Promoter effects on precipitated iron catalysts for Fischer-Tropsch synthesis

Dragomir B. Bukur, Doble Mukesh, Snehal A. Patel

Research output: Contribution to journalArticle

232 Citations (Scopus)

Abstract

The effects of potassium and copper promotion on the activity and selectivity of precipitated iron catalysts for Fischer-Tropsch synthesis (FTS) were studied in a fixed bed reactor at 1.48 MPa and 235-265°C using synthesis gas with a H2/CO = 1 molar feed ratio. It was found that both potassium and copper increase the catalyst activity for FTS and the water gas shift reaction. Potassium promotion (∼0.2-1 wt %) results in an increase in the average molecular weight of hydrocarbon products and suppression of secondary reactions (olefin hydrogenation and isomerization of 1-alkenes to 2-alkenes). Copper promotion (∼3 wt %) has a similar effect on the hydrocarbon distribution, but it enhances slightly the secondary reactions. The activity of doubly promoted (100 Fe/3 Cu/x K, x = 0.2 or 0.5) catalysts was higher than that of singly promoted catalysts and was independent of potassium loading, whereas their selectivity behavior was strongly influenced by their potassium loading. Product selectivities on the 100 Fe/3 Cu/0.2 K catalyst were similar to those of the 100 Fe/3 Cu catalyst, whereas selectivities of the 100 Fe/3 Cu/0.5 K catalyst were similar to those obtained in tests with the 100 Fe/0.5 K catalyst.

Original languageEnglish
Pages (from-to)194-204
Number of pages11
JournalIndustrial and Engineering Chemistry Research
Volume29
Issue number2
Publication statusPublished - 1990
Externally publishedYes

Fingerprint

Fischer-Tropsch synthesis
Iron
catalyst
Potassium
iron
Catalysts
Alkenes
potassium
Olefins
Copper
Catalyst selectivity
Hydrocarbons
alkene
Catalyst activity
copper
Water gas shift
Synthesis gas
Carbon Monoxide
hydrocarbon
Isomerization

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Environmental Science(all)
  • Polymers and Plastics

Cite this

Promoter effects on precipitated iron catalysts for Fischer-Tropsch synthesis. / Bukur, Dragomir B.; Mukesh, Doble; Patel, Snehal A.

In: Industrial and Engineering Chemistry Research, Vol. 29, No. 2, 1990, p. 194-204.

Research output: Contribution to journalArticle

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