Fischer–Tropsch synthesis over iron catalysts supported on carbon nanotubes
Carbon nanotubes (CNTs) were synthesized in a catalytic reaction over an iron catalyst using CaCO 3 as a support. The purification of the carbon nanotubes (CNTs) and the oxidation of the CNTs surfaces were performed with HNO 3. Iron-based catalysts supported on carbon nanotubes for use in the Fische...
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Veröffentlicht in: | Applied catalysis. A, General General, 2005-06, Vol.287 (1), p.60-67 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Carbon nanotubes (CNTs) were synthesized in a catalytic reaction over an iron catalyst using CaCO
3 as a support. The purification of the carbon nanotubes (CNTs) and the oxidation of the CNTs surfaces were performed with HNO
3. Iron-based catalysts supported on carbon nanotubes for use in the Fischer–Tropsch (FT) reaction were prepared either by incipient wetness or a deposition precipitation method using urea and then promoted with potassium and/or copper. The FT synthesis was carried out in a fixed-bed micro reactor (275
°C, 8
bar, CO/H
2
=
2). The effect of Cu and promoters on CO conversion, product selectivity and FT synthesis activity were investigated and compared with data reported on other carbon-based supports. The potassium promoted catalysts gave higher yields of CO
2 and C
2 olefins and the lowest methane selectivity when compared to the unpromoted catalysts. Copper, while enhancing catalyst activity, did not have an effect on the FT product selectivity. |
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ISSN: | 0926-860X 1873-3875 |
DOI: | 10.1016/j.apcata.2005.03.029 |