射频感应热等离子体连续合成单壁碳纳米管的建模

Kenn Su Kim, G. Soucy, A. Moradian, J. Mostaghimi
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摘要

为了更好地了解工艺参数(如等离子体气体组成、进料速率和等离子体功率)对单壁碳纳米管(SWNT)形成的影响,并确定最适合单壁碳纳米管合成的最佳工艺环境,在电感耦合热等离子体反应器中对单壁碳纳米管(SWNT)的连续合成进行了数值和实验研究。在数值研究中,建立了由等离子体产生、等离子体-粒子相互作用、SWNT前体成核和输运以及化学反应等几个子模型组成的自一致数值模型,准确模拟了整个感应等离子体系统的SWNT合成过程。在此基础上,进行了系统参数和综合参数的参数化研究,验证了数值模型的有效性。根据数值和实验结果,提出了合适的射频感应等离子体工艺条件,以有效地合成SWNT。
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Modeling of continuous synthesis of single-walled carbon nanotubes by RF induction thermal plasma
Numerical and experimental studies have been performed on the continuous synthesis of single-walled carbon nanotubes (SWNT) in an inductively coupled thermal plasma reactor, in order to get better understanding of the effects of process parameters (ex., plasma gas composition, feed rate, and plasma power) on the SWNT formation and to determine the optimal process environment most suitable for SWNT synthesis. In the numerical study, a self consistent numerical model, which consists of several sub-models (i.e., plasma generation, plasma-particle interaction, nucleation and transport of SWNT precursors, and chemical reaction), is developed to accurately simulate the SWNT synthesis process in the entire region of the induction plasma system. And then, a parametric study of various system and synthesis parameters was conducted experimentally to confirm validity of the numerical model. Base on the numerical and experimental results, the appropriate operating conditions of the RF induction plasma process are suggested for an effective synthesis of SWNT.
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