Abstract: EU-1 zeolites were successfully synthesized with three different alkali sources[tetramethylammonium hydroxide (TMAOH),tetraethylammonium hydroxide (TEAOH) and sodium hydroxide (NaOH)].Structure of the product samples obtained were characterized by XRD,SEM,NH₃-TPD and BET methods.Their catalytic performance was evaluated through xylene isomerization reaction.The results showed that as comparing with the process that adopting NaOH as alkali source,the process adopting TMAOH or TEAOH can produce ammonium type EU-1 zeolite in one step.Particle size of the product obtained from the process adopting TEAOH as alkali source is in range of 200-500 nm,and its specific surface area achieves as high as 390.2 m²·g^-1.

Key words: zeolite, ammonium type, alkali source, xylene isomerization, catalytic performance