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Feedstock Effects on Selecting the Appropriate Coil Configuration for Cracking Furnaces

Authors: Ramin Karimzadeh, Nazi Rahimi, Mohammad Ghashghaee

Abstract:

In the present research, steam cracking of two types of feedstocks i.e., naphtha and ethane is simulated for Pyrocrack1-1 and 2/2 coil configurations considering two key parameters of coil outlet temperature (COT) and coil capacity using a radical based kinetic model. The computer model is confirmed using the industrial data obtained from Amirkabir Petrochemical Complex. The results are in good agreement with performance data for naphtha cracking in a wide range of severity (0.4-0.7), and for ethane cracking on various conversions (50-70). It was found that Pyrocrack2-2 coil type is an appropriate choice for steam cracking of ethane at reasonable ethylene yield while resulting in much lower tube wall temperature while Pyrocrack1-1 coil type is a proper selection for liquid feedstocks i.e. naphtha. It can be used for cracking of liquid feedstocks at optimal ethylene yield whereas not exceeding the allowable maximum tube temperature.

Keywords: Coil configuration, Ethane, Naphtha, Steamcracking.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1332452

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References:


[1] Z. Renjun, "Fundamentals of Pyrolysis", Lewis Pub (1993).
[2] B. P. Ennis, H. B. Boyd, R. Orriss, "Olefin manufacture via millisecond pyrolysis" Chemtech, November, 693-703, (1975)
[3] J. L. de. Blieck, A. G. Goossens, "Optimize Olefin Cracking Coils", Hydrocarbon Processing, March, 76-80, (1971)
[4] L. F. Albright, B. L. Crynes, "Industrial and Laboratory Pyrolysis", ACS Symposium Series, (1976)
[5] P. M. Plehiers, G. F. Froment, "Reversed Split Coil improves ethylene yields", Oil and Gas Journal-Technology, 41-49, (1987)
[6] A. K. Parameswaran, V. K. Sharma, D. Kunzru, "Modeling of Naphtah pyrolysis in swaged coils" The Canadian Journal of Chemical Engineering, 66, 957-963, (1988)
[7] G. J. Heynderickx, G. F. Froment, P. S. Broutin, C. R. Busson, J. E. Weill, "Modeling and simulation of a honeycomb Reactor for High- Severity Thermal cracking", AICHE Journal, 37, 1354-1364, (1991)
[8] P. M. Plehiers, G. F. Froment, "The Uno-Quattro Coil: High Severities for Increased Ethylene selectivity", Ind. Eng. Chem. Res., 30, 1081- 1086, (1991)
[9] G. J. Heyderickx, G. F. Froment, G. H. Martin, "A shell and Tube. Pyrolysis Reactor for Olefin Production", Ind. Eng. Chem. Res., 31, 2080-2087, (1992)
[10] R. Karimzadeh , M. Ghashgaee, "Design of a flexible pilot plant reactor for the steam cracking process" , Chem. Eng. Tech., 31, No.2, 278-286, (2008)
[11] R Karimzadeh, A. Hematian, M. R. Omidkhah, "The Effect Of Coil Configuration On Run Length Of Thermal Cracking Reactors", International Journal Of Chemical Reactor Engineering, Vol. 5, Article A118, (2007)
[12] J. Fernandez, "Factors Affecting Pyrolysis Heater selectivity", A.I.Ch.E. Journal, Vol. 18, 18-31, (1972)
[13] J. E. Gwyn, "Universal yield models for the steam pyrolysis of hydrocarbons to Olefins", Fuel Processing Technology, vol 701, 1.7, (2001)
[14] P.M. Plehiers, G. C. Reyniers, G. F. Froment, "Simulation of The Run Length of An Ethane Cracking Furnace", Ind. Eng. Chem. Res., (Vol.29), 636-644, (1990)