The kinetic studies of ammonia synthesis over a barium-promoted cobalt catalyst supported on magnesium–lanthanum mixed oxide were performed. The commercial iron catalyst was used for comparison purposes. Measurements were carried out under conditions close to the industrial ones, i.e. at the temperature of 400, 440, 480°C, pressure of 9.0 MPa and various NH₃ concentrations in the inlet gas. The cobalt catalyst displayed higher catalytic activity in the entire tested range of temperature and ammonia concentrations in comparison to the iron catalyst. The catalytic behaviour in ammonia synthesis process was analysed with a power-law rate equation and the reaction orders with respect to H₂ and NH₃ were determined. There was no difference in the values of the reaction order with respect to H₂ for both the catalysts indicating that NH₃ synthesis reaction rate is not inhibited by hydrogen. In contrast, the reaction order with respect to NH₃ varied on the catalyst. The cobalt-based catalyst had a less negative value of the reaction order with respect to NH₃ revealing a lower inhibition by product itself (NH₃) compared to the iron catalyst. Due to its high activity the cobalt-based catalyst may be considered as a valuable alternative to the iron catalyst for ammonia synthesis process.

进行了在镁镧混合氧化物上负载的钡促进的钴催化剂上氨合成的动力学研究。商业铁催化剂用于比较目的。测量是在接近工业温度的条件下进行的，即在400、440、480的温度下°C，9.0 MPa的压力和进气中各种NH ₃浓度。与铁催化剂相比，钴催化剂在温度和氨气浓度的整个测试范围内显示出更高的催化活性。用幂律速率方程分析了氨合成过程中的催化行为，并确定了对H ₂和NH ₃的反应顺序。两种催化剂的相对于H ₂的反应顺序的值均无差异，表明NH _3的合成反应速率不受氢的抑制。相反，关于NH ₃的反应顺序在催化剂上有所不同。相对于NH ₃，钴基催化剂的反应级数的负值较小，与铁催化剂相比，产物本身（NH ₃）的抑制作用较低。由于其高活性，钴基催化剂可被认为是用于氨合成过程的铁催化剂的有价值的替代物。