Abstract

Abstract Effect of CO pretreatment on the iron-catalyzed Fischer-Tropsch Synthesis (FTS) was remarkable. The reduction pathway of a supported iron catalyst is changed by CO-pretreatment. The formation of structure-oriented carbides prevented the reduced iron particles from sintering due to metal-support interactions. A well defined iron catalyst was obtained by subsequentially reducing the carbides with H 2 . The present studies indicate that pretreatment with CO for the iron-containing catalyst significantly enhances the initial FTS reactivity of Fe/TiO 2 catalyst and remarkably improves the catalytic lifetime of Fe/SiO 2 catalyst. The competition model accounts satisfactorily for the time-dependent behavior of supported iron catalysts during Fisher-Tropsch synthesis.

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