DOI: 10.1039/A607290I
(Paper)
J. Chem. Soc., Faraday Trans., 1997, 93, 1221-1224
Kinetic studies of the dehydration of methanol over aluminosilicate and gallosilicate offretites
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María D. Alba, Antonio A. Romero, Mario L. Occelli and Jacek Klinowski
Abstract
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 13C magic-angle-spinning (MAS) NMR spectroscopy. No reaction takes place at room temperature. At 150 °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.