Carbon nanotubes via methane decomposition on an alumina supported cobalt aerogel catalyst--颗粒学报PARTICUOLOGY

Piao, L., Chen, J., & Li, Y. (2003). Carbon nanotubes via methane decomposition on an alumina supported cobalt aerogel catalyst. China Particuology, 1(6), 266-270. https://doi.org/10.1016/S1672-2515(07)60007-4

Carbon nanotubes via methane decomposition on an alumina supported cobalt aerogel catalyst

Lingyu Piao, Jiuling Chen, Yongdan Li ^*

Department of Catalysis Science and Technology, School of Chemical Engineering, Tianjin University, Tianjin 300072, P. R. China

10.1016/S1672-2515(07)60007-4

Volume 1, Issue 6, December 2003, Pages 266-270

Received 25 September 2003, Accepted 19 November 2003, Available online 27 November 2007.

E-mail: ydli@tju.edu.cn

Highlights

Abstract

An alumina-supported cobalt aerogel catalyst prepared from a sol-gel and a supercritical drying method was used in the catalytic decomposition of methane. The physical-chemical properties of the catalyst were characterized and its activity for methane decomposition was investigated. The effects of calcination and reaction temperatures on the activity of the catalyst and the morphology of the carbon nanotubes produced were discussed. A CoAl₂O₄ spinel structure formed in the calcined catalyst. The quantity of the nanotubes produced in the reaction increases with the amount of cobalt in the reduced catalyst. A higher reaction temperature leads to a higher reaction rate, though faster deactivation of the catalyst occurs with the change. The carbon nanotubes grown on the catalyst have smooth walls and uniform diameter distribution.

Graphical abstract

Keywords

catalytic decomposition; methane; carbon nanotubes; sol-gel; aerogel; cobalt catalyst; morphology

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