Reordering of Depolymerized Silicates as Adsorbents for Large Nitrogen Compounds
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of the Brazilian Chemical Society (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532021000100207 |
Resumo: | The adsorption capacities of two synthesized zeolites (crystalline ZSM-5 and semi-crystalline faujasite Y) for a mixture of indole, quinoline and carbazole were studied. The different samples obtained show different crystalline degree, mesoporosity and Si/Al ratios. The synthesis procedure is based on the simultaneous depolymerization of a mixture of high surface area silica, such as rice hull ashes (RHA), and a crystalline zeolite, such as clinoptilolite or faujasite. The depolymerization step is followed by a partial reorganization induced by a structure-directing agent. A model mixture of nitrogenous compounds was prepared, then it was mixed with the zeolite samples and the amount adsorbed of nitrogenous compounds was determined by gas chromatography. Analysis of the adsorbed molecules reveals selectivity in favor of quinoline, followed by indole and then carbazole. The best adsorbent properties correspond to the solid with highest porous volume. The samples obtained were characterized by X-ray diffraction, 29Si and 27Al magic-angle spinning nuclear magnetic resonance, X-ray fluorescence and Fourier transform infrared spectroscopy. The Barrett-Joyner-Halenda (BJH) pore size distribution and the Brunauer-Emmet-Teller (BET) surface area values were obtained from N2 adsorption/desorption isotherms. |
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Reordering of Depolymerized Silicates as Adsorbents for Large Nitrogen Compoundsnitrogen compound adsorptionrice hull ashZSM-5faujasite YThe adsorption capacities of two synthesized zeolites (crystalline ZSM-5 and semi-crystalline faujasite Y) for a mixture of indole, quinoline and carbazole were studied. The different samples obtained show different crystalline degree, mesoporosity and Si/Al ratios. The synthesis procedure is based on the simultaneous depolymerization of a mixture of high surface area silica, such as rice hull ashes (RHA), and a crystalline zeolite, such as clinoptilolite or faujasite. The depolymerization step is followed by a partial reorganization induced by a structure-directing agent. A model mixture of nitrogenous compounds was prepared, then it was mixed with the zeolite samples and the amount adsorbed of nitrogenous compounds was determined by gas chromatography. Analysis of the adsorbed molecules reveals selectivity in favor of quinoline, followed by indole and then carbazole. The best adsorbent properties correspond to the solid with highest porous volume. The samples obtained were characterized by X-ray diffraction, 29Si and 27Al magic-angle spinning nuclear magnetic resonance, X-ray fluorescence and Fourier transform infrared spectroscopy. The Barrett-Joyner-Halenda (BJH) pore size distribution and the Brunauer-Emmet-Teller (BET) surface area values were obtained from N2 adsorption/desorption isotherms.Sociedade Brasileira de Química2021-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532021000100207Journal of the Brazilian Chemical Society v.32 n.1 2021reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.21577/0103-5053.20200169info:eu-repo/semantics/openAccessSánchez-Flores,Norma A.Navarrete-Bolaños,JuanPérez-Romo,PatriciaPacheco-Malagón,GracielaLaredo,GeorginaFripiat,José J.eng2021-01-18T00:00:00Zoai:scielo:S0103-50532021000100207Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2021-01-18T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Reordering of Depolymerized Silicates as Adsorbents for Large Nitrogen Compounds |
title |
Reordering of Depolymerized Silicates as Adsorbents for Large Nitrogen Compounds |
spellingShingle |
Reordering of Depolymerized Silicates as Adsorbents for Large Nitrogen Compounds Sánchez-Flores,Norma A. nitrogen compound adsorption rice hull ash ZSM-5 faujasite Y |
title_short |
Reordering of Depolymerized Silicates as Adsorbents for Large Nitrogen Compounds |
title_full |
Reordering of Depolymerized Silicates as Adsorbents for Large Nitrogen Compounds |
title_fullStr |
Reordering of Depolymerized Silicates as Adsorbents for Large Nitrogen Compounds |
title_full_unstemmed |
Reordering of Depolymerized Silicates as Adsorbents for Large Nitrogen Compounds |
title_sort |
Reordering of Depolymerized Silicates as Adsorbents for Large Nitrogen Compounds |
author |
Sánchez-Flores,Norma A. |
author_facet |
Sánchez-Flores,Norma A. Navarrete-Bolaños,Juan Pérez-Romo,Patricia Pacheco-Malagón,Graciela Laredo,Georgina Fripiat,José J. |
author_role |
author |
author2 |
Navarrete-Bolaños,Juan Pérez-Romo,Patricia Pacheco-Malagón,Graciela Laredo,Georgina Fripiat,José J. |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Sánchez-Flores,Norma A. Navarrete-Bolaños,Juan Pérez-Romo,Patricia Pacheco-Malagón,Graciela Laredo,Georgina Fripiat,José J. |
dc.subject.por.fl_str_mv |
nitrogen compound adsorption rice hull ash ZSM-5 faujasite Y |
topic |
nitrogen compound adsorption rice hull ash ZSM-5 faujasite Y |
description |
The adsorption capacities of two synthesized zeolites (crystalline ZSM-5 and semi-crystalline faujasite Y) for a mixture of indole, quinoline and carbazole were studied. The different samples obtained show different crystalline degree, mesoporosity and Si/Al ratios. The synthesis procedure is based on the simultaneous depolymerization of a mixture of high surface area silica, such as rice hull ashes (RHA), and a crystalline zeolite, such as clinoptilolite or faujasite. The depolymerization step is followed by a partial reorganization induced by a structure-directing agent. A model mixture of nitrogenous compounds was prepared, then it was mixed with the zeolite samples and the amount adsorbed of nitrogenous compounds was determined by gas chromatography. Analysis of the adsorbed molecules reveals selectivity in favor of quinoline, followed by indole and then carbazole. The best adsorbent properties correspond to the solid with highest porous volume. The samples obtained were characterized by X-ray diffraction, 29Si and 27Al magic-angle spinning nuclear magnetic resonance, X-ray fluorescence and Fourier transform infrared spectroscopy. The Barrett-Joyner-Halenda (BJH) pore size distribution and the Brunauer-Emmet-Teller (BET) surface area values were obtained from N2 adsorption/desorption isotherms. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532021000100207 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532021000100207 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.21577/0103-5053.20200169 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
dc.source.none.fl_str_mv |
Journal of the Brazilian Chemical Society v.32 n.1 2021 reponame:Journal of the Brazilian Chemical Society (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Journal of the Brazilian Chemical Society (Online) |
collection |
Journal of the Brazilian Chemical Society (Online) |
repository.name.fl_str_mv |
Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
||office@jbcs.sbq.org.br |
_version_ |
1750318183891337216 |