Citation: Zahra Gholami, Noor Asmawati Mohd Zabidi, Fatemeh Gholami, Mohammadtaghi Vakili. Synthesis and characterization of niobium-promoted cobalt/iron catalysts supported on carbon nanotubes for the hydrogenation of carbon monoxide[J]. Journal of Fuel Chemistry and Technology, ;2016, 44(7): 815-821. shu

Synthesis and characterization of niobium-promoted cobalt/iron catalysts supported on carbon nanotubes for the hydrogenation of carbon monoxide

1.
Centralized Analytical Laboratory, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 32610 Tronoh, Perak, Malaysia
2.
Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 32610 Tronoh, Perak, Malaysia
3.
Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia
4.
School of Industrial Technology, Universiti Sains Malaysia, 11800 Penang, Malaysia

Corresponding author: Zahra Gholami, zahra.gholami@petronas.com.my
Received Date: 11 March 2016
Revised Date: 5 May 2016

Fund Project: The project was supprted by Short Term Internal Research Fund Universiti Teknologi PETRONAS 0153AA-D06

Figures(8)

Bimetallic Co/Fe catalysts supported on carbon nanotubes (CNTs) were prepared, and niobium (Nb) was added as promoter to the 70Co:30Fe/CNT catalyst. The physicochemical properties of the catalysts were characterized, and the catalytic performances were analyzed at the same operation conditions (H₂:CO (volume ratio)=2:1, p=1 MPa, and t=260 ℃) in a tubular fixed-bed microreactor system. The addition of Nb to the bimetallic catalyst decreases the average size of the oxide nanoparticles and improves the reducibility of the bimetallic catalyst. Evaluation of the catalyst performance in a Fischer-Tropsch reaction shows that the catalyst results in high selectivity to methane, and the selectivity to C₅₊ increased slightly in the bimetallic catalyst unlike that in the monometallic catalysts. The addition of 1% Nb to the bimetallic catalyst increases CO conversion and selectivity to C₅₊. Meanwhile, a decrease in methane selectivity is observed.
- Fischer-Tropsch synthesis,
- bimetallic catalyst,
- niobium promoter,
- carbon nanotubes
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