Hydrothermal synthesis of highly cross ‐linked PtZn@Silicalite‐1 structured catalysts for propane dehydrogenation

AbstractStructured catalysts coatings exhibit excellent performance on non-adiabatic gas –solid process, deriving from their enhanced heat and mass transfer properties. However, the coating catalysts prepared by traditional hydrothermal method of zeolite encapsulating noble metal are prone to spalling, especially under conditions of large flow rate and high temperature. Herein, we pre pared PtZn clusters encapsulated in silicalite-1 zeolite coating on stainless steel with high bonding strength by an improved in situ growth method. The optimized catalyst exhibited ultra-thin, uniform, continuous, and high degree of crosslinking, thereby enhancing mass transfer and thermal stabilit y. In propane dehydrogenation reaction, the optimized PtZn@S-1-R showed a high specific activity of 14.7 molC3H6$$ {\mathrm{mol}}_{{\mathrm{C}}_3{\mathrm{H}}_6} $$ molPt−1 s−1 and a propylene selectivity above 99% at 600 °C with a high weight hourly space velocity of 120 h−1. The metal-encapsulated zeolite coating catalysts broaden the application avenue for heterogeneous catalysis with great application prospects.

Source: AIChE Journal - March 28, 2024 Category: Science Authors: Liming Xia, Bofeng Zhang, Gang Hou, Li Wang, Sibao Liu, Guozhu Liu Tags: RESEARCH ARTICLE Source Type: research