Coadsorption of methanol and isobutene on HY zeolite

Journal Article · Thu May 25 04:00:00 EDT 1995 · Journal of Physical Chemistry

DOI:https://doi.org/10.1021/j100021a051· OSTI ID:62457

Kogelbauer, A; Goodwin, Jr, J G ^[1]; Lercher, J A ^[2]

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1. Univ. of Pittsburgh, PA (United States)
2. Univ. of Twente, Enschede (Netherlands)

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{degree}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{degree}C. When methanol was adsorbed first and isobutene was subsequently coadsorbed, MTBE was formed even at 35{degree}C on the catalyst surface. MTBE desorbed easily at a temperature of 70{degree}C, restoring a major fraction of the Bronsted acid sites. Methanol was concluded to decrease the probability of oligomerization by effectively competing for the acid sites. 34 refs., 6 figs.

• Sponsoring Organization: USDOE
• OSTI ID: 62457
• Journal Information: Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 21 Vol. 99; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
ADSORPTION
BUTENES
METHANOL
METHYL ETHER
SYNTHESIS
ZEOLITES