Simulation of fluid catalytic cracking risers - a six lump model Negrao, Cezar Otaviano Ribeiro; Baldessar, Fabio [Universidade Tecnologica Federal do Parana (UTFPR), Curitiba, PR (Brazil). Programa de Pos-graduacao em Engenharia Mecanica e de Materiais (PPGEM). Lab. de Ciencias Termicas (LACIT)] 02 PETROLEUM; PETROLEUM; CATALYTIC CRACKING; CATALYSIS; HYDROCRACKING; THERMAL CRACKING; COAL LIQUEFACTION; TWO-PHASE FLOW; LIQUID FLOW; TURBULENT FLOW; STEADY-STATE CONDITIONS; STEADY FLOW The current work presents the modeling of the riser of Fluid Catalytic Cracking (FCC) Units. The flow and the cracking reactions are considered two-phased (fluid and solid), one-dimensional and steady. Mass, momentum and energy equation are admitted for fluid and solid phases. The finite difference method was used for the solution of the ordinary differential equations. A six lump kinetics model is employed to evaluate the gasoil, gasoline, LPG, fuel gas, light cycle oil (LCO) and coke lumps. A feedstock vaporization approach is described. Comparisons of the six with a four lump model was conducted and of the vaporization model with instantaneous vaporization were conducted. The results reveal the vaporization has influence on the product composition at the riser outlet. Besides, the kinetics models also is very important on the cracking reactions. (author) Associacao Brasileira de Engenharia e Ciencias Mecanicas (ABCM), Rio de Janeiro, RJ (Brazil) Available from the Library of the Brazilian Nuclear Energy Commission, Rio de Janeiro, in electronic form Brazil 2006-07-01 English Conference Conference: ENCIT 2006: 11. Brazilian congress of thermal sciences and engineering, Curitiba, PR (Brazil), 5-8 Dec 2006; Other Information: Code: CIT06-1042 Medium: X; Size: 12 pages https://doi.org/ [] TRN: BR10V0383 BR 2012-12-20 21261106