Effect of niobium promoter on iron-based catalyst for Fischer-Tropsch reaction
In the present work, we have modified Fe/CNTs catalysts with niobium. The catalysts were prepared using a wet impregnation method and promoted with niobium. Samples were characterized by nitrogen adsorption, H2-TPR, TPD, XRD and TEM. The Fischer-Tropsch Synthesis (FTS) was carried out in a fixed-bed...
| Main Authors: | Ali, S., Mohd Zabidi, N. A., Subbarao, D. |
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| Format: | Citation Index Journal |
| Institution: | Universiti Teknologi Petronas |
| Record Id / ISBN-0: | utp-eprints.7941 / |
| Published: |
Elsevier
2012
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| Subjects: | |
| Online Access: |
http://eprints.utp.edu.my/7941/1/proof_-16122011_-j__fuel_chem_tech.pdf http://eprints.utp.edu.my/7941/ |
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| Summary: |
In the present work, we have modified Fe/CNTs catalysts with niobium. The catalysts were prepared using a wet impregnation method and promoted with niobium. Samples were characterized by nitrogen adsorption, H2-TPR, TPD, XRD and TEM. The Fischer-Tropsch Synthesis (FTS) was carried out in a fixed-bed microreactor at 220°C, 1 atm and H2/CO=2 for 5h. Addition of niobium into Fe/CNTs increased the dispersion, decreased the average size of iron oxide nanoparticles and the catalyst reducibility. Niobium-promoted Fe catalyst resulted in appreciable increase in the selectivity of C5+ hydrocarbons and suppressed methane formation. These effects were more pronounced for the 0.04%Nb/Fe/CNTs catalyst, compared to those observed from other niobium compositions. The 0.04%Nb/Fe/CNTs catalyst enhanced the C5+ hydrocarbons selectivity by a factor of 67.5% and reduced the methane selectivity by a factor of 59.2%. |
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