Fluidized-bed production of 0.3 mm-long single-wall carbon nanotubes at 28% carbon yield with 0.1 mass% catalyst impurities using ethylene and carbon dioxide

Mochen Li, Soichiro Hachiya, Zhongming Chen, Toshio Osawa, Hisashi Sugime, Suguru Noda

Research output: Contribution to journalArticlepeer-review

Abstract

To produce carbon nanotubes (CNTs) practically, a high carbon source concentration and high carbon yield are essential. By feeding moderately active ethylene at 10–20 vol% with mildly oxidative carbon dioxide at 1 vol%, submillimeter-long single-wall CNT (SWCNT) arrays were synthesized via fluidized-bed chemical vapor deposition using an Fe/AlOx catalyst sputtered on ceramic beads. SWCNTs with an average diameter of 2.9 nm, long length (0.3 mm), low catalyst impurity (0.1 mass%), and high specific surface area (1178 m2/g) were obtained at a high carbon yield of 28%. This study thus introduces a route for more efficient and cleaner production of long and pure SWCNTs.

Original languageEnglish
Pages (from-to)23-31
Number of pages9
JournalCarbon
Volume182
DOIs
Publication statusPublished - 2021 Sep

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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