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). |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论