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Citation: ZHOU Jin-Mei, WANG Yi, TANG Pei-Ping, WU Xiao-Man, LIN Guo-Dong, ZHANG Hong-Bin. Growth of Multi-walled Carbon Nanotubes by Catalytic Pyrolysis of CH₄ in Fluidized-bed Reactor[J]. Chinese Journal of Applied Chemistry, ;2005, 22(2): 117-122. shu

Growth of Multi-walled Carbon Nanotubes by Catalytic Pyrolysis of CH₄ in Fluidized-bed Reactor

1.
Institute of Chemistry & Chemical Engineering, State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005

Corresponding author: ZHANG Hong-Bin,
Received Date: 27 February 2004
Available Online: 28 July 2004
Fund Project: 国家自然科学基金(50072021) (50072021)福建省自然科学基金(2001H017)资助项目 (2001H017)

With home-made Ni_0.5Mg_0.5O as the catalyst, canbon nanotubes(CNTs) were synthesized from the catalytic pyrolysis of methane in a Φ 32 mm fluidized-bed reactor. The operation conditions for the transition of fixed catalyst-bed and fluidized catalyst-bed and their influence on the growth of CNTs were investigated. The optimized conditions in the Φ 32 mm fluidized-bed reactor are as follows, i.e., the temperature of reactor is ca. 853 K, the linear velocity of feed-gas CH₄ 18~22 cm/s and the GHSV of CH₄ 3×10⁴~6×10⁴ mL(STP)/(h·g)-catal. The maximum yield of reaction for 1 h is 10 g-CNTs/g-catal. The obtained CNT products were confirmed by means of TEM, SEM, TPH, XRD and LRS to be multi-walled carbon nanotubes(MWCNTs) with an outer diameter of 10~50 nm, and the contents of carbon and graphitic-carbon in the purified CNT products were found to be ≥99.5% and ≥90%, respectively.
- multi-walled carbon nanotubes,
- Ni-Mg-O catalyst,
- methane,
- fluidized bed,
- catalytic chemical vapor deposition method
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Growth of Multi-walled Carbon Nanotubes by Catalytic Pyrolysis of CH₄ in Fluidized-bed Reactor