Mössbauer investigation of supported Fe catalysts. III. In situ kinetics and spectroscopy during Fischer-Tropsch synthesis

G. B. Raupp, W. N. Delgass

Research output: Contribution to journalArticle

177 Scopus citations

Abstract

In situ constant velocity Mössbauer data have been used to measure the rate of carbiding of 10Fe SiO2 and 10Fe MgO during the Fischer-Tropsch synthesis reaction at 523 °K and 3.3 H2 CO. Simultaneous spectroscopic and kinetic measurements reveal the remarkable result that the reaction rate follows the extent of bulk carbide formation and, thus, that incorporation of carbon into the iron particles controls the number of active surface sites until carbiding is complete. Conversion, paraffin to olefin ratio, and C2 C1 ratio increase with extent of carbiding. Hydrogenation of a fully carbided catalyst at 523 °K is slow and produces only methane.

Original languageEnglish (US)
Pages (from-to)361-369
Number of pages9
JournalJournal of Catalysis
Volume58
Issue number3
DOIs
StatePublished - Jul 1979
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

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