Synthesis of the MCM-22 zeolite precursor and thermal, deslamination and acidification modifications
In this work, the precursor (P)MCM-22 was prepared using the hydrothermal method in a static system and thermal modifications, delamination and acidification were carried out. This study aims to optimize the modification that promotes the disorganization of the zeolitic precursor lamellae and makes...
| Authors: | ; ; ; |
|---|---|
| Format: | Article |
| Status: | Published version |
| Publication date: | 2021 |
| Country: | Brasil |
| Institution: | UNIFEI |
| Repository: | Research, Society and Development |
| Language: | Portuguese |
| OAI Identifier: | oai:ojs.pkp.sfu.ca:article/22539 |
| Online Access: | https://rsdjournal.org/index.php/rsd/article/view/22539 |
| Access Level: | Open access |
| Keyword: | Síntesis Precursor (P)MCM-22 MCM-22 Calcinación Delaminación Acidification. Synthesis Calcination Deslaminação Acidificação. Síntese Calcinação |
| _version_ | 1878757068747309056 |
|---|---|
| author | Lima, Wellington Siqueira |
| author2 | Silva, Francisco Alex de Sousa Quintela, Paulo Henrique Leite Rodrigues, Meiry Gláucia Freire |
| author2_role | author author author |
| author_browse | Lima, Wellington Siqueira Quintela, Paulo Henrique Leite Rodrigues, Meiry Gláucia Freire Silva, Francisco Alex de Sousa |
| author_facet | Lima, Wellington Siqueira Silva, Francisco Alex de Sousa Quintela, Paulo Henrique Leite Rodrigues, Meiry Gláucia Freire |
| author_role | author |
| collection | Research, Society and Development |
| description | In this work, the precursor (P)MCM-22 was prepared using the hydrothermal method in a static system and thermal modifications, delamination and acidification were carried out. This study aims to optimize the modification that promotes the disorganization of the zeolitic precursor lamellae and makes the active sites more accessible. The precursor (P)MCM-22 was prepared under hydrothermal conditions with a temperature of 150 oC and a crystallization time of 7 days. The delamination process was carried out via swelling of the lamellar precursor with CTABr and subsequent exfoliation by sonication. Characterization techniques such as X-ray diffraction, Chemical analysis by Energy Dispersive X-Ray Spectroscopy and Physical Nitrogen Adsorption were used. It was observed by the XRD analysis of the products of the syntheses carried out, that the presence of the CTABr surfactant promotes the disorganization of the lamellae. It is also concluded that there was an influence of acidification on the properties of the final products. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | BR_69f5200620caa9bdd6233ff4e07def92 |
| institution | UNIFEI |
| instname_str | Universidade Federal de Itajubá (UNIFEI) |
| language | por |
| network_acronym_str | BR |
| network_name_str | Brasil |
| oai_identifier_str | oai:ojs.pkp.sfu.ca:article/22539 |
| publishDate | 2021 |
| publishDateSort | 2021 |
| publisher | Research, Society and Development |
| publisherStr | Research, Society and Development |
| reponame_str | Research, Society and Development |
| spelling | Synthesis of the MCM-22 zeolite precursor and thermal, deslamination and acidification modifications Síntesis del precursor de zeolita MCM-22 y modificacións termal, deslamination y acidification Síntese do percursor (P)MCM-22 e modificações térmica, deslaminação e acidificação Lima, Wellington Siqueira Silva, Francisco Alex de Sousa Quintela, Paulo Henrique Leite Rodrigues, Meiry Gláucia Freire Síntesis Precursor (P)MCM-22 MCM-22 Calcinación Delaminación Acidification. Synthesis Calcination Deslaminação Acidificação. Síntese Calcinação In this work, the precursor (P)MCM-22 was prepared using the hydrothermal method in a static system and thermal modifications, delamination and acidification were carried out. This study aims to optimize the modification that promotes the disorganization of the zeolitic precursor lamellae and makes the active sites more accessible. The precursor (P)MCM-22 was prepared under hydrothermal conditions with a temperature of 150 oC and a crystallization time of 7 days. The delamination process was carried out via swelling of the lamellar precursor with CTABr and subsequent exfoliation by sonication. Characterization techniques such as X-ray diffraction, Chemical analysis by Energy Dispersive X-Ray Spectroscopy and Physical Nitrogen Adsorption were used. It was observed by the XRD analysis of the products of the syntheses carried out, that the presence of the CTABr surfactant promotes the disorganization of the lamellae. It is also concluded that there was an influence of acidification on the properties of the final products. En este trabajo se preparó el precursor (P) MCM-22 mediante el método hidrotermal en un sistema estático y se realizaron modificaciones térmicas, deslaminación y acidificación. Este estudio tiene como objetivo optimizar la modificación que promueve la desorganización de las laminillas precursoras zeolíticas y hace más accesibles los sitios activos. El precursor (P) MCM-22 se preparó en condiciones hidrotermales con una temperatura de 150 ° C y un tiempo de cristalización de 7 días. El proceso de deslaminación se llevó a cabo mediante hinchamiento del precursor laminar con CTABr y posterior exfoliación por sonicación. Se utilizaron técnicas de caracterización como la difractometría de rayos X, el análisis químico por espectroscopia de rayos X de dispersión de energía y la adsorción física de nitrógeno. Los resultados de XRD revelaron que se formaron el precursor (P) MCM-22 y la zeolita MCM-22. Se observó mediante el análisis XRD de los productos de las síntesis realizadas, que la presencia del tensioactivo CTABr favorece la desorganización de las laminillas. También se concluye que hubo influencia de la acidificación en las propiedades de los productos finales. Neste trabalho foi preparado o precursor (P)MCM-22 a partir do método hidrotérmico em sistema estático e realizadas modificações térmica, deslaminação e acidificação. Esse estudo tem a finalidade otimizar a modificação que promove a desorganização das lamelas do precursor zeolítico e torna os sítios ativos mais acessíveis. O precursor (P)MCM-22 foi preparado sob condições hidrotérmica com temperatura de 150 oC e tempo de cristalização de 7 dias. O processo de deslaminação foi realizado via intumescimento do precursor lamelar com CTABr e posterior esfoliação por sonicação. Foram utilizadas técnicas de caracterização tais como, difratometria de raios X, Análise química por Espectroscopia de Raios X por Energia Dispersiva e Adsorção Física de Nitrogênio. Os resultados de DRX revelaram que o precursor (P)MCM-22 e a zeólita MCM-22 foram formados. Foi observado pelas análises de DRX dos produtos das sínteses realizadas, que a presença do surfactante CTABr promove a desorganização das lamelas. Conclui-se também que houve influência da acidificação nas propriedades dos produtos finais. Research, Society and Development https://rsdjournal.org/index.php/rsd/article/view/22539 10.33448/rsd-v10i14.22539 |
| spellingShingle | Synthesis of the MCM-22 zeolite precursor and thermal, deslamination and acidification modifications Lima, Wellington Siqueira Síntesis Precursor (P)MCM-22 MCM-22 Calcinación Delaminación Acidification. Synthesis Calcination Deslaminação Acidificação. Síntese Calcinação |
| status_str | publishedVersion |
| title | Synthesis of the MCM-22 zeolite precursor and thermal, deslamination and acidification modifications |
| title_full | Synthesis of the MCM-22 zeolite precursor and thermal, deslamination and acidification modifications |
| title_fullStr | Synthesis of the MCM-22 zeolite precursor and thermal, deslamination and acidification modifications |
| title_full_unstemmed | Synthesis of the MCM-22 zeolite precursor and thermal, deslamination and acidification modifications |
| title_short | Synthesis of the MCM-22 zeolite precursor and thermal, deslamination and acidification modifications |
| title_sort | Synthesis of the MCM-22 zeolite precursor and thermal, deslamination and acidification modifications |
| topic | Síntesis Precursor (P)MCM-22 MCM-22 Calcinación Delaminación Acidification. Synthesis Calcination Deslaminação Acidificação. Síntese Calcinação |
| topic_facet | Síntesis Precursor (P)MCM-22 MCM-22 Calcinación Delaminación Acidification. Synthesis Calcination Deslaminação Acidificação. Síntese Calcinação |
| url | https://rsdjournal.org/index.php/rsd/article/view/22539 |