ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Thermal stability of catalyst for ammonia synthesis based on cobalt molybdenum nitrides

Paweł Adamski, Dariusz Moszyński, Marlena Nadziejko, Agata Komorowska, Adam Sarnecki, and Aleksander Albrecht

West Pomeranian University of Technology, Szczecin, Szczecin, Poland

E-mail: dmoszynski@zut.edu.pl

Abstract: The formation and stability of an ammonia synthesis catalyst, based on cobalt molybdenum nitrides, were studied. The activation process of the catalyst was examined by in situ X-ray diffractometry. The thermal stability of obtained active phase of the catalyst was tested at 700 °C under ammonia atmosphere, N₂/H₂ mixture and under pure hydrogen. The presence of Co₂Mo₃N and Co₃Mo₃N phases in the catalyst was confirmed. The phase composition was stable in a long-term test performed under nitrogen/hydrogen atmosphere. Co₃Mo₃N phase decomposed into Co₆Mo₆N after exposure to pure hydrogen.

Keywords: Cobalt molybdenum nitrides ; Ammonia synthesis ; Thermal stability 

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-018-0642-0

Chemical Papers 73 (4) 851–859 (2019)