Magnetic Studies of Fine Fe and Co Species Formed in Fe/Zeolite Catalysts

Magnetic, mossbauer, and i.r. studies of nanosize particles of fe and co species dispersed in a cage of aluminosilicates structure, in relation to syngas (co+h2) fischer tropsch conversion. the difference in the catalytic activity of such species have shown dependancy on their degree of dispersion. the carbonyl impregnation gave ultra-fme super paramagnetic fe3o4, whereas the nitrate impregnation gave larger size particles of fe3o4 or a-fe2o3. the active fe5c2 component was converted to fe3c during the above reaction.