Abstract
The growth of carbon nanotubes (CNT) in flame requires imperative conditions that are difficult to achieve in a highly heterogeneous environment. Therefore, the analysis of the properties of the reaction zone within the flame is critical for the optimal growth of CNT. In the present study, a comprehensive analysis of the CNT synthesis using premixed methane flame is conducted regarding the morphology and crystallinity of the grown products. The premixed burner configuration created a flame that is stabilized across axisymmetric stagnation flow through sintered metal, making the flame one-dimensional. As a result, a relatively uniform temperature distribution is achieved across radial directions but 17% temperature different in vertical distances, causing a difference in the characteristic pattern of the growth products. A 44% of CNT diameter variation was observed between high and low height-above-burner (HAB). Additionally, 66% variation ID/IG ratio was observed on the same HAB range. The relationship between temperature distribution, morphology, and HAB created a simpler control parameter that can be further optimized for better yield.
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