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Modeling the coke formation in the convection section tubes of a steam cracker / Sandra C. K. De Schepper in Industrial & engineering chemistry research, Vol. 49 N° 12 (Juin 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 12 (Juin 2010) . - pp. 5752–5764 Titre : Modeling the coke formation in the convection section tubes of a steam cracker Type de document : texte imprimé Auteurs : Sandra C. K. De Schepper, Auteur ; Geraldine J. Heynderickx, Auteur ; Guy B. Marin, Auteur Année de publication : 2010 Article en page(s) : pp. 5752–5764 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Steam  cracker  Liquid  hydrocarbon  droplets  CFD  code Résumé : The presence of liquid hydrocarbon droplets in the convection section of a steam cracker may cause serious fouling problems due to coke formation, especially in high temperature zones. In order to investigate these fouling problems, a model has been developed and implemented in a CFD code to accurately simulate the behavior of a hydrocarbon droplet impinging on a hot surface. The impact energy of the droplet and the hot surface temperature are found to determine the impact behavior. On the basis of the newly developed model, the positions where droplets preferentially collide with the convection section tube walls and liquid material is deposited are determined. Furthermore, a kinetic model describing coke formation out of liquid hydrocarbon droplets in the temperature range of 450−700 K has been developed to calculate the rate of coke formation in each zone of the convection section tube. The calculated coke layer thickness on the most vulnerable tube locations and the industrially available values correspond remarkably well. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100091e [article] Modeling the coke formation in the convection section tubes of a steam cracker [texte imprimé] / Sandra C. K. De Schepper, Auteur ; Geraldine J. Heynderickx, Auteur ; Guy B. Marin, Auteur . - 2010 . - pp. 5752–5764. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 12 (Juin 2010) . - pp. 5752–5764 Mots-clés : Steam  cracker  Liquid  hydrocarbon  droplets  CFD  code Résumé : The presence of liquid hydrocarbon droplets in the convection section of a steam cracker may cause serious fouling problems due to coke formation, especially in high temperature zones. In order to investigate these fouling problems, a model has been developed and implemented in a CFD code to accurately simulate the behavior of a hydrocarbon droplet impinging on a hot surface. The impact energy of the droplet and the hot surface temperature are found to determine the impact behavior. On the basis of the newly developed model, the positions where droplets preferentially collide with the convection section tube walls and liquid material is deposited are determined. Furthermore, a kinetic model describing coke formation out of liquid hydrocarbon droplets in the temperature range of 450−700 K has been developed to calculate the rate of coke formation in each zone of the convection section tube. The calculated coke layer thickness on the most vulnerable tube locations and the industrially available values correspond remarkably well. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100091e