%0 Journal Article %@ 20738994 %A Akbarzadeh, O. %A Mohd Zabidi, N.A. %A Wahab, Y.A. %A Hamizi, N.A. %A Chowdhury, Z.Z. %A Merican, Z.M.A. %A Ab Rahman, M. %A Akhter, S. %A Rasouli, E. %A Johan, M.R. %D 2018 %F scholars:9812 %I MDPI AG %J Symmetry %N 11 %R 10.3390/sym10110572 %T Effect of cobalt catalyst confinement in carbon nanotubes support on Fischer-Tropsch synthesis performance %U https://khub.utp.edu.my/scholars/9812/ %V 10 %X 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. © 2018 by the authors. %Z cited By 23