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标题：Effect of use of methyltriethylamonium chloride individually and combined with n-butylamine on the characteristics of the ZSM-12 zeolite crystallization process
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作者：Elisa Gabriela Costa Gouveia ; Soraya Lira Alencar ; Bruno José Barros da Silva 等
期刊名称：Research, Society and Development
电子版ISSN：2525-3409
出版年度：2022
卷号：11
期号：1
页码：1-10
DOI：10.33448/rsd-v11i1.25402
语种：English
出版社：Grupo de Pesquisa Metodologias em Ensino e Aprendizagem em Ciências
摘要：The improvement of the structure of the ZSM-12 zeolite has been extensively studied, due to its shape selectivity properties, acidity and hydrothermal stability, with this zeolite being used in a wide range of applications, such as adsorbent, ion exchanger and in important reactions in the petrochemical area. In this work, the effect on the crystallization characteristics and physicochemical properties of the ZSM-12 zeolite using methyltriethylammonium chloride, individually, and combined with n-butylamine, as structure-directing agent was studied. The syntheses were carried out at 160 and 170 °C between 48 and 144 h in static medium. The samples obtained were characterized by the techniques of X-ray diffraction, thermal analysis, nitrogen adsorption-desorption and temperature-programmed ammonia desorption. The simultaneous use of methyltriethylammonium chloride and n-butylamine, at a ratio of 0.2, promoted the obtainment of highly crystalline ZSM-12, with an increase in the microporous area and acidity, denoting an improvement in the physicochemical properties of this zeolite.
关键词：ZSM-12 zeolite;Structure-directing agent;Methyltriethylammonium chloride;n-butylamine;Physicochemical properties.