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Research on Hydrogen Production from Ammonia Decomposition by Pulsed Plasma Catalysis
Yuze He1, Neng Zhu1, Yunkai Cai2,3
1School of Automobile and Traffic Engineering, Wuhan University of Science and Technology, Wuhan 430081, China.
Molecules (Basel, Switzerland)
|March 13, 2025
Summary
Non-thermal plasma (NTP) catalytic ammonia decomposition produces hydrogen for marine decarbonization. This study models NTP ammonia hydrogen production, optimizing conditions like temperature and pressure for improved ammonia conversion rates.
Area of Science:
- Chemical Engineering
- Plasma Science
- Marine Propulsion
Background:
- Marine engines are transitioning to low-carbon fuels to meet dual-carbon targets.
- Ammonium-hydrogen fuel is a promising solution for ship decarbonization.
- On-line hydrogen production via non-thermal plasma (NTP) catalytic ammonia is crucial for safe hydrogen energy utilization.
Purpose of the Study:
- To establish a kinetic model for NTP-catalyzed ammonia hydrogen production.
- To investigate the influence of reaction parameters on ammonia decomposition efficiency.
- To elucidate the reaction mechanism under ship engine emission conditions.
Main Methods:
- Development of a kinetic model for ammonia decomposition using NTP.
- Simulation and analysis of influencing factors: reaction temperature, pressure, and N2/NH3 ratio.
- Exploration of the reaction mechanism pathways.
Main Results:
- Increased reaction temperature enhances ammonia conversion rate.
- Increased pressure and N2/NH3 ratio decrease ammonia conversion rate.
- Optimal conditions (300 K, 1 bar, 98%N2/2%NH3) yielded a 16.7% ammonia conversion rate.
Conclusions:
- N2 addition, specifically through the N2(A3) + NH3 reaction, is key to promoting ammonia decomposition.
- Precise control of plasma catalytic hydrogen production is challenging but crucial for improving ammonia conversion.
- The kinetic model provides insights for optimizing NTP ammonia hydrogen production for marine applications.
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