MODELING CRAQUEAMENTO CATALITICO POLIMERIZACAO ORTHOGONAL COLLOCATION REGENERATION SYSTEM SIMULATION SOLID VOLUME FRACTION DENSE PHASE NEURAL NETWORK POLIMERIZATION MODELING AND SIMULATION COMPUTATIONAL FLUID DYNAMICS MODELLING AND SIMULATION REATOR REACTOR REDES NEURAIS DIFUSÃO PETROCHEMICAL HYDRODYNAMIC MODEL BIOMASS GASEIFICATION TWO-PHASE SYSTEM POLYMERIZATION POLYMERS PREPOLYMERIZATION GAS-SOLID SUGARCANE BAGASSE MODELO HETEROGENEO POLYETHYLENE MODELOS HETEROGENEOS PHYSICAL-CHEMICAL CHARACTERIZATION INDUSTRIA PETROQUIMICA MODELAGEM E SIMULAÇÃO