Abstract
Modification by a halogen containing compound made the Pt/KL zeolite catalyst more active and selective than the original Pt/KL zeolite in the aromatization of C6 and C7 fractions in naphtha. Furthermore, the catalyst life of the halogen-modified Pt/KL (Pt/FKL) was much longer than that of Pt/KL due to less carbon formation rate. These features led Pt/FKL to industrial applications. TEM, H2 adsorption, and NH3-TPD measurements revealed that the treatment of Pt/KL with halogen produces well dispersed Pt without changing the acidic property of the catalyst. The Pt/FKL catalyst has been commercialized as Aromax® II catalyst; it was loaded into several Aromax® process units in Saudi Arabia, USA, and Spain.
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