Synthesis, characterization, and catalytic properties of MWW zeolite with variable Si/Al ratios

被引：33

作者：

Liu, Lin ^{[1
]}

Cheng, Mojie ^{[1
]}

Ma, Ding ^{[1
]}

Hu, Gang ^{[1
]}

Pan, Xiulian ^{[1
]}

Bao, Xinhe ^{[1
]}

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2006年 / 94卷 / 1-3期

基金：

中国国家自然科学基金;

关键词：

MWW zeolite; Si/Al ratio; structural conversion; aluminum incorporation; Bronsted acidity; toluene disproportionation; MCM-22; ZEOLITE; MOLECULAR-SIEVE; CRYSTALLIZATION; KENYAITE; CRYSTALS; H-MCM-22; ALUMINUM; ACIDITY; ANALOG;

D O I：

10.1016/j.micromeso.2006.04.003

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Synthesis of aluminosilicate MWW zeolite with variable Si/Al ratios from deboronated ERB-1 zeolite through a process of structural conversion has been studied and the obtained material has been characterized in detail. Incorporation of aluminum species into the framework of deboronated ERB-1 zeolite and the acidity of calcined MWW zeolite have been confirmed by a number of physicochemical techniques. Aluminum species in the lamellar MWW zeolite precursor are not thermally stable, and partial dealumination takes place during the calcination process. MWW zeolite shows strong Bronsted acidity, and the amount of Bronsted acid sites is closely related with the amount of framework aluminum in MWW zeolite. Disproportionation of toluene was carried out over MWW zeolite with different Si/Al ratios, and the catalytic performance has been correlated with the Bronsted acidity of MWW zeolite. (c) 2006 Elsevier Inc. All rights reserved.

引用

页码：304 / 312

页数：9

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