Continuous Production of Carbon Nanotubes and Carbon Fibers with Methane, Nitrogen, and Fe(CO)5 Using a CVD Vertical Reactor

使用甲烷、氮氣及Fe(CO)5之垂立式化學氣相沉積反應器製備奈米碳管及碳纖維

林志誠(Chih-Cheng Lin) ； 黃建銘(Chien-Ming Huang) ； 郭建生(Chien-Sheng Kuo) ； 李元堯(Yuan-Yao Li) ； 胡啓章(Chi-Chang Hu) ； 陳建忠(Chien-Chong Chen)

《Journal of the Chinese Institute of Chemical Engineers》 35卷6期 (2004/11) Pp. 595-601

https://doi.org/10.6967/JCICE.200411.0595

摘要

本文主要是使用運績流動觸媒一垂直式氣相沉積反應器來合成奈米碳管，並探討反應溫度、壓國及進料的組成對生成奈米碳管産率和品質的影響。
進料反應氣體主要有三種成分：(1)氮氣(carrier gas)、(2)觸媒(Fe(CO)5)、(3)碳氫化合物(CH4)，當N2流速爲1000sccm、甲烷流速爲250sccm、觸媒流速爲0.5mL/h在反應溫度1100℃及常壓狀態下進行反應，在此最適流量比例下所得的奈米碳管的最高産量爲3.5g/h，純度大約爲30%此製程提供一個經濟、安全的製造過程並且不需要基材情況下合成奈太碳管，因此，以直立式高溫爐較適合用於連績續式量産奈米碳管。

並列摘要

Carbon nanotubes were synthesized using a CVD floating feed method with a vertical reactor. The effect of the reaction temperature, pressure, and compositions of the feedings on the production rate and quality of the carbon nanotubes are discussed. The feed mixtures included the following components: (1) nitrogen as a carrier gas; (2) Fe(CO)5 as a catalyst; and (3) methane as a source of carbon. Under limited operational conditions, a maximum yield of carbon products of 3.5g/h with CNT purity of approximately 30% could be achieved by feeding 250 sccm methane, 1000 sccm nitrogen, and Fe(CO)s at 0.5mL/h and 1100℃, with I atm. The results suggest that CNTs can be fabricated using the CVD method in the absence of substrate, and that this approach is cost-efficient and safer in terms of the operational environment with nitrogen used as a carrier gas. Moreover, the vertical reactor can be scaled up for continuous mass production carbon nanotubes.

並列關鍵字

CVD ； Carbon nanotube ； Continuous production