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

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+H۲) 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 Fe۳O۴, whereas the nitrate impregnation gave larger size particles of Fe۳O۴ or α-Fe۲O۳. The active Fe۵C۲ component was converted to Fe۳C during the above reaction.

Keywords:

Nanosize , Super Paramagnetic , Fine Particles , Mossbauer