Influence of Localization of Acid Sites on Deactivation of Zeolite MFI in Oligomerization Process of Light Alkenes
- Авторы: Popov A.G.1, Efimov A.V.1, Ivanova I.I.1,2
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Учреждения:
- Faculty of Chemistry, Moscow State University
- Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences
- Выпуск: Том 59, № 7 (2019)
- Страницы: 691-694
- Раздел: Article
- URL: https://journal-vniispk.ru/0965-5441/article/view/180936
- DOI: https://doi.org/10.1134/S0965544119070168
- ID: 180936
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Аннотация
A series of samples of zeolite MFI with the same morphology, but different concentrations of Brønsted acid sites, have been obtained by means of ion exchange. Methods of temperature-programmed desorption of ammonia (TPD NH3) and IR spectroscopy of absorbed 2,6-di-tert-butylpyridine have demonstrated that the samples differ in the ratio of acid sites in the bulk of zeolite and on the external surface. Stability of the samples against deactivation has been determined in the oligomerization reaction of butylenes using the accelerated deactivation test under severe conditions. It has been shown that the main contribution to deactivation is made by acid sites located on the external surface of zeolite crystals.
Об авторах
A. Popov
Faculty of Chemistry, Moscow State University
Автор, ответственный за переписку.
Email: andreygpopov@yahoo.com
Россия, Moscow, 119991
A. Efimov
Faculty of Chemistry, Moscow State University
Email: andreygpopov@yahoo.com
Россия, Moscow, 119991
I. Ivanova
Faculty of Chemistry, Moscow State University; Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences
Email: andreygpopov@yahoo.com
Россия, Moscow, 119991; Moscow, 119991
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