On the chemical condensation of the layers of zeolite precursor MCM-22(P)

被引：6

作者：

Fabbiani, Marco ^{[1
]}

Morsli, Amine ^{[2
]}

Confalonieri, Giorgia ^{[3
]}

Cacciaguerra, Thomas ^{[1
]}

Fajula, Francois ^{[1
]}

Haines, Julien ^{[1
]}

Bengueddach, Abdelkader ^{[4
]}

Arletti, Rossella ^{[5
]}

Di Renzo, Francesco ^{[1
]}

机构：

[1] Univ Montpellier, Ctr Balard, ICGM, CNRS,ENSCM, 1919 Route Mendea, F-34090 Montpellier, France

[2] Univ Sci & Technol Oran M Boudiaf, Lab Engn Environm Proc, LIPE, BP 1505, Oran El Mnouer, Algeria

[3] ESRF, 71 Av Martyrs, F-38000 Grenoble, France

[4] Univ Oran, Fac Appl & Exact Sci, Lab Chem Mat, BP 1524, Oran, Algeria

[5] Univ Modena & Reggio Emilia, Dept Chem & Geol Sci, Via Giuseppe Campi 103, I-41125 Modena, Italy

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2022年 / 332卷

关键词：

Zeolite; Layered material; Acid condensation; Template extraction; Dealumination; SI-29 MAS NMR; TOPOTACTIC CONDENSATION; 2-DIMENSIONAL ZEOLITES; MOLECULAR-SIEVE; SILICATE; MWW; DEALUMINATION; CONVERSION; MECHANISM; CATALYSIS;

D O I：

10.1016/j.micromeso.2021.111678

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Chemical condensation of layers of silicates has been often proposed as an alternative to thermal condensation, finding limited success. The formation of the industrially relevant MCM-22 zeolite (MWW IZA code) from a mild hydrothermal precursor is the most important example of 2D-3D aluminosilicate condensation. Silanols of opposed layers have been condensed by acid-driven dehydration in concentrated nitric acid, as confirmed by powder XRD and Si-29 NMR spectroscopy, implying interlayer template extraction and corresponding dealumination. Milder acid treatments favour template extraction and shrinkage of interlayer distance, but do not provide significant silanol condensation. Template extraction is further favoured by degradation of the organics in the presence of a Cu2+ homogeneous catalyst.

引用

页数：8

共 76 条

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