Comparison of the activity of Ru-K/Sibunit catalysts in ammonia synthesis and decomposition

Ru-K/Sibunit catalysts with different molar ratio of promotor and active component were studied in the low- temperature synthesis and decomposition of ammonia. It was shown that activity of the catalysts in the synthesis reaction increases with the molar ratio of potassium and ruthenium: 0.087 and 0.397 mmol NH3/gcat*h for K/Ru = 0.5 and 2.5, respectively, at a temperature of 350 C, whereas in the decomposition reaction the activity decreases and is equal to 349.2 and 73.8 mmol NH3/gcat*h, respectively, for K/Ru = 0.5 and 2.5 at 450 C.