The role of nano-sized iron particles in slurry phase Fischer–Tropsch synthesis

The slurry phase Fischer–Tropsch (F–T) activity of three α-Fe 2O 3-based materials, two unsupported nano-sized, NANOCAT (3 nm) and BASF (20–80 nm), and a supported micron-sized (32.5 μm) UCI, are compared with respect to total hydrocarbon production from synthesis gas (H 2/CO∼2/1) at 513 K. Low temp...

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Bibliographic Details
Published inCatalysis communications Vol. 4; no. 3; pp. 101 - 107
Main Authors Mahajan, Devinder, Gütlich, Philipp, Stumm, Ulrich
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.03.2003
Subjects
Fischer–Tropsch
Hydrocarbon synthesis
Nano catalysis
Slurry phase catalysis
Fischer–Tropsch
Nano catalysis
Slurry phase catalysis
Hydrocarbon synthesis
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ISSN1566-7367
1873-3905
DOI10.1016/S1566-7367(03)00002-5

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Summary:The slurry phase Fischer–Tropsch (F–T) activity of three α-Fe 2O 3-based materials, two unsupported nano-sized, NANOCAT (3 nm) and BASF (20–80 nm), and a supported micron-sized (32.5 μm) UCI, are compared with respect to total hydrocarbon production from synthesis gas (H 2/CO∼2/1) at 513 K. Low temperature Mössbauer spectra of the quenched slurry samples after 120 h on-line show that all three catalysts are essentially a mixture of oxide and carbide phases with magnetite (Fe 3O 4) being the dominant phase. TEM images of the quenched samples reveal unexpected particle characteristics. While both unsupported nano-sized materials essentially avoid expected agglomeration, the micron-sized UCI transforms into nano-sized material. These results suggest a crucial role of nano Fe during F–T synthesis.
ISSN:1566-7367
1873-3905
DOI:10.1016/S1566-7367(03)00002-5