인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
We present the mathematical model concepts for the synthesis of carbon nanotubes by catalytic pyrolysis of methane, based on the analysis and approximation of the dependence of the process stages on the gas phase composition and temperature. The process was considered to consist of three successive stages that include the linear stage of initial growth with a constant specific rate, the stage of growth retardation due to the catalyst active site deactivation, and the stage close to linear, occurring after equilibrium of the accompanying sorption-desorption processes on the active sites is reached. Based on the available experimental studies on a specific catalyst, a step-by-step search for mathematical patterns describing the selected phases of a typical nanotubes growth curve was performed. We have determined and confirmed the criteria for the dependence of the proposed equations parameters on the gas phase composition. The article also discusses the advantages of the proposed approach for modeling complex processes in comparison with traditional physicochemical approaches.
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