Publisher : Korea Society of Computational Fluids Engineering
DOI : 10.6112/kscfe.2016.21.1.043
Title & Authors
THE CHARACTERISTICS OF HEAT TRANSFER AND CHEMICAL REACTION FOR THERMAL CRACKING OF ETHANE IN TUBULAR REACTOR Shin, C.Y.; Ahn, J.;
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.
1976, Froment, G.F., Vand de steene, B.O. and Van Damme, P.S., "Thermal Cracking of Ethane and Ethane-Propane Mixtures," Ind. Eng. Chem., Process Des. Dev., Vol.15, No.4.
1979, Sundaram, K.M. and Froment, G.F., "A Comparison of Simulation Models for Empty Tubular Reactors," Chemical Engineering Science, Vol.34, pp.117-124.
2006, Grag, R.K., Krishnan, V.V. and Srivastava, V.F., "Prediction of Concentraion and Temperature Profiles for non-isothermal Ethane Cracking in a pipe reactor," Korean J. Chem. Eng., 23(4), pp.531-539.
2013, Nan, Z., Tong, Q. and Bingzhen, C., "CFD simulation of Propane Cracking Tube Using Detailed Radical Kinetic Mechanism," Chinese Journal of Chemical Engineering, 21(12), pp.1319-1331.
2015, STAR-CCM+ Version 10.04, User Guide, CD-Adapco.
2005, Schmidt, L.D., "The Engineering of Chemical Reactions," Second edition, Oxford university press.