Effect of niobium promoter on iron-based catalyst for Fischer-Tropsch reaction

Sardar ALI; Noor Asmawati MOHD ZABIDI; Duvvuri SUBBARAO

Effect of niobium promoter on iron-based catalyst for Fischer-Tropsch reaction

1.
Department of Chemical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak, Malaysia;
2.
Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak, Malaysia

基金项目: Ministry of Science, Technology and Innovation (E-Science Fund, 03-02-02-SF0036);Ministry of Higher Education Malaysia(FRGS/2/2010/SG/UTP/02/3) and Universiti Teknologi PETRONAS (31/09.10).

详细信息

通讯作者:
Noor Asmawati MOHD ZABIDI, Tel:605-3688210, E-mail:noorasmawati_mzabidi@petronas.com.

中图分类号: TQ529.2
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出版历程
- 收稿日期: 2011-08-15
- 修回日期: 2011-12-01
- 刊出日期: 2012-01-31

Effect of niobium promoter on iron-based catalyst for Fischer-Tropsch reaction

1.
Department of Chemical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak, Malaysia;
2.
Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak, Malaysia

Funds: Ministry of Science, Technology and Innovation (E-Science Fund, 03-02-02-SF0036);Ministry of Higher Education Malaysia(FRGS/2/2010/SG/UTP/02/3) and Universiti Teknologi PETRONAS (31/09.10).

摘要

摘要: Niobium-promoted Fe/CNTs catalysts were prepared using a wet impregnation method. 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 ℃, 1 atm and H₂/CO=2 for 5 h. 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%.
- CNTs /
- iron /
- niobium /
- Fischer-Tropsch synthesis
Abstract: Niobium-promoted Fe/CNTs catalysts were prepared using a wet impregnation method. 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 ℃, 1 atm and H₂/CO=2 for 5 h. 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%.
- CNTs /
- iron /
- niobium /
- Fischer-Tropsch synthesis

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参考文献(21)

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