Ordered End-Member of ZSM-48 Zeolite Family

被引：45

作者：

Kirschhock, C. E. A. ^{[1
]}

Liang, D. ^{[2
]}

Van Tendeloo, G. ^{[2
]}

Fecant, A. ^{[3
]}

Hastoye, G. ^{[1
]}

Vanbutsele, G. ^{[1
]}

Bats, N. ^{[3
]}

Guillon, E. ^{[3
]}

Martens, J. A. ^{[1
]}

机构：

[1] Katholieke Univ Leuven, Ctr Surface Chem & Catalysis, B-3001 Heverlee, Belgium

[2] Univ Antwerp, EMAT, B-2020 Antwerp, Belgium

[3] IFP Lyon, F-69360 Solaize, France

来源：

CHEMISTRY OF MATERIALS | 2009年 / 21卷 / 02期

关键词：

HYDROISOMERIZATION;

D O I：

10.1021/cm802614x

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：

ZSM-48 and related zeolites are considered to be highly disordered structures. Different polytypes can be clearly distinguished by simulation of high-resolution electron microscopy images. Synthesis of phase-pure polytypes was attempted. One of the investigated samples crystallized via seeding designated as COK-8 consisted of nanoscopic, needlelike crystals with a very large length/width ratio, growing along the pore direction. These specimens are phase-pure polytype 6 (PT6, numbering according to Lobo and van Koningsveld). Aggregates of these nanoneedles occasionally contained a second polytype: PT1. The latter polytype occurred more abundantly in larger crystal rods in an IZM-1 sample crystallized in ethylene glycol. Here too, the isolated crystallites mainly consist of large, defect-free regions of PT6. A simulation of polytype lattice energies offers a rational explanation for the observed polytypical intergrowth formation.

引用

页码：371 / 380

页数：10

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