Effect of Rare Earths on Acidity of High-Silica Ultrastable REY Zeolites and Catalytic Performance of NiMo/REY+Al2O3 Catalysts in Vacuum Gas Oil Hydrocracking Научная публикация
| Журнал |
Microporous and Mesoporous Materials
ISSN: 1387-1811 , E-ISSN: 1873-3093 |
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| Вых. Данные | Год: 2022, Том: 329, Номер статьи : 111547, Страниц : 12 DOI: 10.1016/j.micromeso.2021.111547 | ||||
| Ключевые слова | Ultrastable Y zeolite, Rare earths, Acidity, Hydrocracking, Vacuum Gas Oil | ||||
| Авторы |
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| Организации |
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Информация о финансировании (1)
| 1 | Министерство науки и высшего образования Российской Федерации (с 15 мая 2018) | 0239-2021-0006 |
Реферат:
A series of low-sodium ultrastable Y zeolites (SiO2/Al2O3 ~ 25) partially exchanged with different amounts of rare earth ions (RE2O3 = 0.55-3.32 wt%) was prepared and characterized by XRD, IR spectroscopy, elemental analysis, N2 adsorption, as well as 29Si and 27Al NMR. The effect of RE content on the number and relative strength of acid sites of REY zeolites was studied by IR spectroscopy of absorbed CO and pyridine. The increase in the RE content in the zeolites leads to a decrease in the concentration of strong Brønsted acid sites (BAS) in faujasite cages (bridged Si–O(H)–Al groups), especially the concentration of stronger BAS associated with Si-O(H)-Al groups polarized by extra-framework aluminum species. At the same time, the concentration of less acidic OH groups connected with extra-framework ions increases possibly due to the formation of additional RE-O(H)-Al groups. The total number of BAS in all the samples remains close. An increase in the RE2O3 content from 0.55 to 3.32 wt% decreases almost by half the ratio of strong BAS in faujasite cages to less acidic extra-framework BAS. The catalytic performance of NiMo/(30 wt% REY + 70 wt% Al2O3) catalysts was evaluated in hydrocracking of vacuum gas oil. The enhanced hydrocracking activity and selectivity to middle distillates are mainly achieved due to the optimal acidity of the zeolites.
Библиографическая ссылка:
Danilova I.G.
, Dik P.P.
, Sorokina T.P.
, Gabrienko A.A.
, Kazakov M.O.
, Paukshtis E.A.
, Doronin V.P.
, Klimov O.V.
, Noskov A.S.
Effect of Rare Earths on Acidity of High-Silica Ultrastable REY Zeolites and Catalytic Performance of NiMo/REY+Al2O3 Catalysts in Vacuum Gas Oil Hydrocracking
Microporous and Mesoporous Materials. 2022. V.329. 111547 :1-12. DOI: 10.1016/j.micromeso.2021.111547 WOS Scopus РИНЦ CAPlusCA OpenAlex
Effect of Rare Earths on Acidity of High-Silica Ultrastable REY Zeolites and Catalytic Performance of NiMo/REY+Al2O3 Catalysts in Vacuum Gas Oil Hydrocracking
Microporous and Mesoporous Materials. 2022. V.329. 111547 :1-12. DOI: 10.1016/j.micromeso.2021.111547 WOS Scopus РИНЦ CAPlusCA OpenAlex
Даты:
| Поступила в редакцию: | 18 авг. 2021 г. |
| Принята к публикации: | 2 нояб. 2021 г. |
| Опубликована online: | 6 нояб. 2021 г. |
| Опубликована в печати: | 1 янв. 2022 г. |
Идентификаторы БД:
| Web of science: | WOS:000722311200002 |
| Scopus: | 2-s2.0-85119086237 |
| РИНЦ: | 47525262 |
| Chemical Abstracts: | 2021:2521237 |
| Chemical Abstracts (print): | 178:292296 |
| OpenAlex: | W3214570149 |