Made available in DSpace on 2014-12-17T14:08:53Z (GMT). No. of bitstreams: 1
JussyaraDMA_DISSERT_PARCIAL.pdf: 4692370 bytes, checksum: 475e965cf0951180f8df9ac44768b423 (MD5)
Previous issue date: 2012-12-14 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The growing world demand for energy supplied by fossil fuels, a major contributor to
the emission of pollutants into the atmosphere and causing environmental problems,
has been encouraging governments and international organizations to reflect and
encourage the use of alternative renewable sources. Among these new possibilities
deserves attention biodiesel, fuel cleaner and easy to reproduce. The study of new
technologies involving that source is necessary. From this context, the paper aims at
analyzing the thermal stability by thermogravimetric analysis, of the waste generated
from atmospheric distillation of mixtures with ratios of 5, 10, 15 and 20% palm
biodiesel in diesel with and without addition of BHT antioxidant. It was synthesized
biodiesel through palm oil, via homogeneous catalysis in the presence of KOH, with
and without the use of BHT and subsequently added to the diesel common indoor type
(S1800) from a gas station BR. The diesel was already added with 5% biodiesel, and
thus the proportions used for these blends were subtracted from the existing ratio in
diesel fuel, resulting in the following proportions palm oil biodiesel: 0% (B5), 5%
(B10), 10 % (B15) and 15% (B20). From atmospheric distillation analysis, performed
in mixtures with and without BHT were collected residue generated by each sample
and performed a thermal study from the thermogravimetric analysis at a heating rate of
10 ?C.min-1, nitrogen atmosphere and heating to 600 ? C. According to the
specifications of Resolution No. 7/2008 for biodiesel, it was found that the material
was synthesized in accordance with the specifications. For mixtures, it was noted that
the samples were in accordance with the ANP Resolution No. 42/2009. Given the TG /
DTG curves of the samples of waste mixtures with and without BHT antioxidant was
able to observe that they showed a single stage of thermal decomposition attributed to
decomposition of heavy hydrocarbons and esters and other heavier constituents of the
waste sample weighed. The thermal behavior of residues from atmospheric distillation
of mixtures of diesel / biodiesel is very important to understand how this affects the
proper functioning of the engine. A large amount of waste can generate a high content
of particulate material, coke formation and carbonaceous deposits in engine valves,
compromising their performance / A crescente demanda mundial por energia fornecida pelos combust?veis f?sseis, um
dos principais respons?veis pela emiss?o de poluentes ? atmosfera e causadores de
problemas ambientais, vem estimulando governos e Organismos internacionais a
refletir e incentivar o uso de fontes alternativas renov?veis. Dentre essas novas
possibilidades merece destaque o biodiesel, combust?vel menos poluente e de f?cil
reprodutibilidade. O estudo de novas tecnologias envolvendo essa fonte faz-se
necess?rio. Partindo desse contexto, o trabalho tem como objetivo principal analisar a
estabilidade t?rmica, por meio da An?lise Termogravim?trica, dos res?duos gerados da
destila??o atmosf?rica das misturas com propor??es de 5, 10, 15 e 20 % de biodiesel
de dend? no diesel com e sem a adi??o de antioxidante BHT. Sintetizou-se o biodiesel
atrav?s do ?leo de dend?, via cat?lise homog?nea na presen?a de KOH, com e sem o
uso de BHT, e posteriormente, adicionou-se ao diesel comum do tipo interior (S1800)
proveniente de um posto de gasolina BR. Este diesel j? estava aditivado com 5 % de
biodiesel, sendo assim, as propor??es utilizadas para estas misturas foram subtra?das
da propor??o existente no diesel, resultando nas seguintes propor??es de biodiesel de
dend?: 0% (B5), 5% (B10), 10% (B15) e 15% (B20). Da an?lise de Destila??o
Atmosf?rica, realizada nas misturas com e sem BHT, foram coletados o res?duo gerado
por cada amostra e efetuado um estudo t?rmico, a partir da An?lise
Termogravim?trica, na raz?o de aquecimento de 10 ?C.min-1, atmosfera de nitrog?nio
e aquecimento at? 600 ?C. De acordo com as especifica??es da Resolu??o N? 7/2008
para o biodiesel, foi constatado que o material sintetizado estava em conformidade
com as especifica??es. No tocante ?s misturas, notou-se que as amostras estavam de
acordo com a Resolu??o da ANP N? 42/2009. Diante das curvas TG/DTG das
amostras de res?duos das misturas com e sem antioxidante BHT, p?de observar que
estas apresentaram uma ?nica etapa de decomposi??o t?rmica atribu?da ?
decomposi??o dos hidrocarbonetos pesados e dos ?steres met?licos pesados e outros
constituintes pesados da amostra de res?duo. O estudo do comportamento t?rmico do
res?duo gerado da destila??o atmosf?rica das misturas de ?leo diesel/biodiesel ? de
grande relev?ncia para entendermos o qu?o este interfere no bom funcionamento do
motor. Uma grande quantidade de res?duos pode gerar um alto teor de material
particulado, forma??o de coque e dep?sitos carbon?ceos nas v?lvulas do motor,
comprometendo seu desempenho
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/12982 |
| Date | 14 December 2012 |
| Creators | Aires, Jussyara Dalianne Martins |
| Contributors | CPF:35530502415, http://lattes.cnpq.br/9770622597949866, Gondim, Amanda Duarte, CPF:03014598437, http://lattes.cnpq.br/6738828245487480, Coriolano, Ana Catarina Fernandes, CPF:83744479404, http://lattes.cnpq.br/5552621403067808, Ara?jo, Ant?nio Souza de |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Ci?ncia e Engenharia do Petr?leo, UFRN, BR, Pesquisa e Desenvolvimento em Ci?ncia e Engenharia de Petr?leo |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/embargoedAccess |
Page generated in 0.0028 seconds