Impact of Composition and Structural Parameters on the Catalytic Activity of MFI Type Titanosilicalites Научная публикация
| Журнал |
Dalton Transactions
ISSN: 1477-9226 , E-ISSN: 1477-9234 |
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| Вых. Данные | Год: 2022, Том: 51, Номер: 9, Страницы: 3439-3451 Страниц : 13 DOI: 10.1039/d1dt04131b | ||||||||||||||
| Ключевые слова | C (programming language); Catalyst activity; Chlorine compounds; Fourier transform infrared spectroscopy; Ions; Nitrogen oxides; Nuclear magnetic resonance spectroscopy; Propane; Selective catalytic reduction; Silicates; Temperature programmed desorption; Titanium; X ray absorption spectroscopy; X ray powder diffraction | ||||||||||||||
| Авторы |
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| Организации |
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Информация о финансировании (2)
| 1 | Министерство науки и высшего образования Российской Федерации (с 15 мая 2018) | 0706-2020-0026 |
| 2 | Министерство науки и высшего образования Российской Федерации (с 15 мая 2018) | 0239-2021-0006 |
Реферат:
Titanosilicalite of the MFI type was obtained via a hydrothermal method. Its initial and annealed at 75 °C (TS-1P(75)) and 500 °C (TS-1P(500)) forms were studied by X-ray powder diffraction (PXRD), X-ray absorption spectroscopy (XAS-method), Fourier-transform infrared (FT-IR) spectroscopy, differential scanning calorimetry (DSC), temperature-programmed ammonia desorption (TPD NH3), and pyridine adsorption (Py). The full-profile Rietveld method allowed us to observe the presence of the organic template tetrapropylammonium hydroxide (TPAOH) in the framework voids, as well as to determine the silicate module (Si/Ti = 73.5) and the distribution of Ti4+ ions over the MFI-type structure sites (Ti atoms replace Si ones in two positions: T1 and T6). The coordination numbers of titanium (CNTi = 4.6 for TS-1P and TS-1P(75), CNTi = 3.8 for TS-1P(500)) were established by the XAS-method. The catalytic activity of titanosilicalites was found in the reactions of nitrous oxide decomposition (the maximal decomposition rate is demonstrated for the TS-1P(75) sample), allyl chloride epoxidation to epichlorohydrin (the best combination of all indicators was exhibited for the TS-1P sample) and propane conversion (maximum propane conversion, and butadiene and propylene selectivity were observed in both TS-1P(75) and TS-1P(500) samples). Mechanisms for the catalytic processes are proposed. The relationship between the catalytic properties and the composition (Si/Ti), Ti4+ ion distribution over the MFI-type structure sites, the local environment of titanium ions, and the number of acid sites in the titanosilicalites are discussed.
Библиографическая ссылка:
Kuz'micheva G.
, Chernyshev V.
, Kravchenko G.
, Pirutko L.
, Khramov E.
, Bruk L.
, Pastukhova Z.
, Kustov A.
, Kustov L.
, Markova E.
Impact of Composition and Structural Parameters on the Catalytic Activity of MFI Type Titanosilicalites
Dalton Transactions. 2022. V.51. N9. P.3439-3451. DOI: 10.1039/d1dt04131b WOS Scopus РИНЦ CAPlusCA PMID OpenAlex
Impact of Composition and Structural Parameters on the Catalytic Activity of MFI Type Titanosilicalites
Dalton Transactions. 2022. V.51. N9. P.3439-3451. DOI: 10.1039/d1dt04131b WOS Scopus РИНЦ CAPlusCA PMID OpenAlex
Даты:
| Поступила в редакцию: | 8 дек. 2021 г. |
| Принята к публикации: | 28 янв. 2022 г. |
| Опубликована online: | 31 янв. 2022 г. |
| Опубликована в печати: | 7 мар. 2022 г. |
Идентификаторы БД:
| Web of science: | WOS:000755248300001 |
| Scopus: | 2-s2.0-85125554652 |
| РИНЦ: | 48187070 |
| Chemical Abstracts: | 2022:373396 |
| Chemical Abstracts (print): | 179:17606 |
| PMID (PubMed): | 35167633 |
| OpenAlex: | W4210621010 |