期刊
SYMMETRY-BASEL
卷 11, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/sym11010007
关键词
carbon nanotubes; Fischer-Tropsch; thermal treatment; cobalt; catalyst; acid treatment
资金
- Universiti Teknologi PETRONAS
- University of Malaya, Nanotechnology and Catalysis Research Centre [RU011-2017]
- Ministry of Education of Malaysia under Fundamental Research Grant Scheme [FRGS/1/2012/SG01/UTP/02/01]
The strong electrostatic adsorption (SEA) method was applied to the synthesis of a cobalt (Co) catalyst on a multi-walled carbon nanotube (CNT) support. In order to uptake more of the cobalt cluster with higher dispersion, the CNT was functionalized via acid and thermal treatment. The Co/CNT catalyst samples were characterized by a range of methods including the Brunauer-Emmet-Teller (BET) surface area analyzer, transmission electron microscopy (TEM), X-ray powder diffraction (XRD) analysis, atomic absorption spectroscopy (AAS), and H-2-temperature programmed reduction (H-2-TPR) analysis. The data from the TEM images revealed that the catalyst was highly dispersed over the external and internal walls of the CNT and that it demonstrated a narrow particle size of 6-8 nm. In addition, the data from the H-2-TPR studies showed a lower reduction temperature (420 degrees C) for the pre-treated catalyst samples. Furthermore, a Fischer-Tropsch synthesis (FTS) reaction was chosen to evaluate the Co/CNT catalyst performance by using a fixed-bed microreactor at different parameters. Finally finding the optimum value of the cobalt loading percentage, particle size, and calcination conditions of Co/CNT catalyst resulted in a CO conversion and C5+ selectivity of 58.7% and 83.2%, respectively.
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