DEALUMINATION OF HEXAGONAL (EMT) CUBIC (FAU) ZEOLITE INTERGROWTH MATERIALS - A SEM AND HRTEM STUDY

被引：22

作者：

OHSUNA, T

TERASAKI, O

WATANABE, D

ANDERSON, MW

CARR, SW

机构：

[1] UNILEVER RES,PORT SUNLIGHT LAB,QUARRY RD E,BEBINGTON L63 3JW,MERSEYSIDE,ENGLAND

[2] IWAKI MEISEI UNIV,COLL SCI & ENGN,IWAKI,FUKUSHIMA 970,JAPAN

[3] UNIV MANCHESTER,INST SCI & TECHNOL,DEPT CHEM,MANCHESTER M60 1QD,LANCS,ENGLAND

[4] TOHOKU UNIV,DEPT PHYS,SENDAI,MIYAGI 980,JAPAN

来源：

CHEMISTRY OF MATERIALS | 1994年 / 6卷 / 12期

关键词：

D O I：

10.1021/cm00048a001

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：

SEM and HRTEM have shown that dealumination with ammonium hexafluorosilicate of the EMT and FAU end members leads to defect-free materials which have an amorphous layer covering the crystals. In contrast, the dealumination of EMT/FAU intergrowths yields materials with crevices which penetrate deep into the crystals. It is postulated that these occur in a highly intergrown region of the crystals. This is the first observation of the detailed effects of dealumination.

引用

页码：2201 / 2204

页数：4

共 28 条

[1] INTERGROWTHS OF CUBIC AND HEXAGONAL POLYTYPES OF FAUJASITIC ZEOLITES [J].

ANDERSON, MW ;

PACHIS, KS ;

PREBIN, F ;

CARR, SW ;

TERASAKI, O ;

OHSUNA, T ;

ALFREDDSON, V .

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1991, (23) :1660-1664

[2] INVESTIGATIONS INTO THE NATURE OF THE HEXAGONAL POLYTYPE OF FAUJASITE [J].

ANNEN, MJ ;

YOUNG, D ;

ARHANCET, JP ;

DAVIS, ME ;

SCHRAMM, S .

ZEOLITES, 1991, 11 (02) :98-102

[3]

AUDIER M, 1981, J CHEM SOC CHEM CMMM

[4]

CHAWIN B, 1990, J CATAL, V126, P532

[5]

CIGANEK E, 1983, Patent No. 4415736

[6]

CIRIC J, 1976, Patent No. 3972983

[7]

Ciric J, 1977, US, Patent No. [4021331 A, 4021331]

[8]

CORMA A, 1989, STUD SURF SCI CATAL, V49, P49

[9] FRAMEWORK AND EXTRA-FRAMEWORK ALUMINUM DISTRIBUTION IN (NH4)2F6SI-DEALUMINATED Y-ZEOLITES - RELEVANCE TO CRACKING CATALYSTS [J].

CRUZ, JM ;

CORMA, A ;

FORNES, V .

APPLIED CATALYSIS, 1989, 50 (03) :287-293

[10] SYNTHESIS OF NEW SILICA-RICH CUBIC AND HEXAGONAL FAUJASITES USING CROWN-ETHER-BASED SUPRAMOLECULES AS TEMPLATES [J].

DELPRATO, F ;

DELMOTTE, L ;

GUTH, JL ;

HUVE, L .

ZEOLITES, 1990, 10 (06) :546-552

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