Methodological Aspects of Producing Aluminosilicalites with Typological Structure of HZSM-5. Rational Design and Catalytic Properties
Научная публикация
| Журнал |
Journal of Porous Materials
ISSN: 1380-2224
, E-ISSN: 1573-4854
|
| Вых. Данные |
Год: 2025,
Том: 32,
Страницы: 2245–2261
Страниц
: 17
DOI:
10.1007/s10934-025-01840-8
|
| Ключевые слова |
HZSM-5 · Composition and structure · Transmission electron microscopy · Nitrous oxide catalytic decomposition |
| Авторы |
Domoroshchina Elena
1
,
Kuz’micheva Galina
1
,
Vasiliev Alexander
2,3
,
Pavlov Ivan
1
,
Pirutko Larisa
4
,
Tkachenko Olga
5
,
Kustov Alexander
2,5,6
|
| Организации |
| 1 |
MIREA - Russian Technological University (RTU MIREA), Moscow 119454, Russia
|
| 2 |
Lomonosov Moscow State University, Moscow 119991, Russia
|
| 3 |
National Research Center “Kurchatov Institute”, 1 Akademika Kurchatova Pl., Moscow 123182, Russia
|
| 4 |
Boreskov Institute of Catalysis, Siberian Branch, Novosibirsk 630090, Russia
|
| 5 |
Zelinsky Institute of Organic Chemistry, RAS, Moscow 119991, Russia
|
| 6 |
Institute of Ecotechnologies and Engineering, National University of Science and Technology MISiS, Moscow 119071, Russia
|
|
Информация о финансировании (1)
|
1
|
Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)
|
FWUR-2024-0035
|
In this work, the analysis and generalization of data on the elemental, phase and surface composition, crystal structure and microstructure of MFI-type HZSM-5 with Si/Al = 12, 25, 40, 300 were presented. Relationships between the composition of zeolite in HZSM-5 samples with different Si/Al and pore volume, specific surface, and framework voids area were established. Data obtained by electron microscopy and energy dispersive X-ray microanalysis explained the discrepancy between HZSM-5 real composition and the initial (as synthesized) one. Samples with the maximum content of Brønsted (HZSM-5 with Si/Al = 25) and Lewis (HZSM-5 with Si/Al = 12) acid sites responsible for the catalytic activity were identified using diffuse reflectance Fourier transform infrared spectroscopy. N2O decomposition reaction rate was found to decrease in the row HZSM-5(25) > HZSM-5(12) > HZSM-5(40) > HZSM-5(40)C > > HZSM-5(300). The high N2O decomposition rate demonstrated by HZSM-5(25) makes it promising catalyst. The second phase of iron oxides, found in all studied HZSM-5 as an impurity of the initial components, and the presence of faceted particles {001} oriented in HZSM-5(25) were shown to contribute to its maximum catalytic activity in N2O decomposition. The applied methodology for studying aluminosilicalites with different silicon to aluminum ratio and the revealed correlations can provide a fundamental perspective in studying other zeolites.