THE EFFECT OF PARTIAL DEHYDROXYLATION AND PYRIDINE SORPTION ON THE STRENGTH OF OH GROUPS IN NAHZSM-5 ZEOLITE

被引：19

作者：

DATKA, J

BOCZAR, M

机构：

[1] Faculty of Chemistry, Jagiellonian University, Cracow, Karasia

来源：

ZEOLITES | 1991年 / 11卷 / 04期

关键词：

IR SPECTROSCOPY; ZSM-5; ZEOLITES; ACIDITY;

D O I：

10.1016/0144-2449(91)80309-N

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 acidic 3609 cm-1 hydroxyls in NaHZSM-5 zeolite are heterogeneous: Few kinds of OH groups of various acid strength exist. The effect of removal of some hydroxyls by dehydroxylation and of pyridine sorption on the acid strength of OH groups remaining in the zeolite and contributing to the 3609 cm-1 band was studied. The i.r. experiments of benzene sorption have shown that the removal of some hydroxyls does not change the acid strength of the remaining hydroxyls. This is explained by large distances between hydroxyls and weak interaction between them. Both dehydroxylation and pyridine remove the most acidic hydroxyls first.

引用

页码：397 / 400

页数：4

共 16 条

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