Physical-Chemical and Catalytic Properties of MEL and MFI Zeolites Obtained by Steam-Assisted Crystallization

Vorobkalo, V.A.; Popov, A.G.; Efimov, A.V.; Bachurina, D.O.; Nikiforov, A.I.; Ivanova, I.I.

Авторы: Vorobkalo V.A., Popov A.G., Efimov A.V., Bachurina D.O., Nikiforov A.I., Ivanova Irina I.
Журнал: Petroleum Chemistry
Том: 64
Год издания: 2024
Издательство: Pleiades Publishing, Ltd
Местоположение издательства: Road Town, United Kingdom
Первая страница: 1070
Последняя страница: 1078
DOI: 10.1134/s0965544124070077
Аннотация: Two series of zeolites, vis., the MEL and MFI types, with different Si/Al molar ratios were synthesized by a steam-assisted crystallization method, specifically dry gel conversion (DGC). Their physicochemical properties were characterized by low-temperature nitrogen adsorption, scanning electron microscopy, and X-ray fluorescence analysis. The acidic properties were examined by IR spectroscopy of adsorbed pyridine and 2,6-di-tert-butylpyridine as well as by ammonia temperature-programmed desorption. The DGC-synthesized zeolites were distinguished by high crystallinity, small crystal size, and well-developed surface. All the samples exhibited high activity and deactivation resistance in the oligomerization of a butane–butylene fraction. A comparative assessment of the catalytic performance the MEL and MFI samples demonstrated that the structural difference between the MEL and MFI types barely affects their deactivation resistance. Therefore, MEL zeolite is a valid alternative to the MFI type in the development of oligomerization catalysts.
Добавил в систему: Никифоров Александр Игоревич

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