Organic structure-directing agents in SAPO synthesis: the case of 2-ethyl-1,3,4-trimethylimidazolium

Structure direction is a key topic in zeolite synthesis. In this work, the organic cation 2‐ethyl‐1,3,4‐trimethylimidazolium was studied for the first time in the synthesis of SAPO zeolite. Concentrated gels and fluoride media were chosen for the synthesis. To understand the formation of the main pr...

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Principais autores:	Pergher, Sibele Berenice Castellã, Vinaches, Paloma
Formato:	article
Idioma:	English
Publicado em:	Wiley
Assuntos:	Structure‐directing agents Zeolites Aluminosilicates Microporous materials Synthetic methods
Endereço do item:	https://repositorio.ufrn.br/jspui/handle/123456789/29591
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spelling	ri-123456789-295912022-05-20T18:42:25Z Organic structure-directing agents in SAPO synthesis: the case of 2-ethyl-1,3,4-trimethylimidazolium Pergher, Sibele Berenice Castellã Vinaches, Paloma Structure‐directing agents Zeolites Aluminosilicates Microporous materials Synthetic methods Structure direction is a key topic in zeolite synthesis. In this work, the organic cation 2‐ethyl‐1,3,4‐trimethylimidazolium was studied for the first time in the synthesis of SAPO zeolite. Concentrated gels and fluoride media were chosen for the synthesis. To understand the formation of the main products, CHA and LTA zeotypes, several statistical calculi were performed, and the results showed that the structure direction of the LTA zeotype was mainly caused by to the organic cation. For SAPO‐CHA, the temperature and a combination of dilution and synthesis time also influenced the formation. The CHA zeotype was studied thoroughly by other techniques such as thermogravimetry, high‐power decoupled (HPDEC) magic‐angle spinning (MAS) NMR spectroscopy, and nitrogen sorption. We calculated that this zeotype contains one cation per unit cell and observed that the fluoride medium also directs the structure. The silicon atoms in SAPO‐CHA are present in three states [SiO(4X), SiO(3X), and SiO(1X)], aluminium atoms were found in tetrahedral and octahedral coordination environments, and the phosphorus atoms also had tetrahedral geometries. Textural analysis confirmed the formation of a microporous material with a Brunauer–Emmett–Teller (BET) surface are of 510 m2 g–1 and an external surface of 110 m2 g–1 2020-07-14T01:20:44Z 2020-07-14T01:20:44Z 2018-01-23 article VINACHES, Paloma; PERGHER, Sibele Berenice Castellã. Organic Structure-Directing Agents in SAPO Synthesis: the case of 2-ethyl-1,3,4-trimethylimidazolium. European Journal of Inorganic Chemistry, [s.l.], v. 2018, n. 2, p. 123-130, 23 out. 2017. ISSN 1099-0682 versão online. Disponível em: https://chemistry-europe.onlinelibrary.wiley.com/doi/abs/10.1002/ejic.201701002. Acesso em: 13 jul. 2020. http://dx.doi.org/10.1002/ejic.201701002. 1434-1948 (Print), 1099-0682 (online) https://repositorio.ufrn.br/jspui/handle/123456789/29591 10.1002/ejic.201701002 en Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ Wiley
institution	Repositório Institucional
collection	RI - UFRN
language	English
topic	Structure‐directing agents Zeolites Aluminosilicates Microporous materials Synthetic methods
spellingShingle	Structure‐directing agents Zeolites Aluminosilicates Microporous materials Synthetic methods Pergher, Sibele Berenice Castellã Vinaches, Paloma Organic structure-directing agents in SAPO synthesis: the case of 2-ethyl-1,3,4-trimethylimidazolium
description	Structure direction is a key topic in zeolite synthesis. In this work, the organic cation 2‐ethyl‐1,3,4‐trimethylimidazolium was studied for the first time in the synthesis of SAPO zeolite. Concentrated gels and fluoride media were chosen for the synthesis. To understand the formation of the main products, CHA and LTA zeotypes, several statistical calculi were performed, and the results showed that the structure direction of the LTA zeotype was mainly caused by to the organic cation. For SAPO‐CHA, the temperature and a combination of dilution and synthesis time also influenced the formation. The CHA zeotype was studied thoroughly by other techniques such as thermogravimetry, high‐power decoupled (HPDEC) magic‐angle spinning (MAS) NMR spectroscopy, and nitrogen sorption. We calculated that this zeotype contains one cation per unit cell and observed that the fluoride medium also directs the structure. The silicon atoms in SAPO‐CHA are present in three states [SiO(4X), SiO(3X), and SiO(1X)], aluminium atoms were found in tetrahedral and octahedral coordination environments, and the phosphorus atoms also had tetrahedral geometries. Textural analysis confirmed the formation of a microporous material with a Brunauer–Emmett–Teller (BET) surface are of 510 m2 g–1 and an external surface of 110 m2 g–1
format	article
author	Pergher, Sibele Berenice Castellã Vinaches, Paloma
author_facet	Pergher, Sibele Berenice Castellã Vinaches, Paloma
author_sort	Pergher, Sibele Berenice Castellã
title	Organic structure-directing agents in SAPO synthesis: the case of 2-ethyl-1,3,4-trimethylimidazolium
title_short	Organic structure-directing agents in SAPO synthesis: the case of 2-ethyl-1,3,4-trimethylimidazolium
title_full	Organic structure-directing agents in SAPO synthesis: the case of 2-ethyl-1,3,4-trimethylimidazolium
title_fullStr	Organic structure-directing agents in SAPO synthesis: the case of 2-ethyl-1,3,4-trimethylimidazolium
title_full_unstemmed	Organic structure-directing agents in SAPO synthesis: the case of 2-ethyl-1,3,4-trimethylimidazolium
title_sort	organic structure-directing agents in sapo synthesis: the case of 2-ethyl-1,3,4-trimethylimidazolium
publisher	Wiley
publishDate	2020
url	https://repositorio.ufrn.br/jspui/handle/123456789/29591
work_keys_str_mv	AT perghersibeleberenicecastella organicstructuredirectingagentsinsaposynthesisthecaseof2ethyl134trimethylimidazolium AT vinachespaloma organicstructuredirectingagentsinsaposynthesisthecaseof2ethyl134trimethylimidazolium
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Organic structure-directing agents in SAPO synthesis: the case of 2-ethyl-1,3,4-trimethylimidazolium

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