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

Symmetry

ZairaZaman Chowdhury¹  NoorAsmawati Mohd Zabidi¹  Elisa Rasouli¹  Marlinda Ab Rahman¹  Yasmin Abdul Wahab²  MohdRafie Johan²  NorAliya Hamizi³  Zulkifli Merican Aljunid Merican³  Omid Akbarzadeh³  Shamima Akhter³ 

[1] Catalysis Research Centre, University of Malaya, Kuala Lumpur 50603, Malaysia;Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Perak 32610, Malaysia;;Nanotechnology &

关键词: carbon nanotubes;    Fischer-Tropsch;    thermal treatment;    cobalt;    catalyst;    acid treatment;   

DOI  :  10.3390/sym10110572

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown