Highly Efficient Oxidation of Propane at Low Temperature over a Pt-Based Catalyst by Optimization Support.

Area of Science:

• Environmental Catalysis
• Materials Science
• Chemical Engineering

Background:

• Platinum-based catalysts are crucial for environmental protection, particularly in degrading light alkane pollutants.
• Developing catalysts with high activity, water resistance, and low-temperature hydrocarbon combustion suitability remains a significant challenge.

Purpose of the Study:

• To investigate the catalytic performance of platinum supported on niobium oxide (Pt/Nb2O5) for propane oxidation.
• To evaluate the catalyst's activity, durability, and performance under various harsh conditions relevant to industrial applications.

Main Methods:

• Synthesis and characterization of Pt/Nb2O5 catalyst.
• Evaluation of catalytic activity in propane oxidation.
• Testing catalyst stability under high-temperature aging and simulated industrial conditions (moisture, high space velocity, composite pollutants).

Main Results:

• The Pt/Nb2O5 catalyst demonstrated highly efficient catalytic activity in propane oxidation, surpassing most reported catalysts.
• Excellent activity and durability were maintained after aging at 700 °C and under challenging conditions like moisture and high space velocity.
• The catalyst's performance is attributed to abundant metallic Pt species on Nb2O5, facilitating C-H bond dissociation.

Conclusions:

• Pt/Nb2O5 is a promising catalyst for the catalytic oxidation of light alkanes, offering high activity and stability.
• The findings provide insights into designing superior catalysts for alkane oxidation, applicable to industrial pollution control.
• The proposed oxidehydrogenation and acrylate species pathway enhances propane oxidation efficiency on the Pt/Nb2O5 surface.