Sub-millimeter-long carbon nanotubes repeatedly grown on and separated from ceramic beads in a single fluidized bed reactor

Dong Young Kim, Hisashi Sugime, Kei Hasegawa, Toshio Ohsawa, Suguru Noda

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

A semi-continuous fluidized-bed process is reported which rapidly converts acetylene into carbon nanotubes (CNTs). Catalysts are first immobilized on ceramic beads and CNTs are then grown on the beads and then separated from them in a repetitive process accomplished within a single reactor simply by switching gases at a fixed temperature. CNTs of 6-10 nm diameter, three walls on average, 0.4 mm length and 99 wt.% purity were synthesized at an yield of over 70% in a reactor residence time shorter than 0.3 s. The easy and efficient production of such CNTs with in situ separation from the catalysts may accelerate the development of CNT-based nanotechnology industries.

Original languageEnglish
Pages (from-to)1972-1979
Number of pages8
JournalCarbon
Volume49
Issue number6
DOIs
Publication statusPublished - 2011 May
Externally publishedYes

Fingerprint

Carbon Nanotubes
Fluidized beds
Carbon nanotubes
Fluidized bed process
Acetylene
Catalysts
Nanotechnology
Gases
Industry
Temperature

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Sub-millimeter-long carbon nanotubes repeatedly grown on and separated from ceramic beads in a single fluidized bed reactor. / Kim, Dong Young; Sugime, Hisashi; Hasegawa, Kei; Ohsawa, Toshio; Noda, Suguru.

In: Carbon, Vol. 49, No. 6, 05.2011, p. 1972-1979.

Research output: Contribution to journalArticle

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