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.