渣油催化裂化生焦反应集总动力学模型的研究

INVESTIGATION OF THE LUMPED KINETIC MODEL OF COKING REACTION FOR RESIDUE OIL CATALYTIC CRACKING

在柴油馏分和重馏分油催化裂化生焦反应集总动力学模型研究的基础上，通过生焦反应试验和动力学参数估计，建立渣油催化裂化生焦反应十集总动力学模型。结果表明，反应系统气相和液相均符合催化生焦机理的动力学模型，具有较好的拟合试验数据能力和良好的外推性，并符合催化裂化生焦反应规律。

The purpose of this paper is to develop the coking kinetic model of residue oil catalytic cracking.Firstly,based on investigation of the coking lumped kinetic model of diesel oil and vacuum gas oil reaction systems,two kinds of coking physical models of residue catalytic cracking reaction system,thermal coking mechanism and catalytic coking mechanism,were determined.Furthermore,over a wide range of reaction conditions,five kinds of feedstocks were cracked on the commercial equilibrium zeolite catalyst in a fix fluidized bed reactor.Based on experiment data, model parameters and activity energy were determined by use of a parameter estimation method.This work pointed out that the coking lumped kinetic model for the catalytic coking mechanism of gas phase and liquid phase cauld simulate experiment data well.It also predicted well the coke yields of the feedstock whose composition is quite different from the compositions of feedstocks used to develop the coking kinetic model and fitted well with the feature of coking reaction for RFCC reaction system.