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

被引：0

作者：

Vorobkalo, V. A. ^{[1
]}

Popov, A. G. ^{[1
]}

Efimov, A. V. ^{[1
]}

Bachurina, D. O. ^{[1
,2
]}

Nikiforov, A. I. ^{[1
]}

Ivanova, I. I. ^{[1
,2
]}

机构：

[1] Lomonosov Moscow State Univ, Moscow 119991, Russia

[2] Russian Acad Sci, Topchiev Inst Petrochem Synth, Moscow 119991, Russia

来源：

PETROLEUM CHEMISTRY | 2024年 / 64卷 / 09期

基金：

俄罗斯科学基金会;

关键词：

MEL zeolite; MFI zeolite; steam-assisted crystallization; oligomerization of butylenes; deactivation; OLIGOMERIZATION; LIQUID; SELECTIVITY; PARTICLES; PROPENE;

D O I：

10.1134/S0965544124070077

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

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.

引用

页码：1070 / 1078

页数：9

共 30 条

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