The catalytic activity of the industrial catalyst A 110 3 after modification with Mn 2+ was found to be increased to about 17.4%. The ammonia synthesis was carried out under conditions of 2 1 MPa, 14400 h -1 and 300 ℃. The increase in activity is explained in terms of the weakness of Fe NN or Fe—N bond based on the XPS and TPD MS results.
Ni/MgO and Ni MgO/MgO catalysts for partial oxidation of methane to syngas were prepared by ordinary impregnation method and impregnation promoted by supported salt. The catalytic performance were characterized by TPR, TPO, TPMC (Temperature Programmed Methane decomposition Carbon deposition) and activity examination techniques. The results showed that Ni MgO interaction of the promoted catalyst is stronger than that of the common one, and the resisting carbon deposition ability of the promoted catalyst is increased. Therefore the activity and selectivity of the promoted catalyst are enhanced.
