SOLID-STATE NMR-STUDY OF ULTRASTABLE ZEOLITE-Y MODIFIED WITH ORTHOPHOSPHORIC ACID

被引：11

作者：

KOLODZIEJSKI, W ^{[1
]}

FORNES, V ^{[1
]}

CORMA, A ^{[1
]}

机构：

[1] UNIV POLITECN VALENCIA,CSIC,INST TECNOL QUIM,CAMINO VERA S-N,E-46071 VALENCIA,SPAIN

来源：

SOLID STATE NUCLEAR MAGNETIC RESONANCE | 1993年 / 2卷 / 03期

关键词：

SOLID-STATE NMR; ZEOLITE-Y; ORTHOPHOSPHORIC ACID; IMPREGNATION; ULTRASTABILIZATION;

D O I：

10.1016/0926-2040(93)90030-Q

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：

Si-29, Al-27 and P-31 solid-state NMR under magic-angle spinning was used for the study of ultrastable zeolite Y modified with H3PO4. The material is a potential candidate for a new generation of oil-cracking catalysts. Bloch decay and cross-polarization spectra were compared. It was found that amorphous aluminium phosphate is formed during the P-impregnation and the following activation, and that it occupies the zeolite surface and internal voids. For a high P-content under steaming conditions, aluminium phosphate is converted into a crystalline form. No evidence has been found for incorporation of P atoms into the zeolite framework.

引用

页码：121 / 129

页数：9

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