American Journal of Applied Sciences

Study of Seven-Lump Kinetic Model in the Fluid Catalytic Cracking Unit

Mehran Heydari, Habib AleEbrahim and Bahram Dabir

DOI : 10.3844/ajassp.2010.71.76

American Journal of Applied Sciences

Volume 7, Issue 1

Pages 71-76

Abstract

Problem statement: The effective simulation of the Fluid Catalytic Cracking (FCC) operation requires a good understanding of many factors such as, reaction kinetic, fluid dynamics and feed and catalyst effects. Approach: In this model the reactor has been considered as an isothermal riser. The reactions in the riser occur with the fluid and the solids in ideal plug flow. Because of complication of the catalytic cracking mechanism and existence of multi-components in the feed, to decrease the calculation content in the kinetic models, the reactants and products have been considered as a set of hydrocarbons, so these models are called “Lumped Models”. Results: To simulate the FCC riser, the seven-lump model involved residual oil, heavy lump, light lump, liquefied petroleum gas, gasoline, dry gas and coke (to predict the feed conversion and the product distribution) has been developed. Conclusion: Simulation studies are performed to investigate the effect of changing various process variables, such as temperature and residence time. Comparison of simulation results with industrial ones shows that the simulation has been achieved accurately.

Copyright

© 2010 Mehran Heydari, Habib AleEbrahim and Bahram Dabir. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.