Effect of pH, Acid and Thermal Treatment Conditions on Co/CNT Catalyst Performance in Fischer–Tropsch Reaction

Akbarzadeh, Omid and Mohd Zabidi, Noor Asmawati and Hamizi, Nor Aliya and Wahab, Yasmin Abdul and Merican, Zulkifli Merican Aljunid and Yehya, Wageeh Abdulhadi and Akhter, Shamima and Shalauddin, Md and Rasouli, Elisa and Johan, Mohd Rafie (2019) Effect of pH, Acid and Thermal Treatment Conditions on Co/CNT Catalyst Performance in Fischer–Tropsch Reaction. Symmetry, 11 (1). p. 50. ISSN 2073-8994, DOI https://doi.org/10.3390/sym11010050.

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Official URL: https://doi.org/10.3390/sym11010050


Multiwalled carbon nanotubes (CNT) supported cobalt oxide was prepared as a catalyst by strong electrostatic adsorption (SEA) method. The CNT support was initially acid- and thermal-treated in order to functionalize the support to uptake more Co clusters. The Co/CNT were characterized by a range of analytical methods including transmission electron microscopy (TEM), temperature programmed reduction with hydrogen (H2-TPR), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, atomic absorption spectroscopy (AAS), Zeta sizer particle size analysis and Brunauer-Emmett-Teller (BET) surface area analysis. TEM images showed cobalt particles were highly dispersed and impregnated at both exterior and interior walls of the CNT support with a narrow particle size distribution of 6-8 nm. In addition, the performance of the synthesized Co/CNT catalyst was tested using Fischer-Tropsch synthesis (FTS) reaction which was carried out in a fixed-bed micro-reactor. H2-TPR profiles indicated the lower reduction temperature of 420 °C was required for the FTS reaction. The study revealed that cobalt is an effective metal for Co/CNT catalysts at pH 14 and at 900 °C calcination temperature. Furthermore, FTS reaction results showed that CO conversion and C5+ selectivity were recorded at 58.7% and 83.2% respectively, which were higher than those obtained using a Co/CNT catalyst which pre-treated at a lower thermal treatment temperature and pH. © 2019 by the authors.

Item Type: Article
Funders: Universiti Teknologi PETRONAS, University of Malaya, Nanotechnology and Catalysis Research Centre (RU011-2017 Grant), Ministry of Education of Malaysia under the Fundamental Research Grant Scheme FRGS/1/2012/SG01/UTP/02/01
Uncontrolled Keywords: carbon nanotubes; thermal treatment; cobalt; Fischer–Tropsch; catalyst; acid treatment
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science > Department of Chemistry
Deputy Vice Chancellor (Research & Innovation) Office > Nanotechnology & Catalysis Research Centre
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 27 May 2020 04:45
Last Modified: 27 May 2020 04:45
URI: http://eprints.um.edu.my/id/eprint/24378

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