Temperature programmed reduction study of alumina supported Fe3+ catalysts |
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| Authors: | A Lycourghiotis and D Vattis |
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| Institution: | (1) Physical Chemistry Laboratory, University of Patras, Patras, Greece |
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| Abstract: | The influence of the calcination temperature and Fe3+ content on the solubility of iron(III) in the alumina lattice has been investigated, using temperature programmed reduction (T.P.R.). It was found that the main quantity of Fe3+ species is dissolved in the region 200–320 °C. The solubility of the Fe3+ was almost constant in the range of 320–665 °C. This is found to be the case irrespective of the Fe3+ content at 665 °C. The surface Fe3+ species generally differs from the bulk  -Fe2O3.
                    Fe3+   (III)     - .  ,   Fe3+ 200–320 °C.  Fe3+ 320–665 °C.  , 665 °C  Fe3+.   Fe3+ -Fe2O3.
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