The effect of the complex carbon treatment (in sequence: preliminary high t
emperature heating in an inert atmosphere, partial gasification in CO2 and
final heating) on its texture and the activity of the resultant Ba-promoted
ruthenium catalysts in NH3 synthesis was studied. Both the preliminary and
final heating steps lead mainly to the disappearance of small pores, the e
ffect of the latter step being smaller. In contrast, the gasification (34.0
%) in CO2 develops the pore structure of the support. The Ba-Ru/C catalysts
proved to be very active and stable in NH3 synthesis (p = 63 bar, T = 400
degrees C, X-NH3 = 8%), especially those supported on the carbons of well d
eveloped texture.