渣油催化裂化反应集总动力学模型的研究

Investigation of the Lump Kinetic Model for Residue Catalytic Cracking Reaction

本文应用集总理论,将渣油催化裂化反应系统归并为减压渣油、重燃料油、轻燃料油、汽油和气体+焦炭,又将减压渣油、重燃料油、轻燃料油划分为烷基碳、环烷碳和芳香碳,提出了渣油催化裂化反应物理模型.考虑到碱性(?)中毒、重芳环吸附和生焦引起的时变失活的影响,通过催化裂化反应实验和参数估计,测定反应速率常数和活化能参数,建立了可预测产品分布的渣油催化裂化反应十一集总动力学模型.

The purpose of this work was to develop a lump kinetic model for residue catalytic cracking reaction. The kinetic model consists of eleven lumped species that are paraffinic carbon (>773K), naphthenic carbon (>773K), aromatic carbon (>773K) paraffinic carbon (623～773 K), napnhtenic carbon (623～773 K), aromatic carbon (623～773 K), naphthenic carbon (477～623K), paraffinic carbon (477～623K), aromatic carbon (477～623K), gasoline, and C lump (gas+coke). The kinetic model also incorporates the effect of nitrogen poisoning, aromatic ring adsorption, and time depedent catalyst decay. By the experimental data over a wide range of reaction conditions, the rata constants and activation energy parameters of the model were measured by parameter estimation. The investigation indicated that the eleven-lump kinetic model for residue catalytic cracking had the capability of predicting well the product distribution for various feedstocks. It is possible for the model to be used to provide basis for commercial units optimization of residue catalytic cracking.