Alkaline-earth ion stabilized sub-nano-platinum tin clusters for propane dehydrogenation.

ABSTRACT: The strong promotion effects of alkali/alkaline earth metals are frequently reported for heterogeneous catalytic processes such as propane dehydrogenation (PDH), but their functioning principles remain elusive. This paper describes the effect of the addition of calcium (Ca) on reducing the deactivation rate of platinum-tin (Pt-Sn) catalyzed PDH from 0.04 h^-1 to 0.0098 h^-1 at 873 K under a WHSV of 16.5 h^-1 of propane. The Pt-Sn-Ca catalyst shows a high propylene selectivity of >96% with a propylene production rate of 41 mol_C3H6 (g_Pt h)^-1 and ∼1% activity loss after regeneration. The combination of characterization and DFT simulations reveals that Ca acts as a structural promoter favoring the transition o

SUBMITTER: Lu Z 

PROVIDER: S-EPMC10793213 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature