Abstract
The SO2-enhanced isomerization of cis-but-2-ene over La-X zeolite has been characterised. The effect of pretreatment temperature of the zeolite on its activity for the double-bond shift of the olefin has suggested that the SO2 adsorbed on the dehydroxylated sites of the zeolite enhance the carboniogenic activity of the zeolite. Infrared spectroscopic studies have shown that no new acidic hydroxyl groups are formed by the adsorption of SO2. The enhanced production of pyridinium ions on the zeolite after the addition of SO2 suggests that the enhanced activity of the zeolite can be ascribed to an increase in activity of the acidic hydroxyl groups caused by the electron-withdrawing effect of SO2.
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Schedule a callMore From: Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
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