Sustainable production of green feed from carbon dioxide and hydrogen

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78 Scopus citations


Carbon dioxide hydrogenation to form hydrocarbons was conducted on two iron-based catalysts, prepared according to procedures described in the literature, and on a new iron spinel catalyst. The CO2 conversion measured in a packed-bed reactor was limited to about 60 % because of excessive amounts of water produced in this process. Switching to a system of three packed-bed reactors in series with interim removal of water and condensed hydrocarbons increased CO2 conversion to as much as 89 %. The pure spinel catalyst displayed a significantly higher activity and selectivity than those of the other iron catalysts. This process produces a product called green feed, which is similar in composition to the product of a high-temperature, iron-based Fischer-Tropsch process from syngas. The green feed can be readily converted into renewable fuels by well-established technologies. Drying out: A new iron-based spinel catalyst tested in a new configuration of fixed-bed reactors in series displays a dramatic increase in activity and productivity of C5+ hydrocarbons from CO2 in comparison with other published catalysts (see picture). The results can be considered as a breakthrough in one of the key steps required for the conversion of CO 2 and water to liquid fuels and represents a feasible process.

Original languageEnglish
Pages (from-to)785-794
Number of pages10
Issue number3
StatePublished - 1 Jan 2014


  • heterogeneous catalysis
  • hydrocarbons
  • hydrogenation
  • iron
  • sustainable chemistry

ASJC Scopus subject areas

  • Environmental Chemistry
  • General Chemical Engineering
  • General Materials Science
  • General Energy


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