Design Specification for Hydrogen-Ammonia Coupled Offshore Wind Power Abandonment Utilization System with Pd Catalysts

Abstract

As China's offshore wind power develops into deep and distant sea and large scale, the problems of power abandonment, consumption and energy storage are highlighted, and the traditional grid-connected mode causes energy waste. This work is based on palladium (Pd) catalyst hydrogen-ammonia coupling system, through the "on-site hydrogen synthesis ammonia", to realize the conversion of abandoned power and green hydrogen storage and transportation, to develop a new path of new energy utilization. The system integrates PEM water electrolysis to produce hydrogen and Pd catalyzed nitrogen reduction to synthesize ammonia, breaking through the traditional bottleneck. Adopting Pd/graphene composite electrode, the electrolysis  efficiency  reaches  75% (15% improvement), and the Pd catalyst activates nitrogen at low potential and suppresses hydrogen precipitation. The "electricity-hydrogen-ammonia" triple-supply converts hydrogen into liquid ammonia (containing 17.6 wt% hydrogen), with storage and transportation costs of only 1/15 of hydrogen. 2.4×10⁸ kWh of abandoned electricity is handled annually by an offshore wind farm in Jiangsu, resulting in a significant reduction in emissions. The modular design is adapted to the offshore platform, and combined with intelligent scheduling to realize more than 90% of abandoned power consumption.