Collect. Czech. Chem. Commun. 1998, 63, 42-52

Skeletal Isomerization of n-Butane Over Mordeniteand Beta Zeolites

Evžen Babůrek and Jana Nováková

J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic,182 23 Prague 8, Czech Republic


It was found that the addition of platinum (3 wt.%) substantially increases the total n-butane conversion and selectivity to isobutane over H-Beta zeolite. The same holds for H-Mordenite; however, the conversion significantly decreases in time at 350 °C due to the coking of the catalyst. The selectivity to isobutane is the highest at 300 °C over both zeolite types with platinum (over Pt/H-Beta 1.8 times higher than over Pt/H-Mordenite at almost the same conversion levels of 30 and 36%, respectively). The H-forms of both zeolite types are most selective at 250 °C, but the total conversion is low. The results obtained are related to the structural features of both zeolite types.

Keywords: n-Butane isomerization; H-Mordenite; Pt/H-Mordenite; H-Beta; Pt/H-Beta.