Impact of composition and structural parameters on the catalytic activity of MFI type titanosilicalites

Кузьмичева, Г. М.; Чернышев, Владимир В.; Kravchenko, G. V.; Pirutko, Larisa V.; Khramov, Evgeny V.; Брук, Л. Г.; Pastukhova, Zhanna Yu.; Kustov, Alexander L.; Кustov, Leonid М.; Маркова, Е. Б.

doi:10.1039/d1dt04131b

Cited by 6 publications

(2 citation statements)

References 46 publications

(56 reference statements)

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“…HZSM-5(25) demonstrates a signi cantly higher rate of N 2 O decomposition reaction compared to previously studied samples of titanosilicalites [33] as well as Fe/Beta and Fe/SSZ-13 [52]. HZSM-5( 25) turned out to be the most preferred catalyst in the N 2 O decomposition reaction among aluminosilicalites under study.…”

Section: Discussionmentioning

confidence: 81%

“…Catalytic decomposition of nitrous oxide (N 2 O) was carried out in a ow-type quartz reactor with internal diameter of 4 mm (atmospheric pressure, temperature range of 400-700°C) according to the procedure described in [33]. Catalytic tests were performed in a 100% N 2 O ow with gas hourly space velocity of 30,000 ml/(h -1 ×g -1 ).…”

Section: Catalytic Experimentsmentioning

confidence: 99%

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Rational Design of Aluminium-containing Zeolites with Typological Structure of HZSM-5 and Catalytic Properties

Domoroshchina,

Kuz’micheva,

Vasiliev

et al. 2024

Preprint

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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 HZSM-5 silicate modulus (Si/Al) and pore volume, specific surface, the area of framework voids were established. Data obtained by electron microscopy and energy dispersive X-ray microanalysis explained the discrepancy between HZSM-5 real composition and the initial 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)С>>HZSM-5(300). The high N2O decomposition rate demonstrated by HZSM-5(25) makes it promising catalyst. The second phase of iron oxides 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 silicate modules and the revealed correlations can provide a fundamental perspective in studying other zeolites or modifying data.

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Section: Discussionmentioning

confidence: 81%

Section: Catalytic Experimentsmentioning

confidence: 99%