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Previous issue date: 2010-07-30 / The current natural gas production of 52 Mm3d-1 and the large projects for its
expansion has been setting new boundaries for the Brazilian industry of oil and gas. So far,
one of the biggest challenges regards to the logistics for gas transportation from offshore
fields. Therefore, the transformation of natural gas into gasoline, diesel and/or olefins via
Fischer-Tropsch synthesis would be an alternative to this matter. In this work, the production
of hydrocarbons by Fischer-Tropsch synthesis in a slurry reactor was investigated and a
perovskite-type catalyst (LayCu0,4Fe0,6O3 ? d) was used with y varying from 0 to 1 on a
molar basis. In addition, Nb2O5 support was also applied in order to observe the selectivity of
the produced hydrocarbons by the Fischer-Tropsch process. It is shown that the hydrogen
conversion was influenced by the support as well as the different phases of the samples. The
kinetic results for the CO2 production suffered great influence with the introduction of the
Nb2O5 support throughout the series of samples studied. The catalysts allowed obtaining welldefined
cuts of hydrocarbons in the range of C1-C6 and C17-C28, and these results were clearly
influenced by the support and the lanthanum content. The higher olefin/paraffin ratio obtained
was 1.8 when using a non-supported perovskite with y equal to 0.8. This would indicate the
suitability of using this material for the production of olefins / A produ??o atual de 52 milh?es m?dia-1 de g?s natural e os grandes projetos para
esta expans?o vem estabelecendo novas fronteiras para a ind?stria nacional de petr?leo e g?s,
sendo um dos maiores desafios a log?stica para o transporte do g?s oriundo de campos
offshore. Uma alternativa seria usar o g?s natural para a produ??o de gasolina, diesel e/ou
olefinas atrav?s da s?ntese de Fischer-Tropsch. No desenvolvimento deste trabalho foi
investigado a produ??o de hidrocarbonetos via s?ntese de Fischer-Tropsch em um reator
slurry mediante uso de catalisadores do tipo perovskita, LayCu0,4Fe0,6O3?d, onde y sofreu
varia??o de 0 at? 1 em base molar. A s?ntese dos catalisadores levou em considera??o o
estudo da influ?ncia do teor de lant?nio e do suporte (Nb2O5) na atividade e seletividade da
rea??o de Fischer-Tropsch, objetivando a produ??o de hidrocarbonetos. As convers?es de H2
foram sensivelmente influ?nciadas pela presen?a de fases existentes em cada amostra, assim
como pelo suporte. Os resultados da cin?tica de produ??o de CO2 sofreram grandes
influ?ncias com a introdu??o do suporte em toda a s?rie das amostras produzidas. Os
catalisadores empregados permitiram a obten??o de cortes bem definidos de hidrocarbonetos
na faixa de C1-C6 e C17-C28, sendo estes resultados claramente influenciados pelo suporte e
pela varia??o do teor de lant?nio. A maior rela??o olefina/parafina obtida foi de 1,8 para a
perovskita com y igual a 0,8 na amostra n?o suportada, viabilizando o uso deste material na
produ??o de olefinas
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/15905 |
| Date | 30 July 2010 |
| Creators | Souza, Jos? Roberto de |
| Contributors | CPF:04514998320, http://lattes.cnpq.br/5840621182000517, Silva, Antonio Osimar Sousa da, CPF:96668253415, http://lattes.cnpq.br/5289388662589522, Santos, Luiz Carlos Lobato dos, CPF:90455886415, http://lattes.cnpq.br/8891045064075199, Garnica, Alfredo Ismael Curbelo, CPF:05227790779, http://lattes.cnpq.br/0257037690238235, Ferreira, Sebasti?o Ribeiro, CPF:27345386600, http://lattes.cnpq.br/7849019313801150, Ruiz, Juan Alberto Chavez, Melo, Marcus Ant?nio de Freitas |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Engenharia Qu?mica, UFRN, BR, Pesquisa e Desenvolvimento de Tecnologias Regionais |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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