Physical-Chemical and Catalytic Properties of MEL and MFI Zeolites Obtained by Steam-Assisted Crystallization: Fid-Bau Portal

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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.

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.

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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.

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.

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.

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.

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Titel:

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

Weitere Titelangaben:

Pet. Chem.

Beteiligte:

Vorobkalo, V. A. (Autor:in) / Popov, A. G. (Autor:in) / Efimov, A. V. (Autor:in) / Bachurina, D. O. (Autor:in) / Nikiforov, A. I. (Autor:in) / Ivanova, I. I. (Autor:in)

Erschienen in:

Petroleum Chemistry ; 64 ; 1070-1078

Erscheinungsdatum:

01.09.2024

Format / Umfang:

9 pages

ISSN:

1555-6239 , 0965-5441

DOI:

https://doi.org/10.1134/S0965544124070077

Medientyp:

Aufsatz (Zeitschrift)

Format:

Elektronische Ressource

Sprache:

Englisch

Schlagwörter:

MEL zeolite , MFI zeolite , steam-assisted crystallization , oligomerization of butylenes , deactivation Chemical Sciences , Physical Chemistry (incl. Structural) , Chemistry , Industrial Chemistry/Chemical Engineering , Chemistry and Materials Science

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