Zeolite UFI and BEA in Alkylation and Trans-Alkylation Reactions

2011 Spring Symposium

 
Deng-Yang Jan
UOP-LLC-A Honeywell Company.
© 2011 UOP LLC, All Rights Reserved


Abstract – UZM-5 (UFI framework type) has 2-dimensional, channel system connecting alpha cages through 8-MR pores with no connectivity along the [001] axis. The active sites within the microporous structure are not readily accessible to aromatic molecules. However, UZM- 5 (UFI) based catalysts is shown to be effective in the alkylation of benzene with light olefin under the liquid phase test condition. The good catalytic performance suggests that there are abundant active sites external to the microporous structure of UZM-5 and is consistent with structural characterization using DIFFax and HR-TEM. In contrast the disproportionation and trans alkylation reaction of alkylbenzene over zeolite beta (BEA) is carried out by acid sites in zeolite micropores and is sensitive to acidity irrespective of the varying morphologies achieved by various synthesis approaches. As shown by the EB disproportionation reaction in vapor phase and acidity measurement by FTIR, the maximal activity coincides with maximal acidity. Furthermore, the activity of the catalyst in liquid phase trans-alkylation of di-isopropylbenzene with benzene is shown to require both framework and non-framework aluminum to achieve maximal reactivity.

Speaker’s Biography – Deng-Yang Jan has been working in catalyst and product development at UOPHoneywell since 1986. He received his Ph. D. in Inorganic Chemistry from The Ohio State University in 1985.