Colloidal nanocrystals of zeolite β stabilized in alumina matrix

被引：56

作者：

Landau, MV ^{[1
]}

Tavor, D

Regev, O

Kaliya, ML

Herskowitz, M

Valtchev, V

Mintova, S

机构：

[1] Blechner Ctr Ind Catalysis & Proc Dev, Beer Sheva, Israel

[2] Ben Gurion Univ Negev, Dept Chem Engn, IL-84105 Beer Sheva, Israel

[3] Bulgarian Acad Sci, Cent Lab Mineral & Crystallog, Sofia, Bulgaria

来源：

CHEMISTRY OF MATERIALS | 1999年 / 11卷 / 08期

关键词：

D O I：

10.1021/cm980765u

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Characteristics of zeolite beta in stable aqueous colloidal solution were measured by cryo- TEM, DLS, SAXS and after separation from solution by SEM, HR-TEM. Twenty-nanometer spherical zeolite crystals were measured in equilibrium with flocculates. Mixing of colloidal zeolite solution with aluminogel yielded coagulation of both materials. The mass of zeolite: adsorbed by aluminogel increased with decreasing pH. After calcination, pellets of the composite material at zeolite loading below 60 wt % contained separated nanocrystals of 10-15-nm zeolite beta stabilized in the mesopores of alumina matrix. The imbedded zeolite had high structure order and acidity. No blocking of the zeolite micropores in composite materials was detected. The activity of zeolite beta nanocrystals (imbedded in alumina matrix) in cumene cracking twice that of bulk nanozeolite clusters.

引用

页码：2030 / 2037

页数：8

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