文章基本信息

标题：Síntese do percursor (P)MCM-22 e modificaes térmica, deslaminao e acidificao
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作者：Wellington Siqueira Lima ; Francisco Alex de Sousa Silva ; Paulo Henrique Leite Quintela 等
期刊名称：Research, Society and Development
电子版ISSN：2525-3409
出版年度：2021
卷号：10
期号：14
页码：1-14
DOI：10.33448/rsd-v10i14.22539
语种：English
出版社：Grupo de Pesquisa Metodologias em Ensino e Aprendizagem em Ciências
摘要：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.
关键词：Synthesis;Precursor (P)MCM-22;MCM-22;Calcination;Deslaminação;Acidificação.