Pt–Sn-based catalyst's intensification using Al 2O 3–SAPO-34 as a support for propane dehydrogenation to propylene

Abstract

The addition of Al 2O 3 up to 20% (as cementing agent) in SAPO-34 support significantly integrates metal functions of Pt–Sn-based catalyst, ultimately improves catalytic performance for direct propane dehydrogenation to propylene. Superior propane conversion (initially above 40%) and propylene selectivity (around 95%) is obtained experimentally over Pt–Sn/Al 2O 3–SAPO-34. The results were found promising and compared with Pt–Sn/SAPO-34 under identical operating conditions. Better platinum dispersion and higher active platinum sites are characterized by TEM and hydrogen-chemisorption analysis. Moreover, the possible metal interactions with different supports were configured. Therefore, light alkane dehydrogenation to alkene was enhanced using surface modified support Al 2O 3–SAPO-34 for Pt–Sn-based catalysts.