Modeling of molecular weight distribution of propylene slurry phase polymerization on supported metallocene catalysts

被引：1

作者：

Huang, Kai ^{[1
,2
]}

Xie, Ruijin ^{[1
]}

机构：

[1] Southeast Univ, Sch Chem & Chem Engn, Nanjing 211189, Jiangsu, Peoples R China

[2] Southeast Univ, Changzhou Inst, Changzhou 213164, Peoples R China

来源：

JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY | 2014年 / 20卷 / 01期

关键词：

Particle growth model; Propylene polymerization; Molecular weight distribution; Metallocene catalyst; HETEROGENEOUS ZIEGLER CATALYSTS; OLEFIN POLYMERIZATION; MASS-TRANSFER; PARTICLE GROWTH; POLYPROPYLENE; SIMULATION; REACTOR; CONVECTION; MORPHOLOGY; HEAT;

D O I：

10.1016/j.jiec.2013.03.029

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A mathematical model of the molecular weight distribution (MWD) based on a particle growth model and the kinetic scheme is developed to simulate the MWD of the slurry phase propylene polymerization on a silica-supported metallocene catalyst by means of the equations of moments. The model is used to predict molecular weight distribution, including the number-average molecular weight, the weight-average molecular weight, and the polydispersity index. The results show that the mass transfer has great influence on the polymerization reaction, and it can broaden the MWD especially; moreover, the MWD can be evaluated by simulation; the average molecular weight increases as pressure or temperature, and MWD shifts to long chain lengths as the effective diffusion coefficient increasing thought the influence is not remarkable; furthermore, the MWD's simulation results are calculated, which fit greatly with the experimental data. (C) 2013 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.

引用

页码：338 / 344

页数：7

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