Journal
CHEMSUSCHEM
Volume 7, Issue 3, Pages 785-794Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201301181
Keywords
hydrocarbons; hydrogenation; heterogeneous catalysis; iron; sustainable chemistry
Funding
- I-SAEF
- Israel Science Foundation (I-CORE)
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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.
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