Gold modified cobalt-based Fischer-Tropsch catalysts for conversion of synthesis gas to liquid fuels

Alan J. McCue, Jura Aponaviciute, Richard P. K. Wells, James A. Anderson

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The addition of Au as a promoter/modifier for alumina supported Co catalyst has been studied by combined in-situ high temperature, high pressure Fourier transform infrared (FTIR) and on-line gas chromatography. The combination of these tools permitted the state of the active catalyst surface to be monitored while following the elution of reaction products during the first 5-7 h on stream of the catalyst. The catalysts under study were a 10%Co/AlO and a 2.5%Au/10%Co/AlO. Samples were characterised before use using Raman and temperature programmed reduction (TPR). During the initial stages of reaction, hydrocarbons were built up on the surface of the catalyst as monitored by FTIR and the nature and amount of these species were assessed in terms of CH/CH ratio and the density of these alkyl fragments by employing absorption coefficients for the individual components. The nature and reducibility of the Co particles were modified by the presence of Au while the later also shifted the CO/H balance by acting as an effective water-gas shift catalyst during the early stages of reaction. This characteristic was lost during reaction as a consequence of redistribution of the two metallic phases.
Original languageEnglish
Pages (from-to)262-269
Number of pages8
JournalFrontiers of Chemical Science and Engineering
Volume7
Issue number3
DOIs
Publication statusPublished - 1 Sep 2013

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Synthesis gas
Liquid fuels
Cobalt
Gold
Catalysts
Fourier transforms
Infrared radiation
Water gas shift
Aluminum Oxide
Carbon Monoxide
Hydrocarbons
Reaction products
Gas chromatography
Alumina
Temperature

Keywords

  • gold modified catalyst
  • conversion of synthesis gas

Cite this

Gold modified cobalt-based Fischer-Tropsch catalysts for conversion of synthesis gas to liquid fuels. / McCue, Alan J.; Aponaviciute, Jura; Wells, Richard P. K.; Anderson, James A.

In: Frontiers of Chemical Science and Engineering, Vol. 7, No. 3, 01.09.2013, p. 262-269.

Research output: Contribution to journalArticle

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