Pt−Sn-Based SAPO-34 Supported Novel Catalyst for n-Butane Dehydrogenation

The performance of Pt−Sn/SAPO-34 novel catalyst was investigated for n -butane dehydrogenation. The catalyst was characterized by number of physiochemical techniques X-ray fluorescence (XRF), X-ray diffraction (XRD), ammonia temperature-programmed desorption (NH 3 -TPD), hydrogen temperature-programmed reduction (H 2 -TPR), temperature-programmed oxidation (TPO), transmission electron microscopy (TEM), and O 2 -pulse coke measurement. The metallic contents, structure, acidity, and metallic dispersion were determined in order to explain catalyst superiority and functionality using SAPO-34 as support. Pt−Sn-based SAPO-34 supported catalyst was parametrically characterized in order to obtain superior control of dehydrogenation reaction stereochemistry. Above 91% of total olefins with 80% butene was achieved over Pt−Sn/SAPO-34. The weight hourly space velocity 2.8 h −1 and temperature 585 °C were found to be optimum for the higher dehydrogenation activity. The catalysts also showed very good hydrothermal stability in continuous reaction−regeneration cycles. The coke formation was mainly related to catalyst activity.