrada??o t?rmica e termocatal?tica da borra oleosa. / The oily sludge presents a complete aggregate of hydrocarbons, organic and inorganic impurities, and water. One of the main bottlenecks currently found in oil industry it's the manegement (packaging, storage, transportation and destination) of waste. The nanomaterials (catalysts) mesoporous and microporous are considered promissing in oil refining processes and as absorvents to enviromental protection. The focus of this work was study de oily sludge from primary processing, with applications of thermal degradation and thermocatalytic with nanomaterials, aiming the production of oil derivates. The catalyst NaY was sintetized with a silica/aluminum molar ratio of 50 (Si/Al = 1,5), using sodium silicate (Na2SiO3) as source of silicon e sodium aluminate (NaAlO2), as the aluminum source and, posteriorly was done a ion exchange to obtain its acid form - HY. The samples of the nanostructured materials by thermogravimetric analysis (TG/DTG), X-ray diffraction (DRX), scanning electro micorscopy (SEM), absorption spectroscopy in the infrared region with Fourier transform (FT-IR). The characterizations showed that the synthesized materials resulted in a nanostructured catalyest according to the existent literature. The thermal and catalytic degradation of the oily sludge was performed in the temperature ranges of 100, 200, 300, 400 and 500 ?C, varying with time of 0 to 60 min to each temperature. The curves obtained through degradation showed a faster deterioration of oily sludge when there a presence of catalyst on the midst. These datas were corroborated by the activation energy and were studied by Arrhenius parameter, where was possible to observe the activation energy to thermal and thermo-catalytic degradation of the oily sludge.

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