Three-Dimensional Simulation of a Fluid Catalytic Cracking Riser Reactor

2003 ◽  
Vol 42 (12) ◽  
pp. 2602-2617 ◽  
Author(s):  
Asit K. Das ◽  
Edward Baudrez ◽  
Guy B. Marin ◽  
Geraldine J. Heynderickx
Keyword(s):  
Catalytic Cracking ◽  
Three Dimensional ◽  
Fluid Catalytic Cracking ◽  
Riser Reactor ◽  
Dimensional Simulation

Three-Dimensional Hydrodynamics and Reaction Kinetics Analysis in FCC Riser Reactors

2007 ◽  
Vol 2 (2) ◽  
Author(s):  
Novia Novia ◽  
Martyn S. Ray ◽  
Vishnu Pareek
Keyword(s):  
Catalytic Cracking ◽  
Three Dimensional ◽  
Fluid Catalytic Cracking ◽  
Fluid Mixing ◽  
Coke Deposition ◽  
Complex Interactions ◽  
Riser Reactor ◽  
Riser Reactors ◽  
Riser Height ◽  
Independent Parameters

Fluid catalytic cracking (FCC) is the refinery process for the conversion of high molecular-weight hydrocarbons to produce higher valuable products such as gasoline. The optimization of FCC process is challenging due to the complex interactions between a large number of dependent and independent parameters. One of the most uncertain aspects of a fluid catalytic cracking (FCC) unit is the description of fluid-solid mixing at the riser entrance. Most of the existing models assume an instant mixing of solids and gaseous reactants. However, a finite mixing length at the bottom of the riser may have a pronounced effect on the FCC operation, particularly, when very short residence times are allowed in the current commercial FCC risers. A good solid-fluid mixing is essential to ensure a complete feed vaporization which is important for several reasons including assuring a thorough catalyst to oil contact and minimizing coke deposition. In this study, the Eulerian-Eulerian multiphase flow and the 3-lump kinetic models were used to simulate the hydrodynamics and cracking reactions occurring in the FCC riser reactors. The model demonstrated the capability of commercial CFD code FLUENT 6.2 to describe the flow field in the riser reactor. The model also takes into account the temperature, the heat of reactions and gasoline distribution along the riser height.

Modeling of Fluid Catalytic Cracking Riser Reactor: A Review

2010 ◽  
Vol 8 (1) ◽  
Author(s):  
Raj Kumar Gupta ◽  
Vineet Kumar ◽  
V.K. Srivastava
Keyword(s):  
Catalytic Cracking ◽  
Fluid Catalytic Cracking ◽  
Mass Transfer Resistance ◽  
Complete Model ◽  
Transfer Resistance ◽  
Deactivation Kinetics ◽  
Multiple Reactions ◽  
Riser Reactor ◽  
Computational Fluid Dynamics Cfd ◽  
Physical Phenomena

This work aims at compiling the important works on the modeling of a fluid catalytic cracking (FCC) riser reactor. The modeling of a riser reactor is very complex due to complex hydrodynamics and unknown multiple reactions, coupled with mass transfer resistance, heat transfer resistance and deactivation kinetics. A complete model of the riser reactor should include all the important physical phenomena and detailed reaction kinetics. As the computational fluid dynamics (CFD) is emerging as a powerful tool for modeling the FCC riser, various works on riser modeling using CFD are also included in the paper.

scholarly journals NUMERICAL SIMULATION OF FCC RISERS

2003 ◽  
Vol 2 (2) ◽  
pp. 17 ◽  
Author(s):  
J. A. Souza ◽  
J. V. C. Vargas ◽  
O. F. Von Meien ◽  
W. Martignoni
Keyword(s):  
Fluid Flow ◽  
Catalytic Cracking ◽  
Three Dimensional ◽  
Gas Oil ◽  
Algebraic Equations ◽  
Heterogeneous Catalytic ◽  
Riser Reactor ◽  
Energy Equations ◽  
Cracking Process ◽  
Physical And Chemical

The catalytic cracking of hydrocarbons in a FCC riser is a very complex physical and chemical phenomenon, which combines a three-dimensional, three-phase fluid flow with a heterogeneous catalytic cracking kinetics. Several researchers have carried out the modeling of the problem in different ways. Depending on the main objective of the modeling it is possible to find in the literature very simple models while in other cases, when more accurate results are necessary, each equipment is normally treated separately and a set of differential and algebraic equations is written for the problem. The riser reactor is probably the most important equipment in a FCC plant. All cracking reactions and fuel formation occur during the short time (about 4-5s) that the gas oil stays in contact with the catalyst inside the riser. This work presents a simplified model to predict the, temperature and concentrations in a FCC riser reactor. A bi-dimensional fluid flow field combined with a 6 lumps kinetic model and two energy equations (catalyst and gas oil) are used to simulate the gas oil cracking process. Based on the velocity, temperature and concentration fields, it is intended, on a next step, to use the second law of thermodynamic to perform a thermodynamic optimization of the system.

Simulation of an Industrial Fluid Catalytic Cracking Riser Reactor Using a Novel 10-Lump Kinetic Model and Some Parametric Sensitivity Studies

2014 ◽  
Vol 53 (51) ◽  
pp. 19660-19670 ◽  
Author(s):  
Prabha K. Dasila ◽  
Indranil R. Choudhury ◽  
Sanjeev Singh ◽  
Santanam Rajagopal ◽  
Sawaran J. Chopra ◽  
...  
Keyword(s):  
Kinetic Model ◽  
Catalytic Cracking ◽  
Fluid Catalytic Cracking ◽  
Parametric Sensitivity ◽  
Riser Reactor ◽  
Sensitivity Studies
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