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Effects of Cobalt Loading, Particle Size, and Calcination Condition on Co/CNT Catalyst Performance in Fischer–Tropsch Reactions

Authors :
Omid Akbarzadeh
Noor Asmawati Mohd Zabidi
Yasmin Abdul Wahab
Nor Aliya Hamizi
Zaira Zaman Chowdhury
Zulkifli Merican Aljunid Merican
Marlinda Ab Rahman
Shamima Akhter
Md Shalauddin
Mohd Rafie Johan
Source :
Symmetry, Vol 11, Iss 1, p 7 (2018)
Publication Year :
2018
Publisher :
MDPI AG, 2018.

Abstract

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 H2-temperature programmed reduction (H2-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 H2-TPR studies showed a lower reduction temperature (420 °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.

Details

Language :
English
ISSN :
20738994
Volume :
11
Issue :
1
Database :
Directory of Open Access Journals
Journal :
Symmetry
Publication Type :
Academic Journal
Accession number :
edsdoj.3df66ca09574410a83635885c5e4d5af
Document Type :
article
Full Text :
https://doi.org/10.3390/sym11010007