Role of Sn in the Regeneration of Pt/γ-Al₂O₃ Light Alkane Dehydrogenation Catalysts.

ABSTRACT: Alumina-supported Pt is one of the major industrial catalysts for light alkane dehydrogenation. This catalyst loses activity during reaction, with coke formation often considered as the reason for deactivation. As we show in this study, the amount and nature of carbon deposits do not directly correlate with the loss of activity. Rather, it is the transformation of subnanometer Pt species into larger Pt nanoparticles that appears to be responsible for the loss of catalytic activity. Surprisingly, a portion of the Sn remains atomically dispersed on the alumina surface in the spent catalyst and helps in the redispersion of the Pt. In the absence of Sn on the alumina support, the larger Pt nanoparticles formed during reaction are not redispersed during oxidative regeneration. It is known that

SUBMITTER: Pham HN 

PROVIDER: S-EPMC4822188 | biostudies-literature | 2016 Apr

REPOSITORIES: biostudies-literature