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Previous issue date: 2014-05-23 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / This work reports the synthesis of zeolites with different compositions (pure silica,
Si/Ti and Si/Al), via hydroxide and fluoride medium using the cation 1-butyl-3-
methylimidazolium as structure directing agent. Initially, the cation was synthesized in
chloride form and used for the synthesis in hydroxide medium. An anion-exchange (Cl- for
OH-) was required for the synthesis in fluoride medium. Different reactants were used for the
formation of gels synthesis, resulting in the crystallization of MFI and TON phases, the latter
predominant in many compositions. The cation and synthesized zeolites obtained were
characterized by different techniques such as NMR, TG/DTG, XRD, SEM, N2 adsorption and
desorption, DRS and EPMA. Besides characterizing the cation and zeolites, the mother liquor
of hydroxide synthesis was characterized and it was possible to observe a modification of the
cation in the synthesis conditions employed. The materials synthesized in this work can be
applied in catalytic reactions and adsorption / Este trabalho relata a s?ntese de ze?litas de diferentes composi??es (puramente
sil?cicas, Si/Ti e Si/Al), via meio b?sico e fluor?drico, utilizando o c?tion 1-butil-3-
metilimidaz?lio como agente direcionador de estrutura. Inicialmente o c?tion foi sintetizado e
utilizado na forma de cloreto para as s?nteses em meio b?sico e uma troca ani?nica (Cl- para
OH-) foi necess?ria para as s?nteses em meio fluor?drico. Diferentes reagentes foram
empregados para a forma??o dos g?is de s?ntese, resultando na cristaliza??o das fases MFI e
TON, esta ?ltima predominante em muitas composi??es de gel testadas. O c?tion sintetizado e
as ze?litas obtidas foram caracterizados por diferentes t?cnicas, como RMN, TG/DTG, DRX,
MEV, adsor??o e dessor??o de N2, DRS e EPMA. Al?m de caracterizar o c?tion e as ze?litas,
a ?gua-m?e das s?nteses em meio b?sico foi caracterizada e foi poss?vel verificar uma
modifica??o do c?tion nas condi??es de s?ntese empregadas. Os materiais sintetizados neste
trabalho podem ser aplicados em rea??es catal?ticas e de adsor??o
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/17751 |
| Date | 23 May 2014 |
| Creators | Lopes, Christian Wittee |
| Contributors | CPF:50942611004, http://lattes.cnpq.br/5249001430287414, Pastore, Heloise de Oliveira, CPF:06875569884, http://lattes.cnpq.br/3259546601542310, Mignoni, Marcelo Luis, CPF:00215682009, http://lattes.cnpq.br/4100312412618474, Nu?ez, Alejandro Eusebio Rojas, http://lattes.cnpq.br/2543815919001659, Pergher, Sibele Berenice Castella |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Qu?mica, UFRN, BR, F?sico-Qu?mica; Qu?mica |
| 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/openAccess |
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