Acid Properties of Hierarchical Zeolites Y

被引：27
|
作者：
Gackowski, Mariusz [1 ]
Datka, Jerzy [1 ]
机构：
[1] Polish Acad Sci, Jerzy Haber Inst Catalysis & Surface Chem, Niezapominajek 8, PL-30239 Krakow, Poland
来源：
MOLECULES | 2020年 / 25卷 / 05期
关键词：
mesoporous zeolites; acidity; desilication; CATALYTIC CRACKING PERFORMANCE; OH GROUPS; INTRACRYSTALLINE MESOPOROSITY; ALKALINE TREATMENT; MOLECULAR-SIEVE; SOLID ACIDS; IR; ZSM-5; NMR; SITES;
D O I：
10.3390/molecules25051044
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
The article reviews different strategies towards obtaining mesoporous zeolites Y: desilication; surfactant templating and assembly of zeolite crystals. The impact of those methods on physicochemical properties is covered, with a special focus on the acidity of the samples measured with infrared (IR) spectroscopy. The methods of characterization of acidity are presented. Quaternary ammonium cations used for desilication lead to obtaining crystalline; mesoporous and highly acidic zeolites. Si-OH-Al groups of extremely high acidity can be produced by calcination in a humid atmosphere. When the conditions are optimized, post-synthetic surfactant templating allows crystalline mesoporous zeolite to be obtained with no loss of material. All mesoporous zeolites Y proved to be active catalysts in liquid phase isomerization, catalytic cracking, and other reactions.
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页数：24
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