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에탄 열분해 공정에서 관형 반응기 내벽 온도 조건이 부산물 생성에 미치는 영향
신찬영(C.Y. Shin),김혜준(H.J. Kim),안준(J. Ahn) 한국전산유체공학회 2016 한국전산유체공학회지 Vol.21 No.3
It is a essential to minimize production of by-products for economically effective petrochemical process. In order to find key factor to achieve the effective process, 2-dimensional computational fluid dynamics considering a variety of physics such as convective and radiative heat transfer and thermal cracking of ethane are carried out. The reactor is modeled as an isothermal tube, whose length is 1.2 m and radius is 0.01 m, respectively. At first, the axial distribution of representative by-products in ethane thermal cracking are investigated in each inner wall temperature conditions. Then the comparison between concentration of propene (C₃H<SUB>6</SUB><SUB></SUB>) and ethane conversion is discussed with respect to inner wall temperature conditions too. Finally, both reaction rate and turbulent kinetic energy are used to identify the production mechanism of C₃H<SUB>6</SUB> under the intersection point in the plot for C₃H<SUB>6</SUB> molar concentration and ethane conversion.
에탄 열분해 반응이 동반된 관형 반응기에서의 열전달 및 화학반응 특성 연구
신찬영(C.Y. Shin),안준(J. Ahn) 한국전산유체공학회 2016 한국전산유체공학회지 Vol.21 No.1
Thermal cracking is commonly modeled as plug flow reaction, neglecting the lateral gradients present. In this paper, 2-dimensional computational fluid dynamics including turbulence model and molecular reaction scheme are carried out. This simulation is solved by means of coupled implicit scheme for stable convergence of solution. The reactor is modeled as an isothermal tube, whose length is 1.2 m and radius is 0.01 m, respectively. At first, The radial profile of velocity and temperature at each point are predicted in its condition. Then the bulk temperature and conversion curve along the axial direction are compared with other published data to identify the reason why discussed variations of properties are important to product yield. Finally, defining a new non-dimensional number, Effect of interaction with turbulence, heat transfer and chemical reaction are discussed for design of thermal cracking furnace.