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首页> 外文会议>HT2008;ASME summer heat transfer conference >IMPACT OF THERMOPHORESIS ON CARBON NANOTUBE GROWTH BY CHEMICAL VAPOR DEPOSITION
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IMPACT OF THERMOPHORESIS ON CARBON NANOTUBE GROWTH BY CHEMICAL VAPOR DEPOSITION

机译：化学气相沉积法热解对碳纳米管生长的影响

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摘要

Thermophoretic effect on the growth of carbon nanotubes (CNTs) by chemical vapor deposition (CVD) has been investigated using a fully coupled gas-phase and surface chemistry model. This reactor-scale model employs conservation of mass, momentum, species, and energy equations to describe the evolution of hydrogen and hydrocarbon feed streams as they undergo thermal transport and chemical reactions within the CVD reactor. The resulting CNT growth rates on individual catalytic iron nanoparticles located on the reactor wall is predicted by the model as well as steady state velocity, temperature, and concentration fields within the reactor volume and concentrations of species adsorbed onto the nanoparticle surfaces. The effect of thermophoresis on volumetric concentration fields and surface species adsorption for deposition occurring in differing reactor boundary and flow conditions has been investigated to understand the impacts on CNT growth. This investigation is useful in order to optimize reactor design and boundary conditions to promote optimal CNT deposition rates.
机译：已使用完全耦合的气相和表面化学模型研究了通过化学气相沉积（CVD）对碳纳米管（CNT）生长的热泳效应。该反应器规模模型采用质量守恒，动量守恒，物种守恒定律和能量守恒方程来描述氢和碳氢化合物进料流在CVD反应器内进行热传输和化学反应时的演变。该模型可预测位于反应器壁上的各个催化铁纳米颗粒上的CNT生长速率，以及反应器内的稳态速度，温度和浓度场，以及吸附在纳米颗粒表面的物质的浓度。研究了热泳对在不同反应器边界和流动条件下发生的沉积的体积浓度场和表面物质吸附的影响，以了解其对CNT生长的影响。该研究对于优化反应器设计和边界条件以促进最佳CNT沉积速率很有用。

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