NH3 Synthesis with Ca2NH supported Ru catalyst under mild conditions

Calcium nitride-hydride supported Ru has demonstrated superior catalytic performance among Ru-based catalysts according to literature. This work explores the impact of Ca2NH synthesis precursors on the catalytic performance of Ru-Ca2NH in ammonia synthesis, with the goal of gaining deeper insight into their role. For this reason, beta-Ca2NH was synthesized using CaH2 and N2, which is different from reported in the literature. The structure of the synthesized material was carefully analysed and confirmed via XRD. Subsequently, Ru-Ca2NH catalysts were prepared at varying percentages, ranging from 1 % to 10 %, to determine the optimum amount of Ru. The performance of these catalysts was investigated in ammonia synthesis reactions conducted under the continuous gas flow at 340 degrees C and 0.1 MPa. UV-Vis spectrometry was carried out to determine total ammonia production rate, and was calculated as 1.6 mmol/g cat. h. This production rate was higher than the performance of most of the reported Ru-based catalysts.