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	Synthesis of High-Quality, Double-Walled Carbon Nanotubes in a Fluidized Bed Reactor
	Liu, Yi ; Qian, Weizhong ; Zhang, Qiang ; Ning, Guoqing ; Luo, Guohua ; Wang, Yao ; Wang, Dezheng ; Wei, Fei
	2010-10-12 ; 2010-10-12
关键词	Carbon nanotubes Catalysts Chemical vapor deposition Fluidized beds Hydrogen effect CHEMICAL-VAPOR-DEPOSITION FORMATION MECHANISM POROUS CATALYSTS METAL PARTICLES GROWTH CVD METHANE MGO Engineering, Chemical
中文摘要	Double-walled carbon nanotubes (DWCNTs) were synthesized in a packed bed reactor (PBR) and a fluidized bed reactor (FBR) by cracking CH4 oil a Fe/MgO catalyst. It is observed that the dominant carbon product changes drastically from DWCNTs to multi-walled CNTs along the axial direction of PBR. The studies indicated that the high concentration of H-2 from the high conversion of CH4 causes the quick reduction and sintering of the iron catalyst and inhibits the nucleation of DWCNTs. Based on these results, the batch or continuous feeding mode of small amounts of catalyst was adopted in a FBR to maintain a high space velocity of CH4 and to inhibit the negative effect of excess H-2. Finally, a DWCNT product with a specific surface area of 950 m(2)/g and a purity of 98 %, was obtained.
语种	英语 ; 英语
出版者	WILEY-V C H VERLAG GMBH ; WEINHEIM ; PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/79560]
专题	清华大学
推荐引用方式 GB/T 7714	Liu, Yi,Qian, Weizhong,Zhang, Qiang,et al. Synthesis of High-Quality, Double-Walled Carbon Nanotubes in a Fluidized Bed Reactor[J],2010, 2010.
APA	Liu, Yi.,Qian, Weizhong.,Zhang, Qiang.,Ning, Guoqing.,Luo, Guohua.,...&Wei, Fei.(2010).Synthesis of High-Quality, Double-Walled Carbon Nanotubes in a Fluidized Bed Reactor..
MLA	Liu, Yi,et al."Synthesis of High-Quality, Double-Walled Carbon Nanotubes in a Fluidized Bed Reactor".(2010).

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