A study of the localization and accessibility of Bronsted and Lewis acid sites of H-mordenite through the FT-IR spectroscopy of adsorbed branched nitriles

被引：56

作者：

Bevilacqua, M ^{[1
]}

Busca, G ^{[1
]}

机构：

[1] Univ Genoa, Dipartimento Ingn Chim & Proc, DiCheP, I-16129 Genoa, Italy

来源：

CATALYSIS COMMUNICATIONS | 2002年 / 3卷 / 11期

关键词：

D O I：

10.1016/S1566-7367(02)00196-6

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：

Adsorption of propionitrile (PrN), isobutironitrile (IBN) and pivalonitrile (PN) with H-MOR (Si/Al = 10) has been investigated. The accessibility of IBN and, more, of PN are limited, unlike PrN. Terminal silanols (3745 cm(-1)), weakly acidic, are located, as Lewis sites, at the external crystal surface. Bridging hydroxy groups absorbing at 3588 cm(-1) are inside the side pockets, those absorbing at 3605 cm(-1) are in the main channels and those absorbing at 3609 cm(-1) are at the intersection between side pockets and main channels. OH's due to extra framework materials (3650 cm(-1)) are in the side pockets. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：497 / 502

页数：6

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