Decomposition of Hydroxylammonium Nitrate Solution Over Nanoporous CuO Supported on Honeycomb

Area of Science:

• Catalysis
• Materials Science
• Chemical Engineering

Background:

• Hydroxylammonium nitrate (HAN) is an important energetic material.
• Efficient catalytic decomposition of HAN is crucial for safety and performance.
• Honeycomb structures offer high surface area for catalyst support.

Purpose of the Study:

• To investigate the effect of copper loading strategies on honeycomb catalysts for HAN decomposition.
• To compare the catalytic performance of metal coating (MC) and metal alumina coating (MAC) methods.
• To evaluate the activity and heat resistance of the developed catalysts.

Main Methods:

• Synthesis of copper-supported honeycomb catalysts using MC and MAC methods.
• Characterization of catalysts using N₂ adsorption, X-ray diffraction (XRD), and scanning electron microscopy (SEM).
• Evaluation of catalytic performance in the decomposition of aqueous HAN solutions.

Main Results:

• The Cu(16.8)/honeycomb-MC catalyst exhibited a lower decomposition onset temperature than the Cu(7.0)/honeycomb-MAC catalyst.
• Higher copper loading and improved copper dispersion in the MC catalyst contributed to enhanced performance.
• The Cu(16.8)/honeycomb-MC catalyst demonstrated excellent activity and heat resistance.

Conclusions:

• The copper loading strategy significantly influences the catalytic performance of honeycomb structures.
• The metal coating (MC) method is superior to the metal alumina coating (MAC) method for preparing active and stable HAN decomposition catalysts.
• The Cu(16.8)/honeycomb-MC catalyst shows great potential for practical applications requiring efficient HAN decomposition.