Coadsorption of methanol and isobutene on HY zeolite

A. Kogelbauer, J. G. Goodwin, J. A. Lercher

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In order to develop a better understanding of methyl tert-butyl ether (MTBE) synthesis on zeolites, the coadsorption of methanol and isobutene on HY zeolite was investigated using IR spectroscopy. Initial adsorption of isobutene alone at 35°C led to rapid oligomerization yielding strongly bound oligomers. The subsequent coadsorption of methanol did not induce any changes in the zeolite-adsorbate complexes. TPD following the coadsorption showed that the Bronsted acid sites could be restored by temperature treatment above approximately 300°C. When methanol was adsorbed first and isobutene was subsequently coadsorbed, MTBE was formed even at 35°C on the catalyst surface. MTBE desorbed easily at a temperature of 70°C, restoring a major fraction of the Brosted acid sites. Methanol was concluded to decrease the probability of oligomerization by effectively competing for the acid sites.

Original languageEnglish
Pages (from-to)8777-8781
Number of pages5
JournalJournal of Physical Chemistry
Issue number21
StatePublished - 1995
Externally publishedYes


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