%0 Journal Article %T Magnetic Studies of Fine Fe And Co Species Formed in Fe/Zeolite Catalysts %J International Journal of Engineering %I Materials and Energy Research Center %Z 1025-2495 %A Oskoie, Mohammad Mahdi %D 2008 %\ 06/01/2008 %V 21 %N 2 %P 173-180 %! Magnetic Studies of Fine Fe And Co Species Formed in Fe/Zeolite Catalysts %K Nanosize %K Super Paramagnetic %K Fine Particles %K Mossbauer %R %X 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. %U https://www.ije.ir/article_71709_716e2ec2f2b945dca4cac05ca9c6d1c5.pdf