Catalytic activity and selectivity of potassium-promoted Ultrafine particles of iron for liquid phase Fischer-Tropsch synthesis.

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  • ITOH Hiroyuki
    Department of Applied Chemistry, School of Science and Engineering, Waseda University
  • ONO Tomoyuki
    Department of Applied Chemistry, School of Science and Engineering, Waseda University
  • NAGANO Shin-ichi
    Department of Applied Chemistry, School of Science and Engineering, Waseda University
  • KIKUCHI Eiichi
    Department of Applied Chemistry, School of Science and Engineering, Waseda University

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Other Title
  • 液相法フィッシャー•トロプシュ合成におけるカリウム修飾鉄超微粒子触媒の活性および選択性

Description

Catalytic properties of the K-promoted ultrafine particles (UFP) of Fe for liquid phase Fischer-Tropsch (FT) synthesis were investigated at a high temperature (300°C). Activity of the promoted Fe UFP catalyst remarkably increased with time on stream, as contrasted with deactivation of the unpromoted Fe UFP catalyst and an ordinary K-promoted Fe precipitation catalyst. It is deduced that enhancement of the activity of K-promoted Fe UFP catalyst is attributed to formation of iron carbide having low crystallinity. Furthermore, selectivity of K-promoted Fe UFP catalyst for hydrocarbons in the liquid fraction was fairly high even at such a high temperature. Carbon number distribution of hydrocarbon products was analyzed in terms of a dual-site model.

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