INTERACTION OF WATER WITH THE ZEOLITE HY, STUDIED BY FT IR

被引：52

作者：

PARKER, LM ^{[1
]}

BIBBY, DM ^{[1
]}

BURNS, GR ^{[1
]}

机构：

[1] VICTORIA UNIV WELLINGTON,WELLINGTON,NEW ZEALAND

来源：

ZEOLITES | 1991年 / 11卷 / 03期

关键词：

FT IR; ZEOLITE HY; BRONSTED SITES; WATER; HYDROXYL GROUPS;

D O I：

10.1016/S0144-2449(05)80235-0

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：

The interaction of water with the Bronsted acid sites of zeolite HY at 25 and 80-degrees-C, and subsequent decomposition of HY upon thermal desorption of the water, has been studied by FT i.r. if less than one molecule of water was sorbed per Al atom in the zeolite, the acid sites were fully restored after water desorption. When the amount of sorbed water was increased, permanent loss of Bronsted acidity occurred on water desorption, along with collapse of the zeolite framework. Upon water sorption, the formation of new i.r. hydroxyl peaks was observed at 3710, 3675, and 3615 cm-1. These may be due to partial removal of Al from the lattice to form AlOH species, accompanied by the formation of internal silanol groups.

引用

页码：293 / 297

页数：5

共 13 条

[1]

Breck D. W, 1974, ZEOLITE MOL SIEVES

[2] NATURE OF LEWIS ACIDITY IN H-ZEOLITES [J].