Embodiments of methods and apparatuses for producing ethylbenzene are provided. The method comprises the steps of introducing a first feed mixture comprising benzene and ethylene to UZM-8 zeolite-based catalyst at a first predetermined inlet temperature to form a first intermediate outlet stream comprising ethylbenzene and benzene. Ethylene is added to the first intermediate outlet stream to form a second intermediate feed mixture. The second intermediate feed mixture is introduced to beta zeolite-based catalyst at a second predetermined inlet temperature to form ethylbenzene.