CFD MODELING AND SIMULATION OF AN INDUSTRIAL RESIDUE FLUID CATALYTIC CRACKING (RFCC) RISER

• Main Author: OSMAN MOHAMED AHMED, AISHA
• Format: Thesis
• Language: English
• Published: 2015
• Subjects: TP Chemical technology
• Online Access: http://utpedia.utp.edu.my/id/eprint/21269/1/2014%20-CHEMICAL%20-%20CFD%20MODELING%20%26%20SIMULATION%20OF%20AN%20INDUSTRIAL%20RESIDUE%20FLUID%20CATALYTIC%20CRACKING%20%28RFCC%29%20RISER%20-%20AISHA%20OSMAN%20MOHAMED%20AHMED.pdf; http://utpedia.utp.edu.my/id/eprint/21269/

A multi-fluid Eulerian model is applied to simulate the flow behavior and catalytic cracking reactions in the riser of an industrial Residue Fluid Catalytic Cracking (RFCC) unit in Khartoum Refinery Company (KRC), Sudan. In this riser atmospheric residue is cracked into diesel, gasoline, lighter gases and coke over Zeolite catalyst surface. 2D and 3D CFD models are developed for the solid - gas flow in the riser and solved using ANSYS FLUENT in Workbench 14. The quadrilateral mesh for 2D model and the hexahedral mesh for the 3D model are sized in a grid independent test. In the hydrodynamic model, the k-e gas-solid turbulent flow per phase model is used, and the particle-level fluctuations are modeled in the framework of the kinetic theory of granular flow (KTGF) to simulate the flow in the riser. On validating this hydrodynamic model, the particle volume fraction and velocity profiles show very good agreement with the published experimental data.