Mass production of aligned carbon nanotube arrays by fluidized bed catalytic chemical vapor deposition

Qiang Zhang, Meng Qiang Zhao, Jia Qi Huang, Jing Qi Nie, Fei Wei

Research output: Contribution to journalArticlepeer-review

86 Scopus citations

Abstract

A parametric study investigating the impacts of loading amount of active phase, growth temperature, H2 reduction, space velocity, and apparent gas velocity on the intercalated growth of vertically aligned carbon nanotube (CNT) arrays among lamellar catalyst was performed. A series of Fe/Mo/vermiculite catalysts with Fe/vermiculite ratio of 0.0075-0.300 were tested. Metal particles were dispersed among the layers of vermiculite after H2 reduction. Uniform catalyst particles, with a size of 10-20 nm and a density of 8.5 × 1014 m-2, were formed among the vermiculite layers at 650 °C. CNTs with high density synchronously grew into arrays among the vermiculites. With the increasing growth temperature, the alignment of CNTs intercalated among vermiculites became worse. Moreover, intercalated CNTs were synthesized among vermiculite layers in various flow regimes. The as-grown particles were with a size of 1-2 mm when the fluidized bed reactor was operated in particulate fluidization and bubbling fluidization, while the size of the as-grown products decreased obviously when they grown in the turbulent fluidized bed. Based on the understanding of the various parameters investigated, 3.0 kg/h of CNT arrays were mass produced in a pilot plant fluidized bed reactor.

Original languageEnglish (US)
Pages (from-to)1196-1209
Number of pages14
JournalCarbon
Volume48
Issue number4
DOIs
StatePublished - Apr 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Materials Science

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