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


Water & Energy, Sharif University of Technology


Magnetic, Mössbauer, 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-fine Super Paramagnetic Fe3O4, whereas the nitrate impregnation gave larger size particles of Fe3O4 or α-Fe2O3. The active Fe5C2 component was converted to Fe3C during the above reaction.