Ultradurable Regenerative Propane Dehydrogenation Catalyst by Fluorination-Induced Confining and Positioning.

Area of Science:

• Catalysis
• Materials Science
• Chemical Engineering

Background:

• Propane dehydrogenation (PDH) requires catalysts with high activity, selectivity, and stability.
• Current catalysts face challenges with sintering, coke deposition, and complex regeneration processes.

Purpose of the Study:

• To develop a novel catalyst for PDH with enhanced performance and simplified regeneration.
• To investigate the structure-activity relationship of fluorinated MFI zeolite-clothed PtSn catalysts.

Main Methods:

• Synthesis of fluorinated siliceous MFI zeolite-clothed PtSn catalyst.
• Characterization of catalyst structure and composition.
• Evaluation of catalytic performance in PDH under industrially relevant conditions.

Main Results:

• The catalyst achieved near-thermodynamic-limited propane conversion and 94% propylene selectivity.
• Demonstrated remarkable resistance to sintering and coke deposition over 5000 hours.
• Enabled simple catalyst regeneration via H2 treatment, avoiding harsh oxychlorination.

Conclusions:

• The unique F-modified PtSn/MFI zeolite catalyst provides a feasible strategy for industrial PDH.
• Synergy between catalyst components enhances PDH selectivity and stability.
• The catalyst design offers a sustainable and efficient solution for propylene production.