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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received November 6, 2005
Accepted March 17, 2006

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Synthesis of multi-walled carbon nanotube in a gas-solid fluidized bed

Seung Yong Son Dong Hyun Lee^† Sang Done Kim¹ Su Whan Sung² Young Soo Park³ Jong Hun Han³

Department of Chemical Engineering, Sungkyunkwan University, 300 Chunchun, Jangan, Suwon 440-746, Korea ¹Department of Chemical and Biomolecular Engineering & Energy and Environment Research Center, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea ²Department of Chemical Engineering, Kyungpook National University, Daegu 702-701, Korea ³Iljin Nanotech Co., Kayang Techno Town 1487, Seoul 157-810, Korea

dhlee@skku.edu

Korean Journal of Chemical Engineering, September 2006, 23(5), 838-841(4), 10.1007/BF02705937

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Abstract

Multi-walled carbon nano-tubes (MWCNTs) were produced by acetylene decomposition on Fe-catalyst in a fluidized bed reactor (0.056 m-ID×1.0m-high) with a sintered metal distributor (40 μm pore size). The Fe-catalysts were tested in decomposition of the different ratios of acetylene, hydrogen and nitrogen at the temperature range of 823-973 K. The physical properties of the carbon nano-tubes were determined by HR-TEM, SEM and Raman spectroscopy. The multi-walled carbon nano-tubes produced from the fluidized bed reactor are sub-aggregates and entangled with each other. The synthesized MWCNTs have outer diameters of a few tens of nanometers at 823-973 K. It has been found that the synthesized CNT agglomerates are in good condition with less amorphous carbon with the reaction time of 30 to 60 minutes from the analyses of Raman Spectra, SEM and TEM, The ratio (ID/IG) of amorphous carbon (ID=1,295 cm-1) and crystalline carbon (IG=1,590 cm-1) range from 1.15 to 1.49.

Keywords

Carbon Nanotubes Fluidized Beds Catalytic Chemical Vapor Deposition

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