Kinetic studies of the dehydration of methanol over aluminosilicate and gallosilicate offretites

被引：10

作者：

Alba, MD

Romero, AA

Occelli, ML

Klinowski, J

机构：

[1] UNIV CAMBRIDGE,DEPT CHEM,CAMBRIDGE CB2 1EW,ENGLAND

[2] GEORGIA INST TECHNOL,GEORGIA TECH RES INST,ZEOLITE & CLAY PROGRAM,ATLANTA,GA 30332

来源：

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS | 1997年 / 93卷 / 06期

关键词：

D O I：

10.1039/a607290i

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 kinetics of the dehydration of CH3OH by the hydrogen forms of three offretites with different contents of framework Al and Ga have been monitored by C-13 magic-angle-spinning (MAS) NMR spectroscopy. No reaction takes place at room temperature. At 150 degrees C methanol is dehydrated to dimethyl ether. As expected, the catalytic activity of offretite for this reaction is lower than that of zeolite ZSM-5, and it decreases with increasing framework gallium content. The rates of the dehydration reaction are 0.045, 0.863 and 1.136 a.u.(-1) s(-1) for Ga-, Al,Ga- and Al-offretites, respectively.

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页码：1221 / 1224

页数：4

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