Explorative Study of a Ru/CeO<sub>2</sub> Catalyst for NH<sub>3</sub> Synthesis from Renewable Hydrogen and Demonstration of NH<sub>3</sub> Synthesis under a Range of Reaction Conditions

The potential of Ru/CeO2 catalysts to catalyze the synthesis ammonia from renewable hydrogen was explored under ambient and high-pressure conditions. Different types Ru precursors, CeO2, their combinations strongly influenced NH3 activity. catalytic activities Ru(acac)3 Ru(NO)(NO3)3 were relatively high at pressure. activity 1 wt% with as a precursor studied dependence on temperature, pressure, space velocity, H2/N2 ratio investigated. parameter dependences differed somewhat between different CeO2. Use CeO2 surface area resulted in rates good low-pressure Demonstration using optimized catalyst performed bench-scale plant recirculation unreacted gases. measured more than 130 ratio. concentrations product gases close equilibrium value for reaction conditions around 400 °C. effects operation load response production acceptable. are candidates industrial hydrogen.