Formation of microporous material AlPO4-18 under dry-gel conversion conditions

被引：31

作者：

Chen, Banghao ^{[1
]}

Huang, Yining ^{[1
]}

机构：

[1] Univ Western Ontario, Dept Chem, London, ON N6A 5B7, Canada

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2011年 / 143卷 / 01期

基金：

加拿大创新基金会;

关键词：

Molecular sieves; AlPO4-18; Dry gel conversion; Steam-assisted conversion; Crystallization; SOLID-STATE NMR; LAYERED ALUMINOPHOSPHATE; CHEMICAL-SHIFT; P-31; NMR; ZEOLITES; PHOSPHATES; PRECURSORS; FRAMEWORKS; RESONANCE; CATALYSTS;

D O I：

10.1016/j.micromeso.2011.02.002

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The formation of microporous molecular sieve AlPO4-18 under the dry gel conversion (DGC) conditions was examined. The evolution of the dry gel was monitored by powder XRD, SEM and, in particular, solid-state NMR techniques. The results show that the aluminophosphate (AlPO) amorphous dry gel is first converted to a layered AlPO phase. The layered intermediate has some resemblances to AlPO4-18 and is held together by very weak non-bonding interactions. Continuous heating results in the transformation of this layered phase into AlPO4-18 via reorganizations and condensations of P and Al sites. Three non-equivalent P sites of AlPO4-18 develop at different rates during the evolution. (C) 2011 Elsevier Inc. All rights reserved.

引用

页码：14 / 21

页数：8

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