Effect of Cobalt Catalyst Confinement in Carbon Nanotubes Support on Fischer-Tropsch Synthesis Performance

Pivehzhani, Omid Akbarzadeh and Mohd Zabidi, Noor Asmawati and Wahab, Yasmin Abdul and Hamizi, Nor Aliya and Chowdhury, Zaira Zaman and Merican, Zulkifli Merican Aljunid and Marlinda, Ab Rahman and Akhter, Shamima and Rasouli, Elisa and Johan, Mohd Rafie (2018) Effect of Cobalt Catalyst Confinement in Carbon Nanotubes Support on Fischer-Tropsch Synthesis Performance. Symmetry, 10 (11). p. 572. ISSN 2073-8994

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Official URL: https://doi.org/10.3390/sym10110572

Abstract

Pre-treating the multi-walled carbon nanotubes (CNTs) support by refluxing in 35 vol% nitric acid followed by heating at the temperature of 600 to 900 °C resulted in the formation of defects on the CNTs. Increasing the temperature of the pre-treatment of the CNTs from 600 °C to 900 °C, enhanced the fraction of cobalt-oxide nanoparticles encapsulated in the channels of CNTs from 31% to 70%. The performance of Co/CNTs in Fischer-Tropsch synthesis (FTS) was evaluated in a fixed-bed micro-reactor at a temperature of 240 °C and a pressure of 2.0 MPa. The highest CO conversion obtained over Co/CNTs. A.900 was 59% and it dropped by ~3% after 130 h of time-on-stream. However, maximum CO conversion using Co/CNTs. A.600 catalysts was 28% and it decreased rapidly by about 54% after 130 h of time-on-stream. These findings show that the combined acid and thermal pre-treatment of CNTs support at 900 °C has improved the stability and activity of the Co/CNTs catalyst in FTS.

Item Type: Article
Uncontrolled Keywords: carbon nanotubes; Fischer-Tropsch; thermal treatment; cobalt; catalyst; acid treatment
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
Divisions: Faculty of Science > Dept of Chemistry
Deputy Vice Chancellor (Research & Innovation) Office > Nanotechnology & Catalysis Research Centre
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 27 Sep 2019 03:14
Last Modified: 27 Sep 2019 03:14
URI: http://eprints.um.edu.my/id/eprint/22611

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