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Previous issue date: 2016-07-26 / A ind?stria de petr?leo gera diferentes res?duos e as ze?litas possuem grande
import?ncia no tratamento e beneficiamento dos res?duos da ind?stria de refino de
petr?leo e petroqu?mica por apresentarem propriedades peculiares. Neste contexto, o
presente trabalho relata o estudo de ze?litas ZSM-5 com estruturas hier?quicas de poros,
sintetizadas utilizando como agente silanizante, o fenilaminopropiltrimetoxisilano
(PHAPTMS) nas concentra??es de 15 mol%, 17 mol% e 20 mol%, visando aplica??o do
melhor material na pir?lise termocatal?tica de res?duos gerados e derivados da ind?stria
de petr?leo. As s?nteses das ZSM-5 tamb?m foram realizadas na aus?ncia de direcionador
org?nico de estutura, assistido pelo m?todo de indu??o por semente na forma de p?,
submetidas a 180 ?C, por 27 h, sendo os per?odos de interrup??o da cristaliza??o em 8,
12 e 16 h para adi??o do PHAPTMS. Os materiais foram sintetizados e caracterizados
pelos m?todos de difra??o de raios X (DRX), espectroscopia na regi?o do infravermelho
por transformada de Fourier (FTIR), an?lise t?rmica (TG/DTG), acidez superficial
medidas atrav?s da dessor??o de n-butilamina por termogravimetria (TG) e FTIR,
microscopia eletr?nica de varredura (MEV) e adsor??o de nitrog?nio. Ainda foi realizado
um estudo do comportamento cin?tico atrav?s da termogravimetria dos RAT, PEAD e
sobre os catalisadores. Atrav?s do modelo cin?tico model-free, utilizando as curvas
integrais TG, foram estimados a energia de ativa??o, as taxas de convers?o e o tempo
degrada??o dos res?duos em fun??o da temperatura. Notou-se que para os materiais
sintetizados com 15 mol% de PHAPTMS nos per?odos de 8, 12 e 16 h apresentaram
maiores concentra??es dos s?tios ativos, acidez superficial, tornando promissores na
degrada??o de PEAD. O estudo cin?tico feito em PEAD pelo m?todo Vyazovkin revelou
uma menor energia de ativa??o para o material HZ5 15 mol% no per?odo de 16 h.
Tamb?m foi revelado um abaixamento da energia de ativa??o quando utilizou esse
material no estudo cin?tico para o RAT. Na pir?lise t?rmica e termocatal?tica dos res?duos
realizadas nas temperaturas de 500 ?C, 475 ?C, 450 ?C. Foi escolhido para aplica??o na
pir?lise termocatal?tica, o material, (HZ5 15 mol% 16 h), por apresentar melhor acidez e
menor energia requerida para a degrada??o de PEAD. Na pir?lise termocatal?tica sobre
PEAD proporcionou seletividade de produtos com valores agregados, os quais podem ser
utilizados na ind?stria petroqu?mica. Na pir?lise termocatal?tica de RAT este material
potencializou as faixas de hidrocarbonetos de C1-C4; C5-C12, C13-C19 referentes ao GLP, gasolina e diesel. Proporcionando melhores cargas no processo e reduzindo os res?duos
gerados durante o refino de petr?leo. / The petroleum industry generates different residues and zeolites are of great
importance in the treatment and processing of residues of the petroleum refining and
petrochemical industry for having peculiar properties. In this context, this paper reports
the zeolites study ZSM-5 with hierarchically structures of pores, synthesized using as
silanizante agent phenylaminopropyl trimethoxysilane (PHAPTMS) at concentrations of
15mol%, 17mol% and 20mol%, aiming at implementing the best material in thermo
catalytic pyrolysis of the waste generated of the petroleum industry. The synthesis of
ZSM-5 were also conducted without organic template, assisted by the seed induction
method in the form of powder, subjected to 180 ?C for 27 h, the crystallization interrupt
periods at 8, 12 and 16 h for addition of PHAPTMS. The materials were synthesized and
characterized by the methods of X-ray diffraction (XRD), infrared spectroscopy (FTIR),
thermal analysis (TG / DTG), surface acidity measured by n-butylamine desorption
thermogravimetric analysis (TG) and FTIR, scanning electron microscopy (SEM),
nitrogen adsorption. The kinetic study by thermogravimetry of pure RAT and HDPE
waste was performed with and without catalyst. Through model-free kinetic method using
the integral curves TG, were estimated activation energy, conversion rates and time
degradation of waste in function of temperature. It was noted that for the materials
synthesized with 15mol% of PHAPTMS in periods of 8, 12 and 16h showed higher
concentrations of the active sites, surface acidity, making promising in HDPE
degradation. The kinetic study of HDPE by Vyazovkin method showed a lower activation
energy for the HZ5 15mol% material in the 16 h period. Also a lowering of the activation
energy was revealed when used this material in the kinetic study for the RAT. In the
thermal pyrolysis and thermalcatalytic of waste carried out at temperatures of 500 ?C,
475 ?C, 450 ?C. It was chosen for use in thermalcatalytic pyrolysis, the material (HZ5
15mol% 16h) due to better acidity and lower energy required for the degradation of
HDPE. In thermalcatalytic pyrolysis of HDPE selectivity afforded products with added
values, which can be used in the petrochemical industry. In thermalcatalytic pyrolysis
RAT This material potentiated C1-C4 hydrocarbon groups; C5-C12, C13-C19 regarding the
LPG, gasoline and diesel. Providing better loads in the process and reducing the waste
generated during petroleum refining.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/22340 |
| Date | 26 July 2016 |
| Creators | Lima, Regineide de Oliveira |
| Contributors | 35530502415, http://lattes.cnpq.br/9770622597949866, Gondim, Amanda Duarte, 03014598437, http://lattes.cnpq.br/6738828245487480, Ribeiro, Marcilio Pelicano, 03444901496, http://lattes.cnpq.br/0948271484684401, Santos, Nataly Albuquerque dos, 05640620498, http://lattes.cnpq.br/3104121895000367, Fernandes J?nior, Valter Jos?, Ara?jo, Antonio Souza de |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM CI?NCIA E ENGENHARIA DE PETR?LEO, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| 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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