Study on the microporous structure parameters of BEA type zeolites
E.V. Maraeva1, S. Tokmeilova1, D.R. Sagitova1, I.E. Kononova1, V.A. Moshnikov1, S.A. Skornikova2
1 Saint Petersburg Electrotechnical University «LETI»
2 Irkutsk National Research Technical University
Abstract: The paper considers a series of zeolite materials used as catalysts. Since the formation of mesoporosity in a microporous matrix is one of the methods for increasing the efficiency of zeolite materials in catalysis, it is necessary to control their porous structure parameters. The effect of post-synthetic treatment with acid and alkali solutions on the specific surface area of zeolites of the BEA type has been studied. The method of low-temperature (at 77 K) adsorption of nitrogen vapors was used to determine the external specific surface area (excluding micropores) and the volume of micropores in the samples on a Sorbi device. It has been shown that modification of BEA-type zeolite with concentrated mineral acids leads to both a decrease in the volume of micropores and a decrease in the specific surface area. At the same time, it was established by the X-ray phase analysis that the treatment with concentrated acids does not lead to destruction of the crystal structure of zeolites. In the case of treatment with alkali solutions, the specific surface area of the samples increases and the volume of micropores sharply decreases.
Keywords: zeolites, BEA type, hierarchy, mesopores, micropores, adsorption, specific surface area
- Evgeniya V. Maraeva – Ph. D., Docent, Micro- and Nanoelectronics Department, Saint Petersburg Electrotechnical University «LETI»
- Saida . Tokmeilova – 1st year postgraduate student, Micro- and Nanoelectronics Department, Saint Petersburg Electrotechnical University «LETI»
- Diana R. Sagitova – 4th year student, Micro- and Nanoelectronics Department, Saint Petersburg Electrotechnical University «LETI»
- Irina E. Kononova – Ph. D., Docent, Micro- and Nanoelectronics Department, Saint Petersburg Electrotechnical University «LETI»
- Vyacheslav A. Moshnikov – Dr. Sc., Professor, Micro- and Nanoelectronics Department, Saint Petersburg Electrotechnical University «LETI»
- Svetlana A. Skornikova – Ph. D., Docent, Department of Radioelectronics and Telecommunication Systems, Irkutsk National Research Technical University
Maraeva, E.V. Study on the microporous structure parameters of BEA type zeolites / E.V. Maraeva, S.. Tokmeilova, D.R. Sagitova, I.E. Kononova, V.A. Moshnikov, S.A. Skornikova // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. — 2022. — I. 14. — P. 203-210. DOI: 10.26456/pcascnn/2022.14.203. (In Russian).
Full article (in Russian): download PDF file
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